HPE FlexNetwork 5510 HI Series User manual

HPE FlexNetwork 5510 HI Switch Series
High Availability
Configuration Guide
Part number: 5200-3629
Software version: Release 13xx
Document version: 6W100-20170315

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Contents
Configuring Ethernet OAM ································································· 1
Overview ·································································································································· 1
Major functions of Ethernet OAM ···························································································· 1
Ethernet OAMPDUs ············································································································· 1
How Ethernet OAM works ····································································································· 1
Protocols and standards ······································································································· 3
Ethernet OAM configuration task list ······························································································ 4
Configuring basic Ethernet OAM functions ······················································································ 4
Configuring the Ethernet OAM connection detection timers ································································· 4
Configuring link monitoring ··········································································································· 5
Configuring errored symbol event detection ·············································································· 5
Configuring errored frame event detection ················································································ 6
Configuring errored frame period event detection ······································································· 7
Configuring errored frame seconds event detection ···································································· 7
Configuring the action a port takes after it receives an Ethernet OAM event from the remote end ················ 8
Configuring Ethernet OAM remote loopback ···················································································· 8
Configuration restrictions and guidelines ·················································································· 9
Enabling Ethernet OAM remote loopback for a port in system view ················································ 9
Enabling Ethernet OAM remote loopback for a port in interface view ·············································· 9
Rejecting the Ethernet OAM remote loopback request from a remote port ····································· 10
Displaying and maintaining Ethernet OAM ····················································································· 10
Ethernet OAM configuration example ··························································································· 10
Network requirements ········································································································ 10
Configuration procedure ····································································································· 11
Configuring CFD ············································································ 13
Overview ································································································································ 13
Basic CFD concepts ·········································································································· 13
CFD functions ··················································································································· 15
EAIS ······························································································································· 17
Protocols and standards ····································································································· 17
CFD configuration task list ········································································································· 17
Configuring basic CFD settings ··································································································· 18
Enabling CFD ··················································································································· 18
Configuring Ethernet service instances ·················································································· 18
Configuring MEPs ············································································································· 19
Configuring MIP auto-generation rules ··················································································· 19
Configuring CFD functions ········································································································· 20
Configuration prerequisites ·································································································· 20
Configuring CC ················································································································· 20
Configuring LB ·················································································································· 21
Configuring LT ·················································································································· 21
Configuring AIS ················································································································· 21
Configuring LM ················································································································· 22
Configuring one-way DM ····································································································· 22
Configuring two-way DM ····································································································· 23
Configuring TST ················································································································ 23
Configuring EAIS ····················································································································· 23
Displaying and maintaining CFD ································································································· 24
CFD configuration example ········································································································ 25
Configuring DLDP ·········································································· 30
Overview ································································································································ 30
Basic concepts ················································································································· 31
How DLDP works ·············································································································· 32
Configuration restrictions and guidelines ······················································································· 34
DLDP configuration task list ······································································································· 34

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Enabling DLDP ························································································································ 34
Setting the interval to send advertisement packets ·········································································· 35
Setting the DelayDown timer ······································································································ 35
Setting the port shutdown mode ·································································································· 35
Configuring DLDP authentication ································································································· 36
Displaying and maintaining DLDP ································································································ 36
DLDP configuration examples ····································································································· 37
Configuring the auto port shutdown mode ··············································································· 37
Configuring the manual port shutdown mode ··········································································· 40
Configuring the hybrid port shutdown mode ············································································ 44
Configuring RRPP ·········································································· 48
Overview ································································································································ 48
Basic RRPP concepts ········································································································ 48
RRPPDUs ······················································································································· 50
RRPP timers ···················································································································· 51
How RRPP works ·············································································································· 51
Typical RRPP networking ···································································································· 52
Protocols and standards ····································································································· 55
RRPP configuration task list ······································································································· 56
Creating an RRPP domain ········································································································· 56
Configuring control VLANs ········································································································· 56
Configuring protected VLANs ····································································································· 57
Configuring RRPP rings ············································································································ 58
Configuring RRPP ports ······································································································ 58
Configuring RRPP nodes ···································································································· 59
Activating an RRPP domain ······································································································· 60
Configuring RRPP timers ··········································································································· 61
Configuring an RRPP ring group ································································································· 61
Enabling SNMP notifications for RRPP ························································································· 62
Displaying and maintaining RRPP ······························································································· 62
RRPP configuration examples ···································································································· 62
Single ring configuration example ························································································· 62
Intersecting ring configuration example ·················································································· 65
Dual-homed rings configuration example ················································································ 71
Load-balanced intersecting-ring configuration example ······························································ 81
Troubleshooting RRPP ·············································································································· 91
Configuring ERPS ·········································································· 92
Overview ································································································································ 92
ERPS structure ················································································································· 92
ERPS protocol packets ······································································································· 93
ERPS node states ············································································································· 94
ERPS timers ···················································································································· 94
ERPS operation mechanism ································································································ 95
ERPS network diagrams ····································································································· 97
Protocols and standards ····································································································· 99
ERPS configuration task list ······································································································· 99
Configuration prerequisites ······································································································ 100
Enabling ERPS globally ··········································································································· 100
Enabling flush packet transparent transmission ············································································ 101
Configuring an ERPS ring ········································································································ 101
Enabling R-APS packets to carry the ring ID in the destination MAC address ······································ 101
Configuring ERPS ring member ports ························································································· 101
Configuring ERPS ring member port attributes ······································································· 102
Configuring an ERPS ring member port ················································································ 102
Configuring control VLANs ······································································································· 103
Configuring protected VLANs ··································································································· 103
Configuring the node role ········································································································· 104
Enabling ERPS for an instance ································································································· 104
Configuring R-APS packet levels ······························································································· 105
Setting ERPS timers ··············································································································· 105

