HP A5830 Series Installation manual

HP A5830 Switch Series
Layer 2 - LAN Switching
Command Reference
Abstract
This document describes the commands and command syntax options available for the HP A Series
products.
This document is intended for network planners, field technical support and servicing engineers, and
network administrators who work with HP A Series products.
Part number: 5998-2073
Software version: Release 1109
Document version: 6W100-20110715

Legal and notice information
© Copyright 2011 Hewlett-Packard Development Company, L.P.
No part of this documentation may be reproduced or transmitted in any form or by any means without
prior written consent of Hewlett-Packard Development Company, L.P.
The information contained herein is subject to change without notice.
HEWLETT-PACKARD COMPANY MAKES NO WARRANTY OF ANY KIND WITH REGARD TO THIS
MATERIAL, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
AND FITNESS FOR A PARTICULAR PURPOSE. Hewlett-Packard shall not be liable for errors contained
herein or for incidental or consequential damages in connection with the furnishing, performance, or use
of this material.
The only warranties for HP products and services are set forth in the express warranty statements
accompanying such products and services. Nothing herein should be construed as constituting an
additional warranty. HP shall not be liable for technical or editorial errors or omissions contained herein.

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Contents
Ethernet interface configuration commands·················································································································· 1
General Ethernet interface configuration commands····································································································1
default········································································································································································1
description·································································································································································1
display counters························································································································································2
display counters rate················································································································································3
display interface ·······················································································································································5
display packet-drop interface······························································································································· 14
display packet-drop summary ······························································································································ 15
display port combo ··············································································································································· 16
duplex····································································································································································· 16
flow-interval···························································································································································· 17
interface·································································································································································· 18
jumboframe enable ··············································································································································· 18
link-delay ································································································································································ 19
loopback ································································································································································ 20
port link-mode ························································································································································ 20
port link-mode interface-list··································································································································· 21
reset counters interface ········································································································································· 22
reset packet-drop interface··································································································································· 23
shutdown ································································································································································ 23
speed ······································································································································································ 24
Layer 2 Ethernet interface configuration commands ·································································································· 25
broadcast-suppression ·········································································································································· 25
display loopback-detection ·································································································································· 26
display port-group manual ··································································································································· 27
group-member························································································································································ 28
loopback-detection action ···································································································································· 29
loopback-detection control enable ······················································································································ 30
loopback-detection enable ··································································································································· 30
loopback-detection interval-time ·························································································································· 31
loopback-detection per-vlan enable ···················································································································· 32
mdi·········································································································································································· 33
multicast-suppression············································································································································· 33
port auto-power-down··········································································································································· 35
port-group manual················································································································································· 35
speed auto ····························································································································································· 36
unicast-suppression················································································································································ 37
virtual-cable-test ····················································································································································· 38
Layer 3 Ethernet interface configuration commands ·································································································· 39
mtu ·········································································································································································· 39
Loopback and null interface configuration commands······························································································40
default····································································································································································· 40
description······························································································································································ 40
display interface loopback··································································································································· 41
display interface null············································································································································· 44
interface loopback ················································································································································ 46
interface null ·························································································································································· 46
reset counters interface loopback························································································································ 47

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reset counters interface null·································································································································· 47
shutdown ································································································································································ 48
MAC address table configuration commands············································································································49
display mac-address ············································································································································· 49
display mac-address aging-time ·························································································································· 50
display mac-address statistics ······························································································································ 51
mac-address (interface view) ······························································································································· 52
mac-address (system view) ··································································································································· 53
mac-address mac-learning disable······················································································································ 54
mac-address max-mac-count ································································································································ 55
mac-address timer ················································································································································· 56
MAC Information configuration commands················································································································58
mac-address information enable (Ethernet interface view) ··············································································· 58
mac-address information enable (system view)·································································································· 58
mac-address information interval························································································································· 59
mac-address information mode ··························································································································· 60
mac-address information queue-length ··············································································································· 60
Ethernet link aggregation configuration commands ··································································································62
default····································································································································································· 62
description······························································································································································ 62
display interface ···················································································································································· 63
display lacp system-id··········································································································································· 66
display link-aggregation load-sharing mode······································································································ 67
display link-aggregation member-port ················································································································ 69
display link-aggregation summary ······················································································································ 71
display link-aggregation verbose ························································································································ 73
enable snmp trap updown ··································································································································· 75
interface bridge-aggregation ······························································································································· 76
lacp period short ··················································································································································· 77
lacp system-priority················································································································································ 77
link-aggregation lacp traffic-redirect-notification enable··················································································· 78
link-aggregation load-sharing mode ··················································································································· 78
link-aggregation load-sharing mode local-first ··································································································· 80
link-aggregation mode·········································································································································· 81
link-aggregation port-priority ······························································································································· 81
port link-aggregation group ································································································································· 82
reset counters interface ········································································································································· 82
reset lacp statistics················································································································································· 83
shutdown ································································································································································ 84
Port isolation configuration commands ·······················································································································85
display port-isolate group····································································································································· 85
port-isolate enable················································································································································· 86
Spanning tree configuration commands ·····················································································································88
active region-configuration··································································································································· 88
bpdu-drop any······················································································································································· 88
check region-configuration··································································································································· 89
display stp······························································································································································ 90
display stp abnormal-port····································································································································· 99
display stp bpdu-statistics ···································································································································100
display stp down-port··········································································································································103
display stp history················································································································································104
display stp ignored-vlan ·····································································································································106

