H3C S9500E Series User manual

H3C S9500E Series Routing Switches
IRF Command Reference
Hangzhou H3C Technologies Co., Ltd.
http://www.h3c.com
Software version: S9500E-CMW520-R1828P04
Document version: 6W182-20140823

Copyright © 2013-2014, Hangzhou H3C Technologies Co., Ltd. and its licensors
All rights reserved
No part of this manual may be reproduced or transmitted in any form or by any means without prior
written consent of Hangzhou H3C Technologies Co., Ltd.
Trademarks
H3C, , H3CS, H3CIE, H3CNE, Aolynk, , H3Care, , IRF, NetPilot, Netflow,
SecEngine, SecPath, SecCenter, SecBlade, Comware, ITCMM and HUASAN are trademarks of
Hangzhou H3C Technologies Co., Ltd.
All other trademarks that may be mentioned in this manual are the property of their respective owners
Notice
The information in this document is subject to change without notice. Every effort has been made in the
preparation of this document to ensure accuracy of the contents, but all statements, information, and
recommendations in this document do not constitute the warranty of any kind, express or implied.

Preface
The H3C S9500E documentation set includes 14 command references, which describe the commands
and command syntax options available for the H3C S9500E Series Routing Switches.
The IRF Command Reference describes Intelligent Resilient Framework (IRF) configuration commands.
This preface includes:
•Audience
•Conventions
•About the H3C S9500E documentation set
•Obtaining documentation
•Technical support
•Documentation feedback
Audience
This documentation is intended for:
•Network planners
•Field technical support and servicing engineers
•Network administrators working with the S9500E series
Conventions
This section describes the conventions used in this documentation set.
Command conventions
Convention Descri
p
tion
Boldface Bold text represents commands and keywords that you enter literally as shown.
Italic Italic text represents arguments that you replace with actual values.
[ ] Square brackets enclose syntax choices (keywords or arguments) that are optional.
{ x | y | ... }
Braces enclose a set of required syntax choices separated by vertical bars, from which
you select one.
[ x | y | ... ]
Square brackets enclose a set of optional syntax choices separated by vertical bars, from
which you select one or none.
{ x | y | ... } *
Asterisk marked braces enclose a set of required syntax choices separated by vertical
bars, from which you select at least one.
[ x | y | ... ] *
Asterisk marked square brackets enclose optional syntax choices separated by vertical
bars, from which you select one choice, multiple choices, or none.
&<1-n> The argument or keyword and argument combination before the ampersand (&) sign can
be entered 1 to n times.

Convention Descri
p
tion
# A line that starts with a pound (#) sign is comments.
GUI conventions
Convention Descri
p
tion
Boldface Window names, button names, field names, and menu items are in Boldface. For
example, the New User window appears; click OK.
> Multi-level menus are separated by angle brackets. For example, File > Create > Folder.
Symbols
Convention Descri
p
tion
WARNING An alert that calls attention to important information that if not understood or followed can
result in personal injury.
CAUTION An alert that calls attention to important information that if not understood or followed can
result in data loss, data corruption, or damage to hardware or software.
IMPORTANT An alert that calls attention to essential information.
NOTE An alert that contains additional or supplementary information.
TIP An alert that provides helpful information.
Network topology icons
Represents a generic network device, such as a router, switch, or firewall.
Represents a routing-capable device, such as a router or Layer 3 switch.
Represents a generic switch, such as a Layer 2 or Layer 3 switch, or a router that supports
Layer 2 forwarding and other Layer 2 features.
Represents an access controller, a unified wired-WLAN module, or the access controller
engine on a unified wired-WLAN switch.
Represents an access point.
Represents a mesh access point.
Represents omnidirectional signals.
Represents directional signals.
Represents a security product, such as a firewall, UTM, multiservice security gateway, or
load-balancing device.





Represents a security card, such as a firewall, load-balancing, NetStream, SSL VPN, IPS,
or ACG card.
Port numbering in examples
The port numbers in this document are for illustration only and might be unavailable on your device.
About the H3C S9500E documentation set
The H3C S9500E documentation set includes:
Cate
g
or
y
Documents Pur
p
oses
Product description and
specifications
Marketing brochures Describe product specifications and benefits.
Technology white papers
Provide an in-depth description of software features
and technologies.
Card datasheets Describe card specifications, features, and
standards.
Hardware specifications
and installation
Regulatory compliance
and safety information
Provides regulatory information and the safety
instructions that must be followed during installation.
Installation guide Provides a complete guide to hardware installation
and hardware specifications.
H3C Pluggable SFP
[SFP+][XFP] Transceiver
Modules Installation
Guide
Guides you through installing SFP/SFP+/XFP
transceiver modules.
Adjustable Slider Rail
Installation Guide
Guides you through installing adjustable slider rails
to a rack.
H3C Transceiver Modules
User Guide
Describes transceiver modules available for the H3C
high-end network products, their external views, and
specifications.
Software configuration
Configuration guides Describe software features and configuration
procedures.
Command references Provide a quick reference to all available
commands.
Operations and
maintenance
System log messages Explains the system log messages.
Trap messages Explains the trap messages.
MIB Companion Describes the MIBs for the software release.
Release notes
Provide information about the product release,
including the version history, hardware and software
compatibility matrix, version upgrade information,
technical support information, and software
upgrading.