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Setting the non-revertive mode ································································································· 105
Setting the MS mode ·············································································································· 106
Setting the FS mode ··············································································································· 106
Associating a ring with a subring ······························································································· 106
Associating an ERPS ring member port with a track entry ······························································· 107
Removing the MS mode and FS mode settings for an ERPS ring ····················································· 107
Displaying and maintaining ERPS ····························································································· 107
ERPS configuration examples ·································································································· 108
One-ring configuration example ·························································································· 108
One-subring configuration example ····················································································· 116
One-ring multi-instance load balancing configuration example ·················································· 130
Troubleshooting ERPS ············································································································ 140
Configuring Smart Link ·································································· 141
Overview ······························································································································ 141
Terminology ··················································································································· 142
How Smart Link works ······································································································ 142
Smart Link collaboration mechanisms ·················································································· 143
Smart Link configuration task list ······························································································· 144
Configuring a Smart Link device ································································································ 144
Configuration prerequisites ································································································ 144
Configuring protected VLANs for a smart link group ································································ 144
Configuring member ports for a smart link group ···································································· 145
Configuring a preemption mode for a smart link group ····························································· 146
Enabling the sending of flush messages ··············································································· 146
Configuring collaboration between Smart Link and Track ························································· 146
Configuring an associated device ······························································································ 147
Configuration prerequisites ································································································ 147
Enabling the receiving of flush messages ············································································· 147
Displaying and maintaining Smart Link ······················································································· 148
Smart Link configuration examples ···························································································· 148
Single smart link group configuration example ······································································· 148
Multiple smart link groups load sharing configuration example ·················································· 153
Smart Link and Track collaboration configuration example ······················································· 157
Configuring Monitor Link ································································ 163
Overview ······························································································································ 163
Configuration restrictions and guidelines ····················································································· 164
Monitor Link configuration task list ····························································································· 164
Enabling Monitor Link globally ·································································································· 164
Creating a monitor link group ···································································································· 164
Configuring monitor link group member interfaces ········································································· 165
Configuring the uplink interface threshold for triggering monitor link group state switchover ··················· 166
Configuring the switchover delay for the downlink interfaces in a monitor link group ····························· 166
Displaying and maintaining Monitor Link ····················································································· 166
Monitor Link configuration example ···························································································· 166
Configuring VRRP ········································································ 171
Overview ······························································································································ 171
VRRP standard mode ············································································································· 172
Router priority in a VRRP group ························································································· 172
Preemption ···················································································································· 172
Authentication method ······································································································ 172
VRRP timers ·················································································································· 173
Master election ··············································································································· 173
VRRP tracking ················································································································ 174
VRRP application ············································································································ 174
VRRP load balancing mode ····································································································· 176
Virtual MAC address assignment ························································································ 176
Virtual forwarder ·············································································································· 178
Protocols and standards ·········································································································· 180
Configuring IPv4 VRRP ··········································································································· 180