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display stp region-configuration ························································································································107
display stp root ····················································································································································108
display stp tc························································································································································109
instance ································································································································································111
region-name·························································································································································112
reset stp ································································································································································112
revision-level·························································································································································113
stp bpdu-protection··············································································································································114
stp bridge-diameter ·············································································································································114
stp compliance·····················································································································································115
stp config-digest-snooping··································································································································116
stp cost··································································································································································117
stp edged-port······················································································································································118
stp enable·····························································································································································119
stp ignored vlan···················································································································································121
stp loop-protection···············································································································································121
stp max-hops························································································································································122
stp mcheck ···························································································································································123
stp mode·······························································································································································124
stp no-agreement-check ······································································································································124
stp pathcost-standard ··········································································································································125
stp point-to-point ··················································································································································126
stp port priority ····················································································································································127
stp port-log ···························································································································································128
stp priority ····························································································································································129
stp region-configuration······································································································································130
stp root primary ···················································································································································130
stp root secondary···············································································································································131
stp root-protection················································································································································132
stp tc-protection····················································································································································133
stp tc-protection threshold···································································································································134
stp timer forward-delay·······································································································································134
stp timer hello ······················································································································································135
stp timer max-age················································································································································136
stp timer-factor ·····················································································································································137
stp transmit-limit ···················································································································································138
vlan-mapping modulo ·········································································································································139
BPDU tunneling configuration commands················································································································ 140
bpdu-tunnel dot1q ···············································································································································140
bpdu-tunnel tunnel-dmac·····································································································································141
VLAN configuration commands ································································································································ 143
VLAN configuration commands··································································································································143
default···································································································································································143
description····························································································································································143
display interface vlan-interface ··························································································································144
display vlan··························································································································································147
interface vlan-interface········································································································································149
ip address ····························································································································································150
mtu ········································································································································································151
name·····································································································································································151
reset counters interface vlan-interface ···············································································································152
shutdown ······························································································································································153
vlan ·······································································································································································153
Port-based VLAN configuration commands···············································································································154

iv
display port··························································································································································154
port········································································································································································155
port access vlan···················································································································································156
port hybrid pvid···················································································································································157
port hybrid vlan ···················································································································································158
port link-type ························································································································································160
port trunk permit vlan··········································································································································161
port trunk pvid ·····················································································································································162
MAC-based VLAN configuration commands ············································································································163
display mac-vlan··················································································································································163
display mac-vlan interface··································································································································165
mac-vlan enable ··················································································································································166
mac-vlan mac-address·········································································································································166
mac-vlan trigger enable······································································································································167
port pvid disable ·················································································································································168
vlan precedence ··················································································································································169
Protocol-based VLAN configuration commands ·······································································································169
display protocol-vlan interface···························································································································169
display protocol-vlan vlan ··································································································································170
port hybrid protocol-vlan ····································································································································171
protocol-vlan ························································································································································173
IP subnet-based VLAN configuration commands······································································································175
display ip-subnet-vlan interface··························································································································175
display ip-subnet-vlan vlan ·································································································································176
ip-subnet-vlan ·······················································································································································177
port hybrid ip-subnet-vlan···································································································································177
Isolate-user-VLAN configuration commands············································································································· 180
display isolate-user-vlan······································································································································180
isolate-user-vlan····················································································································································182
isolate-user-vlan enable·······································································································································183
isolated-vlan enable ············································································································································183
port isolate-user-vlan promiscuous ·····················································································································184
port isolate-user-vlan host ···································································································································187
GVRP configuration commands································································································································· 189
display garp statistics··········································································································································189
display garp timer ···············································································································································190
display gvrp local-vlan········································································································································191
display gvrp state················································································································································191
display gvrp statistics··········································································································································193
display gvrp status ··············································································································································194
display gvrp vlan-operation ·······························································································································195
garp timer hold····················································································································································195
garp timer join·····················································································································································196
garp timer leave ··················································································································································197
garp timer leaveall ··············································································································································197
gvrp·······································································································································································198
gvrp registration ··················································································································································199
reset garp statistics··············································································································································200
QinQ configuration commands ································································································································ 201
nest········································································································································································201
qinq enable··························································································································································202
qinq ethernet-type customer-tag ·························································································································202
qinq ethernet-type service-tag ····························································································································203