Obtaining documentation
Access the most up-to-date H3C product documentation on the World Wide Web
at http://www.h3c.com.
Click the links on the top navigation bar to obtain different categories of product documentation:
[Technical Support & Documents > Technical Documents]—Provides hardware installation, software
upgrading, and software feature configuration and maintenance documentation.
[Products & Solutions]—Provides information about products and technologies, as well as solutions.
[Technical Support & Documents > Software Download]—Provides the documentation released with the
software version.
Technical support
servi[email protected]
http://www.h3c.com
Documentation feedback
You can e-mail your comments about product documentation to [e-mail].
We appreciate your comments.

i
Contents
IRF configuration commands ······································································································································· 1
chassis convert mode irf ··········································································································································1
display irf ··································································································································································2
display irf configuration···········································································································································4
display irf link ···························································································································································5
display irf topology ··················································································································································6
display mad ······························································································································································7
display restricted port ··············································································································································8
irf auto-merge enable···············································································································································9
irf auto-update enable··········································································································································· 10
irf domain······························································································································································· 11
irf link-delay···························································································································································· 12
irf link-status detect enable ··································································································································· 13
irf link-status auto-recover enable························································································································· 13
irf mac-address persistent ····································································································································· 14
irf member······························································································································································ 15
irf member description·········································································································································· 16
irf member priority················································································································································· 16
irf member renumber············································································································································· 17
irf mode enhanced ················································································································································ 18
irf priority································································································································································ 20
irf switch-to ····························································································································································· 21
irf-port member-id/port-number···························································································································· 22
irf-port port-number················································································································································ 22
mad arp enable····················································································································································· 23
mad bfd enable····················································································································································· 24
mad enable···························································································································································· 25
mad exclude interface ·········································································································································· 26
mad ip address······················································································································································ 27
mad restore ···························································································································································· 28
port group interface ·············································································································································· 29
set irf slot member-id ············································································································································· 30
Index ············································································································································································· 1

1
IRF configuration commands
chassis convert mode irf
Syntax
chassis convert mode irf
undo chassis convert mode
View
System view
Default level
3: Manage level
Parameters
None
Description
Use chassis convert mode irf to enable IRF mode.
Use undo chassis convert mode to restore standalone mode.
By default, the device operates in standalone mode.
To set up an IRF fabric, place all its member devices in IRF mode after configuring their member IDs,
priorities, and IRF port settings. In standalone mode, a device cannot form an IRF fabric with other
devices.
IRF generates packets on a device in IRF mode even if the device does not form an IRF fabric with any
other device. To conserve system resources, set a device to operate in standalone mode after removing
it from an IRF fabric.
Save any configuration you have made to avoid data loss before changing the device to operate in a
different mode, because the device will reboot automatically to make the new operating mode take
effect.
Make sure you have assigned a member ID to each IRF member device before you enable the IRF mode.
If no member ID is assigned, two hyphens (--) is displayed in the output of the MemberID field from the
display irf-configuration command.
The base cards and sub-cards can operate only when the device operates in standalone mode. Before
switching the operating mode, check whether the related services will be affected. For more information
about base cards and sub-cards, see H3C S9500E Series Routing Switches Installation Guide.
For a device operating in IRF mode, you cannot configure the system operating mode to hybrid. For more
information about the system operating mode, see Fundamentals Configuration Guide.
Examples
# Enable IRF mode.
<Sysname> system-view
[Sysname] chassis convert mode irf