iv
IPv4 VRRP configuration task list ························································································ 180
Specifying an IPv4 VRRP operating mode ············································································ 180
Specifying the IPv4 VRRP version ······················································································ 181
Creating a VRRP group and assigning a virtual IP address ······················································ 181
Configuring the router priority, preemptive mode, and tracking function ······································· 182
Configuring IPv4 VRRP packet attributes ·············································································· 183
Configuring VF tracking ···································································································· 184
Enabling SNMP notifications for VRRP ················································································ 184
Disabling an IPv4 VRRP group ··························································································· 184
Displaying and maintaining IPv4 VRRP ················································································ 185
Configuring IPv6 VRRP ··········································································································· 185
IPv6 VRRP configuration task list ························································································ 185
Specifying an IPv6 VRRP operating mode ············································································ 185
Creating a VRRP group and assigning a virtual IPv6 address ··················································· 186
Configuring the router priority, preemptive mode, and tracking function ······································· 187
Configuring VF tracking ···································································································· 187
Configuring IPv6 VRRP packet attributes ·············································································· 188
Disabling an IPv6 VRRP group ··························································································· 189
Displaying and maintaining IPv6 VRRP ················································································ 189
IPv4 VRRP configuration examples ··························································································· 189
Single VRRP group configuration example ············································································ 189
Multiple VRRP groups configuration example ········································································ 192
VRRP load balancing configuration example ········································································· 195
IPv6 VRRP configuration examples ··························································································· 203
Single VRRP group configuration example ············································································ 203
Multiple VRRP groups configuration example ········································································ 206
VRRP load balancing configuration example ········································································· 209
Troubleshooting VRRP ············································································································ 217
An error prompt is displayed ······························································································ 217
Multiple masters appear in a VRRP group ············································································ 218
Fast VRRP state flapping ·································································································· 218
Configuring BFD ·········································································· 219
Overview ······························································································································ 219
BFD session establishment and termination ·········································································· 219
BFD session modes and operating modes ············································································ 219
Supported features ·········································································································· 220
Protocols and standards ··································································································· 221
Configuring BFD basic functions ······························································································· 221
Configuring echo packet mode ··························································································· 221
Configuring control packet mode ························································································ 222
Configuring a BFD template ····································································································· 224
Enabling SNMP notifications for BFD ························································································· 224
Displaying and maintaining BFD ································································································ 224
Configuring Track ········································································· 225
Overview ······························································································································ 225
Collaboration fundamentals ······························································································· 225
Collaboration application example ······················································································· 226
Track configuration task list ······································································································ 226
Associating the Track module with a detection module ··································································· 227
Associating Track with NQA ······························································································ 227
Associating Track with BFD ······························································································· 227
Associating Track with CFD ······························································································· 228
Associating Track with interface management ······································································· 228
Associating Track with route management ············································································ 229
Associating Track with LLDP ····························································································· 229
Associating the Track module with an application module ······························································· 230
Associating Track with VRRP ····························································································· 230
Associating Track with static routing ···················································································· 231
Associating Track with PBR ······························································································· 233
Associating Track with Smart Link ······················································································· 234

v
Associating Track with VPLS ····························································································· 235
Associating Track with MPLS L2VPN ··················································································· 235
Associating Track with EAA ······························································································· 237
Associating Track with ERPS ····························································································· 238
Displaying and maintaining track entries ····················································································· 238
Track configuration examples ··································································································· 238
VRRP-Track-NQA collaboration configuration example ··························································· 238
Configuring BFD for a VRRP backup to monitor the master ······················································ 242
Configuring BFD for the VRRP master to monitor the uplinks ···················································· 245
Static routing-Track-NQA collaboration configuration example ·················································· 248
Static routing-Track-BFD collaboration configuration example ··················································· 252
VRRP-Track-interface management collaboration configuration example ···································· 256
VRRP-Track-route management collaboration configuration example ········································· 258
Static routing-Track-LLDP collaboration configuration example ················································· 261
Smart Link-Track-CFD collaboration configuration example ······················································ 264
Configuring process placement ······················································· 265
Overview ······························································································································ 265
Process ························································································································· 265
1:N process redundancy ··································································································· 265
Process placement policy and optimization ··········································································· 265
Configuration restrictions and guidelines ····················································································· 266
Process placement configuration task list ···················································································· 266
Configuring process placement policy ························································································ 267
Configuring a location affinity ····························································································· 267
Configuring a location type affinity ······················································································· 267
Configuring a process affinity ····························································································· 268
Configuring a self affinity ··································································································· 268
Optimizing process placement ·································································································· 268
Displaying process placement ·································································································· 269
Document conventions and icons ···················································· 270
Conventions ························································································································· 270
Network topology icons ··········································································································· 271
Support and other resources ·························································· 272
Accessing Hewlett Packard Enterprise Support ············································································ 272
Accessing updates ················································································································· 272
Websites ······················································································································· 273
Customer self repair ········································································································· 273
Remote support ·············································································································· 273
Documentation feedback ·································································································· 273
Index ························································································· 275