v
qinq transparent-vlan ··········································································································································204
VLAN mapping configuration commands················································································································ 206
nest········································································································································································206
qinq enable downlink·········································································································································206
qinq enable uplink ··············································································································································207
remark customer-vlan-id ······································································································································208
remark service-vlan-id ·········································································································································208
LLDP configuration commands··································································································································· 210
display lldp local-information·····························································································································210
display lldp neighbor-information······················································································································213
display lldp statistics ···········································································································································218
display lldp status················································································································································219
display lldp tlv-config ··········································································································································221
lldp admin-status··················································································································································223
lldp check-change-interval ··································································································································224
lldp enable ···························································································································································224
lldp encapsulation snap······································································································································225
lldp fast-count·······················································································································································225
lldp hold-multiplier···············································································································································226
lldp management-address-format string ············································································································227
lldp management-address-tlv······························································································································227
lldp notification remote-change enable·············································································································228
lldp timer notification-interval·····························································································································229
lldp timer reinit-delay ··········································································································································229
lldp timer tx-delay················································································································································230
lldp timer tx-interval·············································································································································230
lldp tlv-enable·······················································································································································231
Service loopback group configuration commands ································································································· 234
display service-loopback group·························································································································234
port service-loopback group ······························································································································235
service-loopback group ······································································································································236
Support and other resources ····································································································································· 237
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Subscription service ············································································································································237
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Index············································································································································································· 240

1
Ethernet interface configuration commands
General Ethernet interface configuration commands
default
Description
Use the default command to restore the default settings for an Ethernet interface.
This command might fail to restore the default settings for some commands for reasons such as command
dependencies and system restrictions. You can use the display this command in interface view to check
for these commands, and perform their undo forms or follow the command reference to individually
restore their default settings. If your restoration attempt still fails, follow the error message to resolve the
problem.
CAUTION:
The default command might interrupt ongoing network services. Make sure you are fully
aware of the impacts of this command when you perform it on a live network.
Syntax
default
View
Ethernet interface view
Default level
2: System level
Parameters
None
Example
# Restore the default settings for interface GigabitEthernet 1/0/1.
<Sysname> system-view
[Sysname] interface gigabitethernet 1/0/1
[Sysname-GigabitEthernet1/0/1] default
This command will restore the default settings. Continue? [Y/N]:y
description
Description
Use the description command to change the description of the interface.
Use the undo description command to restore the default.

2
The default description of an interface is the interface name plus Interface. For example,
GigabitEthernet1/0/1 Interface.
Related commands: display interface.
Syntax
description text
undo description
View
Ethernet interface view
Default level
2: System level
Parameter
text: Specifies the interface description, a string of 1 to 80 characters. The string can include case-
sensitive letters, digits, special characters (including ~ ! @ # $ % ^ & * ( ) - _ + = { } [ ] | \ : ; " ' < > , .
/), spaces, and other Unicode characters and symbols.
Each Unicode character takes the space of two regular characters.
To use Unicode characters or symbols in an interface description, install the specific input method editor
and log in to the switch through remote login software that supports the character type.
When the length of a description string reaches or exceeds the maximum line width on the terminal
software, the software starts a new line, possibly breaking a Unicode character into two. As a result,
garbled characters may be displayed at the end of a line.
Example
# Change the description of interface GigabitEthernet 1/0/1 to lanswitch-interface.
<Sysname> system-view
[Sysname] interface gigabitethernet 1/0/1
[Sysname-GigabitEthernet1/0/1] description lanswitch-interface
display counters
Description
Use the display counters command to display traffic statistics for interfaces.
If an interface type is specified, this command displays traffic statistics for all interfaces of the specified
type.
If no interface type is specified, this command displays traffic statistics for all interfaces that have traffic
counters.
Syntax
display counters {inbound |outbound } interface [ interface-type ] [ |{ begin | exclude | include }
regular-expression ]
View
Any view