2
The device will switch to IRF mode and reboot. You are recommended to save the current
running configuration and specify the configuration file for the next startup. Continue?
[Y/N]:y
Do you want to convert the content of the next startup configuration file flash:/startup.cfg
to make it available in IRF mode? [Y/N]:y
Please wait...
Saving the converted configuration file to the main board succeeded.
Slot 1:
Saving the converted configuration file succeeded.
Now rebooting, please wait...
# Restore standalone mode.
<Sysname> system-view
[Sysname] undo chassis convert mode
The device will switch to stand-alone mode and reboot. You are recommended to save the
current running configuration and specify the configuration file for the next startup.
Continue? [Y/N]:y
Do you want to convert the content of the next startup configuration file flash:/startup.cfg
to make it available in stand-alone mode? [Y/N]:y
Please wait...
Saving the converted configuration file to the main board succeeded.
Chassis 2 Slot 1:
Saving the converted configuration file succeeded.
Now rebooting, please wait...
display irf
Syntax
display irf [ |{ begin | exclude | include } regular-expression ]
View
Any view
Default level
1: Monitor level
Parameters
|: 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.
Description
Use display irf to display IRF fabric information, including the member ID, role, priority, bridge MAC
address, and description of each IRF member.
Examples
# Display information about the IRF fabric.

3
<Sysname> display irf
Switch Slot Role Priority CPU-Mac Description
*+1 0 Master 1 00e0-fc0a-15e0 F1Num001
1 1 Slave 1 00e0-fc0f-8c02 F1Num002
------------------------------------------------------
* indicates the device is the master.
+ indicates the device through which the user logs in.
The Bridge MAC of the IRF is: 000f-e26a-58ed
Auto upgrade : no
Mac persistent : always
Domain ID : 30
Auto merge : No
Table 1 Command output
Field Descri
p
tion
Switch
IRF member ID:
•ID of the master is prefixed with an asterisk (*) sign.
•ID of the device where you are logged in is prefixed with a plus (+) sign.
Slot MPU slot number.
Role
Role of the MPU in the IRF fabric:
•Slave—Standby MPU for the global active MPU.
•Master—Global active MPU.
•SlaveWait—MPU that is joining the IRF fabric as a standby for the
global active MPU.
•Loading—Standby MPU for the global active MPU. The standby MPU is
loading system software image.
CPU-MAC CPU MAC address of the MPU.
Description
Description you have configured for the member device.
•If no description is configured, this field displays a dashed line (—).
•If the description exceeds the maximum number of characters that can
be displayed, an ellipsis (…) is displayed in place of the exceeding text.
To display the complete description, use the display
current-configuration command.
Auto upgrade
Status of the software auto-update function:
•yes—Enabled.
•no—Disabled.
MAC persistent
IRF bridge MAC persistence setting:
•6 min—Bridge MAC address of the IRF fabric persists for 6 minutes
after the master leaves.
•always—Bridge MAC address of the IRF fabric does not change after
the master leaves.
•no—Bridge MAC address of the new master replaces the original one
as soon as the old master leaves.
Domain ID Domain ID assigned to the IRF fabric. A domain ID is used to uniquely
identify an IRF fabric when there are multiple IRF fabrics in the network.

4
Field Descri
p
tion
Auto merge
Whether the auto-reboot for IRF fabric merge is enabled:
•yes—Enabled.
•no—Disabled.
display irf configuration
Syntax
display irf configuration [ |{ begin | exclude | include } regular-expression ]
View
Any view
Default level
1: Monitor level
Parameters
|: 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.
Description
Use display irf configuration to display basic IRF settings.
In standalone mode, this command displays the member ID, priority, and IRF port bindings of the device.
These settings take effect after you enable IRF mode.
In IRF mode, this command displays each member's current member ID, new member ID, and IRF port
bindings. The new member ID settings take effect at the next startup.
Examples
# In standalone mode, display the basic IRF settings of the device.
<Sysname> display irf configuration
MemberID Priority IRF-Port1 IRF-Port2
-- 1 disable disable
# In IRF mode, display all members' basic IRF settings.
<Sysname> display irf configuration
MemberID NewID IRF-Port1 IRF-Port2
1 1 Ten-GigabitEthernet1/8/0/1 disable
Ten-GigabitEthernet1/8/0/2
2 2 disable Ten-GigabitEthernet2/12/0/1
Ten-GigabitEthernet2/12/0/2

5
Table 2 Command output
Field Descri
p
tion
MemberID Current member ID of the device.
If no member ID is assigned, this field displays two hyphens (--).
Priority Member priority.
This field is displayed only when the device operates in standalone mode.
New-ID Member ID assigned to the device. This member ID takes effect at reboot.
This field is displayed only when the device operates in IRF mode.
IRF-Port1 Physical ports bound to IRF-port 1. If no physical port is bound to the IRF port, this
field displays disable.
IRF-Port2 Physical ports bound to IRF-port 2. If no physical port is bound to the IRF port, this
field displays disable.
display irf link
Syntax
display irf link
View
Any view
Default level
1: Monitor level
Parameters
None
Description
Use display irf link to display IRF link information, including the IRF ports, physical IRF ports and IRF link
status.
Examples
# Display IRF link information.
<Sysname>display irf link
Member 1
IRF Port Interface Status
1 disable --
2 GigabitEthernet1/3/0/1 UP
GigabitEthernet1/5/0/1 ADM
GigabitEthernet1/6/0/1 DOWN
Member 2
IRF Port Interface Status
1 GigabitEthernet2/3/0/1 UP
GigabitEthernet2/5/0/1 DOWN
GigabitEthernet2/6/0/1 ADM
2 disable --