1
Configuring Ethernet OAM
Overview
Ethernet Operation, Administration, and Maintenance (OAM) is a tool that monitors Layer 2 link
status and addresses common link-related issues on the "last mile." Ethernet OAM improves
Ethernet management and maintainability. You can use it to monitor the status of the point-to-point
link between two directly connected devices.
Major functions of Ethernet OAM
Ethernet OAM provides the following functions:
•Link performance monitoring—Monitors the performance indices of a link, including packet
loss, delay, and jitter, and collects traffic statistics of various types.
•Fault detection and alarm—Checks the connectivity of a link by sending OAM protocol data
units (OAMPDUs) and reports to the network administrators when a link error occurs.
•Remote loopback—Checks link quality and locates link errors by looping back OAMPDUs.
Ethernet OAMPDUs
Ethernet OAM operates on the data link layer. Ethernet OAM reports the link status by periodically
exchanging OAMPDUs between devices, so that the administrator can effectively manage the
network.
Ethernet OAMPDUs include the following types shown in Table 1.
Table 1 Functions of different types of OAMPDUs
OAMPDU type
Function
Information OAMPDU
Used for transmitting state information of an Ethernet OAM entity, including the
information about the local device and remote devices, and customized
information, to the remote Ethernet OAM entity, and maintaining OAM
connections.
Event Notification
OAMPDU
Used by link monitoring to notify the remote OAM entity when it detects problems
on the link in between.
Loopback Control
OAMPDU
Used for remote loopback control. By inserting the information used to
enable/disable loopback to a loopback control OAMPDU, you can enable/disable
loopback on a remote OAM entity.
NOTE:
Throughout this document, an Ethernet OAM
-enabled port is called an Ethernet OAM entity or an
OAM entity.
How Ethernet OAM works
This section describes the working procedures of Ethernet OAM.

2
Ethernet OAM connection establishment
Ethernet OAM connection is the basis of all the other Ethernet OAM functions. OAM connection
establishment is also known as the Discovery phase, where an Ethernet OAM entity discovers the
remote OAM entity to establish a session.
In this phase, two connected OAM entities exchange Information OAMPDUs to advertise their OAM
configuration and capabilities to each other for a comparison. If their Loopback, link detection, and
link event settings match, the OAM entities establish an OAM connection.
An OAM entity operates in active mode or passive mode. OAM entities in active mode initiate OAM
connections, and OAM entities in passive mode wait and respond to the OAM connection requests.
To set up an OAM connection between two OAM entities, you must set at least one entity to operate
in active mode.
Table 2 shows the actions that a device can perform in different modes.
Table 2 Active Ethernet OAM mode and passive Ethernet OAM mode
Item Active Ethernet OAM mode Passive Ethernet OAM
mode
Initiating OAM Discovery Available Unavailable
Responding to OAM Discovery Available Available
Transmitting Information
OAMPDUs Available Available
Transmitting Event Notification
OAMPDUs Available Available
Transmitting Information
OAMPDUs without any TLV Available Available
Transmitting Loopback Control
OAMPDUs Available Unavailable
Responding to Loopback Control
OAMPDUs
Available when both sides are
operating in active OAM mode Available
After an Ethernet OAM connection is established, the Ethernet OAM entities exchange Information
OAMPDUs at the handshake packet transmission interval to detect the availability of the Ethernet
OAM connection. If an Ethernet OAM entity receives no Information OAMPDU within the Ethernet
OAM connection timeout time, the Ethernet OAM connection is considered disconnected.
Link monitoring
Error detection in an Ethernet is difficult, especially when the physical connection in the network is
not disconnected, but network performance is degrading gradually.
Link monitoring detects link faults in various environments. Ethernet OAM entities monitor link status
by exchanging Event Notification OAMPDUs. When detecting one of the link error events listed in
Table 3, an OAM entity sends an Event Notification OAMPDU to its peer OAM entity. The network
administrator can keep track of network status changes by retrieving the log.
Table 3 Ethernet OAM link error events
Ethernet OAM link events
Description
Errored symbol event
An errored symbol event occurs when the number of detected symbol
errors in the detection window (specified number of received symbols)
exceeds the predefined threshold.
Errored frame event
An errored frame event occurs when the number of detected error frames
in the detection window (specified detection interval) exceeds the
predefined threshold.