3
Default level
1: Monitor level
Parameters
inbound: Displays inbound traffic statistics.
outbound: Displays outbound traffic statistics.
interface-type: Specifies an interface type.
|: Filters command output by specifying a regular expression. For more information about regular
expressions, see Fundamentals Configuration Guide.
begin: Displays the first line that matches the specified regular expression and all lines that follow.
exclude: Displays all lines that do not match the specified regular expression.
include: Displays all lines that match the specified regular expression.
regular-expression: Specifies a regular expression, a case-sensitive string of 1 to 256 characters.
Example
# Display inbound traffic statistics for all GigabitEthernet interfaces.
<Sysname> display counters inbound interface gigabitethernet
Interface Total(pkts) Broadcast(pkts) Multicast(pkts) Err(pkts)
GE1/0/1 100 100 0 0
GE1/0/2 0 0 0 0
GE1/0/3 Overflow Overflow Overflow Overflow
GE1/0/4 0 0 0 0
Overflow: more than 14 decimal digits(7 digits for column "Err").
--: not supported.
Table 1 Command output
Field
Description
Interface
Abbreviated interface name
Total (pkts)
Total number of packets received or sent through the interface
Broadcast (pkts)
Total number of broadcast packets received or sent through the interface
Multicast (pkts)
Total number of multicast packets received or sent through the interface
Err (pkts)
Total number of error packets received or sent through the interface
Overflow: more than 14
decimal digits(7 digits for
column "Err").
The command displays Overflow, if any of the following applies:
The data length of an error statistic is greater than 7 decimal digits
The data length of a non-error statistic is greater than 14 decimal digits
--: not supported.
The statistical item is not supported
display counters rate
Description
Use the display counters rate command to display traffic rate statistics over the last sampling interval.

4
The statistics cover only interfaces in the up state. If an interface type is specified, the command displays
traffic rate statistics for all up interfaces of the specified type. If no interface type is specified, the
command displays traffic rate statistics for all up interfaces that have traffic counters.
To set the statistics polling interval, use the flow-interval command. The default statistics polling interval is
five minutes.
Related commands: flow-interval.
Syntax
display counters rate {inbound |outbound }interface [ interface-type ] [ |{ begin | exclude | include }
regular-expression ]
View
Any view
Default level
1: Monitor level
Parameters
inbound: Displays inbound traffic rate statistics.
outbound: Displays outbound traffic rate statistics.
interface-type: Specifies an interface type.
|: Filters command output by specifying a regular expression. For more information about regular
expressions, see Fundamentals Configuration Guide.
begin: Displays the first line that matches the specified regular expression and all lines that follow.
exclude: Displays all lines that do not match the specified regular expression.
include: Displays all lines that match the specified regular expression.
regular-expression: Specifies a regular expression, a case-sensitive string of 1 to 256 characters.
Example
# Display the inbound traffic rate statistics for all GigabitEthernet interfaces.
<Sysname> display counters rate inbound interface gigabitethernet
Interface Total(pkts/sec) Broadcast(pkts/sec) Multicast(pkts/sec)
GE1/0/1 0 -- --
Overflow: more than 14 decimal digits.
--: not supported.
Table 2 Command output
Field
Description
Interface
Abbreviated interface name
Total (pkts/sec)
Average rate (in packets per second) of receiving or sending packets during
the sampling interval
Broadcast (pkts/sec)
Average rate (packets per second) of receiving or sending broadcast
packets during the sampling interval

5
Field
Description
Multicast (pkts/sec)
Average rate (packets per second) of receiving or sending multicast packets
during the sampling interval
Overflow: more than 14
decimal digits.
The command displays Overflow, if any of the following applies:
The data length of an error statistic is greater than 7 decimal digits
The data length of a non-error statistic is greater than 14 decimal digits
--: not supported.
The statistical item is not supported
display interface
Description
Use the display interface command to display Ethernet interface information.
If no interface type is specified, this command displays information about all interfaces.
If an interface type is specified but no interface number is specified, this command displays information
about all interfaces of that type.
Related commands: interface.
Syntax
display interface [ interface-type ] [ brief [ down ] ] [ |{ begin | exclude | include } regular-expression ]
display interface interface-type interface-number [ brief ] [ |{ begin | exclude | include } regular-
expression ]
View
Any view
Default level
1: Monitor level
Parameters
interface-type interface-number: Specifies an interface type and number.
brief: Displays brief interface information. If you do not specify this parameter, the command displays
detailed interface information.
down: Displays information about interfaces in the down state and the causes. If you do not specify this
parameter, this command displays information about interfaces in all states.
|: Filters command output by specifying a regular expression. For more information about regular
expressions, see Fundamentals Configuration Guide.
begin: Displays the first line that matches the specified regular expression and all lines that follow.
exclude: Displays all lines that do not match the specified regular expression.
include: Displays all lines that match the specified regular expression.
regular-expression: Specifies a regular expression, a case-sensitive string of 1 to 256 characters.
Examples
# Display information about Layer 3 interface GigabitEthernet 1/0/1.
<Sysname>display interface gigabitethernet 1/0/1

6
GigabitEthernet1/0/1 current state: DOWN
Line protocol current state: DOWN
Description: GigabitEthernet1/0/1 Interface
The Maximum Transmit Unit is 1500
Internet protocol processing : disabled
IP Packet Frame Type: PKTFMT_ETHNT_2, Hardware Address: 3ce5-a6df-e139
IPv6 Packet Frame Type: PKTFMT_ETHNT_2, Hardware Address: 3ce5-a6df-e139
Media type is twisted pair
Port hardware type is 1000_BASE_T
Port priority: 0
Output queue: Strict-priority queue
Unknown-speed mode, unknown-duplex mode
Link speed type is autonegotiation, link duplex type is autonegotiation
Flow-control is not enabled
The Maximum Frame Length is 9216
Peak value of input: 0 bytes/sec, at 2011-05-28 10:01:36
Peak value of output: 0 bytes/sec, at 2011-05-28 10:01:36
Last 300 seconds input: 0 packets/sec 0 bytes/sec
Last 300 seconds output: 0 packets/sec 0 bytes/sec
Input (total): 0 packets, 0 bytes
0 unicasts, 0 broadcasts, 0 multicasts, 0 pauses
Input (normal): 0 packets, - bytes
0 unicasts, 0 broadcasts, 0 multicasts, 0 pauses
Input: 0 input errors, 0 runts, 0 giants, 0 throttles
0 CRC, 0 frame, - overruns, 0 aborts
- ignored, - parity errors
Output (total): 0 packets, 0 bytes
0 unicasts, 0 broadcasts, 0 multicasts, 0 pauses
Output (normal): 0 packets, - bytes
0 unicasts, 0 broadcasts, 0 multicasts, 0 pauses
Output: 0 output errors, - underruns, - buffer failures
0 aborts, 0 deferred, 0 collisions, 0 late collisions
0 lost carrier, - no carrier
Table 3 Display interface command (in route mode) output description
Field
Description
GigabitEthernet1/0/1 current
state
State of the Ethernet interface:
DOWN (Administratively)—Ethernet interface was shut down with the
shutdown command. The interface is down administratively.
DOWN (Link-Aggregation interface down)—Ethernet interface is down
physically because the aggregate interface corresponding to the
aggregation group to which the Ethernet interface belongs was shut
down with the shutdown command.
DOWN—Ethernet interface is up administratively, but down physically
(possibly because no physical link is present or the link has failed).
UP—Ethernet interface is up both administratively and physically.

7
Field
Description
Line protocol current state
Link layer state of the interface:
DOWN—Interface is down physically.
UP—Interface is up physically.
Description
Description of the Ethernet interface.
Internet protocol processing
Disabled indicates that IP packets cannot be processed.
For an interface configured with an IP address, this field changes to
Internet Address is.
Media type is
Physical medium, twisted pair or optical fiber.
loopback not set
Loopback testing function is disabled.
For an interface configured with the loopback external or loopback
internal command, this field changes to loopback is set.
promiscuous mode not set
Interface operates in non-promiscuous mode.
Output queue (Urgent queue:
Size/Length/Discards)
Output queue (current message number in the urgent queue, maximum
number of messages allowed in the urgent queue, and number of
discarded messages).
Output queue (Protocol queue:
Size/Length/Discards)
Output queue (current message number in the protocol queue, maximum
number of messages allowed in the protocol queue, and number of
discarded messages).
Output queue (FIFO queuing:
Size/Length/Discards)
Output queue (current message number in the FIFO queue, maximum
number of messages allowed in the FIFO queue, and number of
discarded messages).
Last clearing of counters
Time when the reset counters interface command was last used to clear
the interface statistics. Never indicates the reset counters interface
command was never used on the interface since the switch was started.
Last 300 seconds input rate
Average input rate over the last 300 seconds in Bps, bps, and pps.
Last 300 seconds output rate
Average output rate over the last 300 seconds in Bps, bps, and pps.
Input
Input packets.
Output
Output packets.
# Display detailed information about Layer 2 interface GigabitEthernet 1/0/1.
<Sysname> display interface gigabitethernet 1/0/1
GigabitEthernet1/0/1 current state: DOWN
IP Packet Frame Type: PKTFMT_ETHNT_2, Hardware Address: 3ce5-a6df-e142
Description: GigabitEthernet1/0/1 Interface
Loopback is not set
Media type is twisted pair
Port hardware type is 1000_BASE_T
Unknown-speed mode, unknown-duplex mode
Link speed type is autonegotiation, link duplex type is autonegotiation
The Maximum Frame Length is 9216
Broadcast MAX-ratio: 100%
Unicast MAX-ratio: 100%
Multicast MAX-ratio: 100%
Allow jumbo frame to pass