3
Ethernet OAM link events
Description
Errored frame period event
An errored frame period event occurs when the number of frame errors in
the detection window (specified number of received frames) exceeds the
predefined threshold.
Errored frame seconds event
An errored frame seconds event occurs when the number of errored
frame seconds (the second in which an errored frame appears is called an
errored frame second) detected on a port in the detection window
(specified detection interval) reaches the predefined threshold.
Remote fault detection
Information OAMPDUs are exchanged periodically among Ethernet OAM entities across established
OAM connections. When traffic is interrupted due to device failure or unavailability, the Ethernet
OAM entity at the faulty end sends error information to its peer. The Ethernet OAM entity uses the
flag field in Information OAMPDUs to indicate the error information (any critical link event type as
shown in Table 4). You can use the log information to track ongoing link status and troubleshoot
problems promptly.
Table 4 Critical link events
Type Description OAMPDU transmission
frequencies
Link Fault Peer link signal is lost. Once per second.
Dying Gasp An unexpected fault, such as power failure,
occurred. Non-stop.
Critical Event An undetermined critical event happened. Non-stop.
The switch can receive and send OAMPDUs carrying the critical link events as follows:
•Receive Information OAMPDUs carrying the critical link events listed in Table 4.
•Send Information OAMPDUs carrying Link Fault events.
•Send Information OAMPDUs carrying Dying Gasp events when the device is rebooted or
relevant ports are manually shut down. Physical IRF ports, however, are unable to send this
type of OAMPDUs.
•Do not support sending Information OAMPDUs carrying Critical Events.
Remote loopback
Remote loopback is available only after the Ethernet OAM connection is established. With remote
loopback enabled, the Ethernet OAM entity in active mode sends non-OAMPDUs to its peer. After
receiving these frames, the peer does not forward them according to their destination addresses.
Instead, it returns them to the sender along the original path.
Remote loopback enables you to check the link status and locate link failures. Performing remote
loopback periodically helps to detect network faults promptly. Furthermore, performing remote
loopback by network segments helps to locate network faults.
Protocols and standards
IEEE 802.3ah, Carrier Sense Multiple Access with Collision Detection (CSMA/CD) Access Method
and Physical Layer Specifications

4
Ethernet OAM configuration task list
Tasks at a glance
(Required.) Configuring basic Ethernet OAM functions
(Optional.) Configuring the Ethernet OAM connection detection timers
(Optional.) Configuring link monitoring
• Configuring errored symbol event detection
• Configuring errored frame event detection
• Configuring errored frame period event detection
• Configuring errored frame seconds event detection
(Optional.) Configuring the action a port takes after it receives an Ethernet OAM event from the remote end
(Optional.) Configuring Ethernet OAM remote loopback
• Enabling Ethernet OAM remote loopback for a port in system view
• Enabling Ethernet OAM remote loopback for a port in interface view
• Rejecting the Ethernet OAM remote loopback request from a remote port
Configuring basic Ethernet OAM functions
To set up an Ethernet OAM connection between two Ethernet OAM entities, you must set at least
one entity to operate in active mode. An Ethernet OAM entity can initiate OAM connection only in
active mode.
To change the Ethernet OAM mode on an Ethernet OAM-enabled port, first disable Ethernet OAM on
the port.
To configure basic Ethernet OAM functions:
Step
Command
Remarks
1. Enter system view. System-view N/A
2. Enter Layer 2/Layer 3
Ethernet port view. interface interface-type
interface-number N/A
3. Set the Ethernet OAM mode. oam mode { active | passive } The default is active Ethernet
OAM mode.
4. Enable Ethernet OAM. oam enable Ethernet OAM is disabled by
default.
Configuring the Ethernet OAM connection
detection timers
After an Ethernet OAM connection is established, the Ethernet OAM entities exchange Information
OAMPDUs at the handshake packet transmission interval to detect the availability of the Ethernet
OAM connection. If an Ethernet OAM entity receives no Information OAMPDU within the Ethernet
OAM connection timeout time, the Ethernet OAM connection is considered disconnected.
By adjusting the handshake packet transmission interval and the connection timeout timer, you can
change the detection time resolution for Ethernet OAM connections.

5
You can configure this command in system view or port view. The configuration in system view takes
effect on all ports, and the configuration in port view takes effect on the specified port. For a port, the
configuration in port view takes precedence.
After the timeout timer of an Ethernet OAM connection expires, the local OAM entity ages out and
terminates its connection with the peer OAM entity. To keep the Ethernet OAM connections stable,
set the connection timeout timer to be at least five times the handshake packet transmission interval.
To configure the Ethernet OAM connection detection timers globally:
Step
Command
Remarks
1. Enter system view.
System-view
N/A
2. Configure the Ethernet OAM
handshake packet
transmission interval. oam global timer hello interval The default is 1000 milliseconds.
3. Configure the Ethernet OAM
connection timeout timer. oam global timer keepalive
interval The default is 5000 milliseconds.
To configure the Ethernet OAM connection detection timers on a port:
Step
Command
Remarks
1. Enter system view.
System-view
N/A
2. Enter Layer 2/Layer 3
Ethernet port view. interface interface-type
interface-number
N/A
3. Configure the Ethernet OAM
handshake packet
transmission interval. oam timer hello interval By default, an interface uses the
value configured globally.
4. Configure the Ethernet OAM
connection timeout timer. oam timer keepalive interval By default, an interface uses the
value configured globally.
Configuring link monitoring
After Ethernet OAM connections are established, the link monitoring periods and thresholds
configured in this section automatically take effect on all Ethernet ports.
Configuring errored symbol event detection
An errored symbol event occurs when the number of detected symbol errors in the detection window
exceeds the predefined threshold. The detection window refers to the specified number of received
symbols.
You can configure this command in system view or port view. The configuration in system view takes
effect on all ports, and the configuration in port view takes effect on the specified port. For a port, the
configuration in port view takes precedence.
To configure errored symbol event detection globally:
Step
Command
Remarks
1. Enter system view.
system-view
N/A
2. Configure the errored symbol
event detection window.
oam global
errored-symbol-period window
window-value
By default, the errored symbol
event detection window is
100000000.