8
PVID: 1
Mdi type: auto
Port link-type: access
Tagged VLAN ID : none
Untagged VLAN ID : 1
Port priority: 0
Last clearing of counters: Never
Peak value of input: 0 bytes/sec, at 2011-05-28 10:02:36
Peak value of output: 0 bytes/sec, at 2011-05-28 10:02:36
Last 300 seconds input: 0 packets/sec 0 bytes/sec -%
Last 300 seconds output: 0 packets/sec 0 bytes/sec -%
Input (total): 0 packets, 0 bytes
0 unicasts, 0 broadcasts, 0 multicasts, 0 pauses
Input (normal): 0 packets, - bytes
0 unicasts, 0 broadcasts, 0 multicasts, 0 pauses
Input: 0 input errors, 0 runts, 0 giants, 0 throttles
0 CRC, 0 frame, - overruns, 0 aborts
- ignored, - parity errors
Output (total): 0 packets, 0 bytes
0 unicasts, 0 broadcasts, 0 multicasts, 0 pauses
Output (normal): 0 packets, - bytes
0 unicasts, 0 broadcasts, 0 multicasts, 0 pauses
Output: 0 output errors, - underruns, - buffer failures
0 aborts, 0 deferred, 0 collisions, 0 late collisions
0 lost carrier, - no carrier
Table 4 display interface command (in bridge mode) output description
Field
Description
GigabitEthernet1/0/1 current state
Physical state of the Ethernet interface. For more information, see
Table 5.
IP Packet Frame Type
Ethernet framing format on the interface.
Hardware address
Hardware address of the port.
Description
Description of the interface.
Loopback is not set
Loopback testing function is disabled.
Unknown-speed mode
Port speed is unknown.
unknown-duplex mode
Duplex mode is unknown.
Link speed type is autonegotiation
Interface will negotiate a speed with its peer.
link duplex type is autonegotiation
Interface will negotiate a duplex mode with its peer.
The Maximum Frame Length
Maximum Ethernet frame length allowed on the interface.
Broadcast MAX-ratio
Broadcast suppression threshold as a percentage of the interface
transmission capability. When the threshold is exceeded, the
interface drops broadcast packets.
Unicast MAX-ratio
Unknown unicast suppression threshold as a percentage of the
interface transmission capability. When the threshold is exceeded,
the interface drops unknown unicast packets.

9
Field
Description
Multicast MAX-ratio
Multicast suppression threshold as a percentage of the interface
transmission capability. When the threshold is exceeded, the
interface drops multicast packets.
Allow jumbo frame to pass
Maximum length of Ethernet frames that are allowed to pass through
the interface.
PVID
Port VLAN ID.
Mdi type
Cable type.
Port link-type
Link type of the interface, which could be access, trunk, or hybrid.
Tagged VLAN ID
VLANs for which the interface sends packets without removing VLAN
tags.
Untagged VLAN ID
VLANs for which the interface sends packets after removing VLAN
tags.
Peak value of input
Peak value of inbound traffic, in Bps.
Peak value of output
Peak value of outbound traffic, in Bps.
Last 300 seconds input: 0
packets/sec 0 bytes/sec
Last 300 seconds output: 0
packets/sec 0 bytes/sec
Average rate of input and output traffic in the last 300 seconds, in
pps and Bps.
Input (total): 0 packets, 0 bytes
0 unicasts, 0 broadcasts, 0
multicasts, 0 pauses
Inbound traffic statistics (in packets and bytes) for the interface. All
inbound normal and abnormal packets (including unicast,
broadcast, and multicast), and pause frames were counted.
Input (normal): 0 packets, - bytes
0 unicasts, 0 broadcasts, 0
multicasts, 0 pauses
Inbound traffic statistics (in packets and bytes) for the interface. All
inbound normal packets (including unicast, broadcast, and
multicast), and pause frames were counted.
input errors
Inbound packets with errors.
runts
Inbound frames shorter than 64 bytes, in correct format, and
containing valid CRCs.
giants
Inbound frames larger than the maximum frame length supported on
the interface.
For an Ethernet interface that does not permit jumbo frames, giants
refer to frames larger than 1536 bytes (without VLAN tags) or 1540
bytes (with VLAN tags).
For an Ethernet interface that permits jumbo frames, giants refer to
frames larger than the maximum length of Ethernet frames that are
allowed to pass through, which is configured when you configure
jumbo frame support on the interface.
- throttles
The number of times that the port shut down due to buffer or CPU
overload.
frame
Total number of inbound frames that contained checksum errors and
a non-integer number of bytes.
- overruns
Number of packet drops because the input rate of the port exceeded
the queuing capability.