6
Step
Command
Remarks
3. Configure the errored symbol
event triggering threshold.
oam global
errored-symbol-period
threshold threshold-value
By default, the errored symbol
event triggering threshold is 1.
To configure errored symbol event detection on a port:
Step
Command
Remarks
1. Enter system view. system-view N/A
2. Enter Layer 2/Layer 3
Ethernet port view. interface interface-type
interface-number N/A
3. Configure the errored symbol
event detection window. oam errored-symbol-period
window window-value
By default, an interface uses the
value configured globally.
4. Configure the errored symbol
event triggering threshold. oam errored-symbol-period
threshold
threshold-value
By default, an interface uses the
value configured globally.
Configuring errored frame event detection
An errored frame event occurs when the number of times that error frames in the detection window
are detected exceeds the predefined threshold. The detection window refers to the specified
detection interval.
You can configure this command in system view or port view. The configuration in system view takes
effect on all ports, and the configuration in port view takes effect on the specified port. For a port, the
configuration in port view takes precedence.
To configure errored frame event detection globally:
Step
Command
Remarks
1. Enter system view. system-view N/A
2. Configure the errored frame
event detection window. oam global errored-frame
window window-value
By default, the errored frame
event detection window is 1000
milliseconds.
3. Configure the errored frame
event triggering threshold. oam global errored-frame
threshold threshold-value
By default, the errored frame
event triggering threshold is 1.
To configure errored frame event detection on a port:
Step
Command
Remarks
1. Enter system view. system-view N/A
2. Enter Layer 2/Layer 3
Ethernet port view. interface interface-type
interface-number
N/A
3. Configure the errored frame
event detection window. oam errored-frame window
window-value
By default, an interface uses the
value configured globally.
4. Configure the errored frame
event triggering threshold. oam errored-frame threshold
threshold-value
By default, an interface uses the
value configured globally.

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Configuring errored frame period event detection
An errored frame period event occurs when the number of times that frame errors in the detection
window are detected exceeds the predefined threshold. The detection window refers to the specified
number of received frames.
You can configure this command in system view or port view. The configuration in system view takes
effect on all ports, and the configuration in port view takes effect on the specified port. For a port, the
configuration in port view takes precedence.
To configure errored frame period event detection globally:
Step
Command
Remarks
1. Enter system view. system-view N/A
2. Configure the errored frame
period event detection
window.
oam global
errored-frame-period window
window-value
By default, the errored frame
period event detection window is
10000000.
3. Configure the errored frame
period event triggering
threshold.
oam global
errored-frame-period threshold
threshold-value
By default, the errored frame
period event triggering threshold
is 1.
To configure errored frame period event detection on a port:
Step
Command
Remarks
1. Enter system view.
system-view
N/A
2. Enter Layer 2/Layer 3
Ethernet port view. interface interface-type
interface-number N/A
3. Configure the errored frame
period event detection
window.
oam errored-frame-period
window window-value
By default, an interface uses the
value configured globally.
4. Configure the errored frame
period event triggering
threshold.
oam errored-frame-period
threshold threshold-value
By default, an interface uses the
value configured globally.
Configuring errored frame seconds event detection
CAUTION:
Make sure the errored frame seconds triggering threshold is less than the errored frame seconds
detection window. Otherwise, no errored frame seconds event can be generated.
An errored frame seconds event occurs when the number of times that errored frame seconds are
detected on a port in the detection window exceeds the predefined threshold. The detection window
refers to the specified detection interval
You can configure this command in system view or port view. The configuration in system view takes
effect on all ports, and the configuration in port view takes effect on the specified port. For a port, the
configuration in port view takes precedence.
To configure errored frame seconds event detection globally:
Step
Command
Remarks
1. Enter system view. system-view N/A