10
Field
Description
aborts
Total number of illegal inbound packets:
Fragment frames—CRC error frames shorter than 64 bytes. The
length can be an integral or non-integral value.
Jabber frames—CRC error frames greater than the maximum frame
length supported on the Ethernet interface (with an integral or non-
integral length). For an Ethernet interface that does not permit jumbo
frames, jabber frames refer to CRC error frames greater than 1518
bytes (without VLAN tags) or 1522 bytes (with VLAN tags). For an
Ethernet interface that permits jumbo frames, jabber frames refer to
CRC error frames greater than the maximum length of Ethernet
frames that are allowed to pass through the interface (which is
configured when you configure jumbo frame support on the
interface).
Symbol error frames—Frames that contained at least one undefined
symbol.
Unknown operation code frames—Non-pause MAC control frames
Length error frames—Frames whose 802.3 length fields did not
accord with the actual frame length (46 to 1500 bytes).
ignored
Number of inbound frames dropped because the receive buffer of
the port ran low.
- parity errors
Total number of frames with parity errors.
Output (total): 1502 packets,
138924 bytes
- unicasts, 2 broadcasts, 406
multicasts, 0 pauses
Outbound traffic statistics (in packets and bytes) for the port. All
outbound normal and abnormal packets (including unicast,
broadcast, and multicast), and pause frames were counted.
Output (normal): - packets, - bytes
1094 unicasts, - broadcasts, -
multicasts, - pauses
Outbound normal traffic (including unicast, broadcast, and multicast)
and pause frame statistics (in packets and bytes) for the interface.
output errors
Outbound packets with errors.
- underruns
Number of packet drops because the output rate of the interface
exceeded the output queuing capability. This is a low-probability
hardware anomaly.
- buffer failures
Number of packets dropped because the transmit buffer of the
interface ran low.
aborts
Number of packets that failed to be transmitted, for example,
because of Ethernet collisions.
deferred
Number of frames that the interface deferred to transmit because of
detected collisions.
collisions
Number of frames that the interface stopped transmitting because
Ethernet collisions were detected during transmission.
late collisions
Number of frames that the interface deferred to transmit after
transmitting their first 512 bits, because of detected collisions.
lost carrier
Number of carrier losses during transmission. This counter applies to
serial WAN interfaces.

11
Field
Description
- no carrier
Number of times that the port failed to detect the carrier when
attempting to send frames. This counter applies to serial WAN
interfaces.
NOTE:
If an output field is not available, a hyphen (-) is displayed.
Table 5 Description on the possible physical states of a Layer 2 Ethernet interface
Field
Description
UP
Interface is up physically.
DOWN
Interface is down physically because no physical connection exists. Possible
reason: The network cable is disconnected or faulty.
DOWN (Administratively)
Interface is down physically because it was shut down with the shutdown
command. To restore its physical state, use the undo shutdown command.
DOWN (Link-Aggregation
interface down)
Interface is down physically because the aggregate interface corresponding
to the aggregation group to which it belongs was shut down with the
shutdown command.
DOWN ( OAM connection
failure )
Interface is down physically because an OAM connection fails to be
established on it or the OAM connection is disconnected.
DOWN ( DLDP connection
failure )
Interface is down physically because a DLDP connection fails to be
established on it or the DLDP connection is disconnected.
DOWN ( Loopback
detection-protected )
Interface is shut down because a loop is detected on it.
DOWN ( BPDU-protected )
Interface is shut down by the BPDU guard function.
DOWN ( Monitor-Link uplink
down )
Interface is down physically because the uplink of the monitor link group to
which it belongs is down.
# Display brief information about all interfaces.
<Sysname> display interface brief
The brief information of interface(s) under route mode:
Link: ADM - administratively down; Stby - standby
Protocol: (s) - spoofing
Interface Link Protocol Main IP Description
M-GE0/0/0 DOWN DOWN --
NULL0 UP UP(s) --
Vlan1 UP UP 192.168.0.59
The brief information of interface(s) under bridge mode:
Link: ADM - administratively down; Stby - standby
Speed or Duplex: (a)/A - auto; H - half; F - full
Type: A - access; T - trunk; H - hybrid
Interface Link Speed Duplex Type PVID Description
GE1/0/2 DOWN auto A A 1

12
GE1/0/3 DOWN auto A A 1
GE1/0/4 DOWN auto A A 1
GE1/0/5 DOWN auto A A 1
GE1/0/6 DOWN auto A A 1
GE1/0/7 DOWN auto A A 1
GE1/0/8 DOWN auto A A 1
GE1/0/9 DOWN auto A A 1
GE1/0/10 DOWN auto A A 1
GE1/0/11 DOWN auto A A 1
# Filter the brief interface information to display the line starting with the (s) string and all subsequent
lines.
<Sysname> display interface brief | begin (s)
The brief information of interface(s) under route mode:
Link: ADM - administratively down; Stby - standby
Protocol: (s) - spoofing
Interface Link Protocol Main IP Description
NULL0 UP UP(s) --
Vlan1 UP UP 192.168.0.59
When you use the begin parameter to filter the output, the system only searches the Layer 3 interface list
or the Layer 2 interface list. If regular-expression is on the Layer 3 interface list, the system only displays
the line that contains regular-expression, and all subsequent lines on the Layer 3 interface list.
<Sysname> display interface brief down
The brief information of interface(s) under route mode:
Link: ADM - administratively down; Stby - standby
Interface Link Cause
M-GE0/0/0 DOWN Not connected
GE1/0/8 DOWN Not connected
The brief information of interface(s) under bridge mode:
Link: ADM - administratively down; Stby - standby
Interface Link Cause
BAGG1 DOWN Not connected
GE1/0/1 DOWN Not connected
GE1/0/2 DOWN Not connected
GE1/0/4 DOWN Not connected
GE1/0/5 DOWN Not connected
Table 6 display interface brief command output description
Field
Description
The brief information of
interfaces under route
mode:
Command displays brief information about Layer 3 interfaces.
Link: ADM -
administratively down;
Stby - standby
ADM—Interface has been shut down by the network administrator. To recover
its physical layer state, perform the undo shutdown command.
Stby—Interface is a standby interface. You can use the display standby state
command to check the corresponding primary interface.

13
Field
Description
Protocol: (s) - spoofing
If the network layer protocol state of an interface is shown as UP, but its link is
an on-demand link or not present at all, its protocol attribute includes the
spoofing flag (an sin parentheses). This attribute is typical of interface Null 0
and the loopback interfaces.
Interface
Interface name.
Link
Physical link state of the interface:
UP—Link is up.
DOWN—Link is down physically.
ADM—Link has been shut down administratively. To recover its physical
state, perform the undo shutdown command.
Stby—Interface is a standby interface.
Protocol
Protocol connection state of the interface, which can be UP, DOWN, or UP(s).
The brief information of
interfaces under bridge
mode:
Brief information about Layer 2 interfaces.
Speed or Duplex: (a)/A -
auto; H - half; F - full
If the speed of an interface is negotiated automatically, its speed attribute
includes the auto negotiation flag, letter a in parentheses.
If the duplex mode of an interface is negotiated automatically, its duplex mode
attribute includes the following options:
(a)/A—Auto negotiation
H—Half negotiation
F—Full negotiation
Type: A - access; T - trunk;
H –hybrid
Link type options for Ethernet interfaces.
Speed
Interface rate, in bps.
Duplex
Duplex mode of the interface:
A—Auto-negotiation
F—Full duplex
F(a)—Auto-negotiated full duplex
H—Half duplex
H(a)—Auto-negotiated half duplex
Type
Link type of the interface:
A—Access
H—Hybrid
T—Trunk
PVID
Port VLAN ID of the interface.
Cause
Causes for the physical state of an interface to be DOWN. For more
information, see Table 7.
Table 7 Causes for the physical state of an interface to be DOWN
Field
Description
Not connected
No physical connection exists (possibly because the network cable is
disconnected or faulty).