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Step
Command
Remarks
2. Configure the errored frame
seconds event detection
window.
oam global
errored-frame-seconds window
window-value
By default, the errored frame
seconds event detection window
is 60000 milliseconds.
3. Configure the errored frame
seconds event triggering
threshold.
oam global
errored-frame-seconds
threshold threshold-value
By default, the errored frame
seconds event triggering
threshold is 1.
To configure errored frame seconds event detection on a port:
Step
Command
Remarks
1. Enter system view.
system-view
N/A
2. Enter Layer 2/Layer 3
Ethernet port view. interface interface-type
interface-number N/A
3. Configure the errored frame
seconds event detection
window.
oam errored-frame-seconds
window window-value
By default, an interface uses the
value configured globally.
4. Configure the errored frame
seconds event triggering
threshold.
oam errored-frame-seconds
threshold threshold-value
By default, an interface uses the
value configured globally.
Configuring the action a port takes after it receives
an Ethernet OAM event from the remote end
This feature enables a port to log events and automatically terminate the OAM connection and set
the link state to down.
To configure the action the port takes after it receives an Ethernet OAM event from the remote end:
Step
Command
Remarks
1. Enter system view.
system-view
N/A
2. Enter Layer 2/Layer 3
Ethernet port view. interface interface-type
interface-number N/A
3. Configure the action the port
takes after it receives an
Ethernet OAM event from the
remote end.
oam remote-failure
{ connection-expired |
critical-event | dying-gasp |
link-fault } action
error-link-down
By default, the port only logs the
Ethernet OAM event it receives
from the remote end.
Configuring Ethernet OAM remote loopback
CAUTION:
U
se this feature with caution, because enabling Ethernet OAM remote loopback impacts other
services.
When you enable Ethernet OAM remote loopback on a port, the port sends Loopback Control
OAMPDUs to a remote port. After receiving the Loopback Control OAMPDUs, the remote port enters
the loopback state. The remote port then returns any packets sent from the local port except

9
OAMPDUs. By observing how many of these packets return, you can calculate the packet loss ratio
on the link and evaluate the link performance.
You can enable Ethernet OAM remote loopback on a specific port in user view, system view, or Layer
2 Ethernet port view. The configuration effects are the same.
Configuration restrictions and guidelines
•Ethernet OAM remote loopback is available only after the Ethernet OAM connection is
established. It can be performed only by Ethernet OAM entities operating in active Ethernet
OAM mode.
•Remote loopback is available only on full-duplex links that support remote loopback at both
ends.
•Ethernet OAM remote loopback must be supported by both the remote port and the sending
port.
•Enabling Ethernet OAM remote loopback interrupts data communications. After Ethernet OAM
remote loopback is disabled, all the ports involved will go down and then come up. Ethernet
OAM remote loopback can be disabled by any of the following events:
 Disabling Ethernet OAM.
 Disabling Ethernet OAM remote loopback.
 Timeout of the Ethernet OAM connection.
•Enabling internal loopback test on a port in remote loopback test can terminate the remote
loopback test. For more information about loopback test, see Layer 2—LAN Switching
Configuration Guide.
Enabling Ethernet OAM remote loopback for a port in system
view
Step
Command
Remarks
1. (Optional.) Enter system
view. system-view N/A
2. Enable Ethernet OAM
remote loopback for a port.
oam remote-loopback start
interface interface-type
interface-number
By default, Ethernet OAM remote
loopback is disabled.
Enabling Ethernet OAM remote loopback for a port in
interface view
Step
Command
Remarks
1. Enter system view.
system-view
N/A
2. Enter Layer 2/Layer 3
Ethernet port view. interface interface-type
interface-number N/A
3. Enable Ethernet OAM
remote loopback on the port. oam remote-loopback start By default, Ethernet OAM remote
loopback is disabled.

10
Rejecting the Ethernet OAM remote loopback request from a
remote port
The Ethernet OAM remote loopback feature impacts other services. To solve this problem, you can
disable a port from being controlled by the Loopback Control OAMPDUs sent by a remote port. The
local port then rejects the Ethernet OAM remote loopback request from the remote port.
To reject the Ethernet OAM remote loopback request from a remote port:
Step
Command
Remarks
1. Enter system view.
system-view
N/A
2. Enter Layer 2/Layer 3
Ethernet port view. interface interface-type
interface-number
N/A
3. Reject the Ethernet OAM
remote loopback request
from a remote port.
oam remote-loopback
reject-request
By default, a port does not reject
the Ethernet OAM remote
loopback request from a remote
port.
This setting does not affect the
loopback test that has been
performed on the port. It takes
effect when the next loopback
starts on the port.
Displaying and maintaining Ethernet OAM
Execute display commands in any view and reset commands in user view:
Task
Command
Display information about an Ethernet OAM
connection.
display oam { local | remote } [ interface
interface-type interface-number ]
Display Ethernet OAM configuration. display oam configuration [ interface
interface-type interface-number ]
Display the statistics on critical events after an
Ethernet OAM connection is established.
display oam critical-event [ interface
interface-type interface-number ]
Display the statistics on Ethernet OAM link error
events after an Ethernet OAM connection is
established.
display oam link-event { local | remote }
[ interface interface-type interface-number ]
Clear statistics on Ethernet OAM packets and
Ethernet OAM link error events.
reset oam [interface interface-type
interface-number ]
Ethernet OAM configuration example
Network requirements
On the network shown in Figure 1, perform the following operations:
•Enable Ethernet OAM on Device A and Device B to auto-detect link errors between the two
devices

11
•Determine the performance of the link between Device A and Device B by collecting statistics
about the error frames received by Device A
Figure 1 Network diagram
Configuration procedure
1. Configure Device A:
# Configure GigabitEthernet 1/0/1 to operate in active Ethernet OAM mode, and enable
Ethernet OAM for it.
<DeviceA> system-view
[DeviceA] interface gigabitethernet 1/0/1
[DeviceA-GigabitEthernet1/0/1] oam mode active
[DeviceA-GigabitEthernet1/0/1] oam enable
# Set the errored frame event detection window to 20000 milliseconds, and set the errored
frame event triggering threshold to 10.
[DeviceA-GigabitEthernet1/0/1] oam errored-frame window 200
[DeviceA-GigabitEthernet1/0/1] oam errored-frame threshold 10
[DeviceA-GigabitEthernet1/0/1] quit
2. Configure Device B:
# Configure GigabitEthernet 1/0/1 to operate in passive Ethernet OAM mode (the default), and
enable Ethernet OAM for it.
<DeviceB> system-view
[DeviceB] interface gigabitethernet 1/0/1
[DeviceB-GigabitEthernet1/0/1] oam mode passive
[DeviceB-GigabitEthernet1/0/1] oam enable
[DeviceB-GigabitEthernet1/0/1] quit
3. Verify the configuration:
Use the display oam critical-event command to display the statistics of Ethernet OAM critical
link events. For example:
# Display the statistics of Ethernet OAM critical link events on all the ports of Device A.
[DeviceA] display oam critical-event
-----------[GigabitEthernet1/0/1] -----------
Local link status : UP
Event statistics
Link fault : Not occurred
Dying gasp : Not occurred
Critical event : Not occurred
The output shows that no critical link event occurred on the link between Device A and Device
B.
Use the display oam link-event command to display the statistics of Ethernet OAM link events.
For example:
# Display Ethernet OAM link event statistics of the local end of Device A.
[DeviceA] display oam link-event local
------------ [GigabitEthernet1/0/1] -----------
GE1/0/1 GE1/0/1
Device A Device B

12
Link status: UP
OAM local errored frame event
Event time stamp : 5789 x 100 milliseconds
Errored frame window : 200 x 100 milliseconds
Errored frame threshold : 10 error frames
Errored frame : 13 error frames
Error running total : 350 error frames
Event running total : 17 events
The output shows the following:
 350 errors occurred after Ethernet OAM is enabled on Device A.
 17 errors were caused by error frames.
 The link is unstable.

13
Configuring CFD
Overview
Connectivity Fault Detection (CFD), which conforms to IEEE 802.1ag Connectivity Fault
Management (CFM) and ITU-T Y.1731, is an end-to-end per-VLAN link layer OAM mechanism. CFD
is used for link connectivity detection, fault verification, and fault location.
Basic CFD concepts
Maintenance domain
A maintenance domain (MD) defines the network or part of the network where CFD plays its role. An
MD is identified by its MD name.
To accurately locate faults, CFD introduces eight levels (from 0 to 7) to MDs. The bigger the number,
the higher the level and the larger the area covered. Domains can touch or nest (if the outer domain
has a higher level than the nested one) but cannot intersect or overlap.
MD levels facilitate fault location and make fault location more accurate. As shown in Figure 2, MD_A
in light blue nests MD_B in dark blue. If a connectivity fault is detected at the boundary of MD_A, any
of the devices in MD_A, including Device A through Device E, might fail. If a connectivity fault is also
detected at the boundary of MD_B, the failure points can be any of Device B through Device D. If the
devices in MD_B can operate correctly, at least Device C is operational.
Figure 2 Two nested MDs
CFD exchanges messages and performs operations on a per-domain basis. By planning MDs
correctly in a network, you can use CFD to rapidly locate failure points.
Maintenance association
A maintenance association (MA) is a part of an MD. You can configure multiple MAs in an MD as
needed. An MA is identified by the MD name + MA name.
An MA serves the specified VLAN or no VLAN. An MA that serves a VLAN is considered to be
carrying VLAN attribute. An MA that serves no VLAN is considered to be carrying no VLAN attribute.
An MP can receive packets sent by other MPs in the same MA. The level of an MA equals the level of
the MD that the MA belongs to.
Port A2
Port A1 Port A3
Port A4
Device A
Port B2
Port B1 Port B3
Port B4
Device B
Port C2
Port C1 Port C3
Port C4
Device C
Port D2
Port D1 Port D3
Port D4 Device D
Port E2
Port E1 Port E3
Port E4
Device E
MD_A
MD_B
VLAN 100
Port