6
Table 3 Command output
Field Description
Member ID IRF member ID.
IRF Port
IRF port number:
•1—IRF-port 1.
•2—IRF-port 2.
Interface Physical ports bound to the IRF port. If no physical port has been bound to the IRF
port, this field displays disable.
Status
Link state of IRF physical ports:
•UP—Link is up.
•DOWN—Link is down.
•ADM—The port has been manually shut down with the shutdown command.
•ABSENT—Interface module that hosts the port is not present.
display irf topology
Syntax
display irf topology [ |{ begin | exclude | include } regular-expression ]
View
Any view
Default level
1: Monitor level
Parameters
|: 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.
Description
Use display irf topology to display IRF fabric topology information, including the member IDs, IRF port
state, adjacencies of IRF ports, and CPU MAC address of the master.
Examples
# Display the IRF fabric topology.
<Sysname> display irf topology
Topology Info
-------------------------------------------------------------------------
IRF-Port1 IRF-Port2
Switch Link neighbor Link neighbor Belong To
1 DIS -- UP 2 00e0-fc0f-8c0f

7
2 UP 1 DOWN -- 00e0-fc0f-8c0f
Table 4 Command output
Field Descri
p
tion
Switch This field displays member ID.
IRF-Port 1 Information about IRF-port 1, including its link state and neighbor.
IRF-Port 2 Information about IRF-port 2, including its link state and neighbor.
Link
Link state of the IRF port:
•UP—IRF link is up.
•DOWN—IRF link is down.
•DIS—No physical ports have been bound to the IRF port. You must use the
port group interface command to bind at least one physical port to the IRF
port.
•TIMEOUT—IRF hello interval has timed out. You must examine the link for a
connection loss.
neighbor IRF member ID of the device connected to the IRF port.
If no device is connected to the IRF port, this field displays two hyphens (--).
Belong To IRF fabric that has the device, represented by the CPU MAC address of the
master in the IRF fabric.
display mad
Syntax
display mad [ verbose ] [ |{ begin | exclude | include } regular-expression ]
View
Any view
Default level
1: Monitor level
Parameters
verbose: Displays detailed MAD information. If this keyword is not provided, the command only displays
whether a MAD mechanism is enabled.
|: 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.
Description
Use display mad to display MAD status and settings.
Examples
# Display brief MAD information.

8
<Sysname> display mad
MAD LACP enabled.
MAD BFD disabled.
MAD ARP disabled.
# Display detailed MAD information.
<Sysname> display mad verbose
Current MAD status: Detect
Excluded ports(configurable):
GigabitEthernet 2/1/0/2
GigabitEthernet 2/1/0/3
Excluded ports(can not be configured):
Ten-GigabitEthernet1/2/0/25
Ten-GigabitEthernet2/2/0/26
MAD enabled aggregation port:
Bridge-Aggregation2
MAD BFD enabled interface:
Vlan-interface10
mad ip address 10.0.0.2 255.255.0.0 member 1
mad ip address 10.0.0.3 255.255.0.0 member 2
Table 5 Command output
Field Descri
p
tion
Current MAD status
Status of MAD detection:
•Detect—The IRF fabric is integrated.
•Recovery—The IRF fabric is in Recovery state. When detecting a
multi-active collision, MAD places the IRF fabric with higher master ID
in Recovery state. MAD also shuts down all physical ports in the fabric
except IRF physical ports and ports that are configured to not shut
down.
•Detect to Recovery—The state of the IRF fabric is changing from Detect
to Recovery, for example, as the result of an IRF split.
•Recovery to Detect—The state of the IRF fabric is changing from
Recovery to Detect when the failed IRF link is recovered.
Excluded ports (configurable) Ports manually configured to not shut down when the IRF fabric transits to
the Recovery state.
Excluded ports (can not be
configured)
Ports set by default to not shut down when the IRF fabric transits to the
Recovery state.
MAD enabled aggregation port Aggregate interface where LACP MAD is enabled.
display restricted port
Syntax
display restricted port [chassis chassis-number [ slot slot-number ] ] [ |{ begin | exclude | include }
regular-expression ]
View
Any view

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Default level
1: Monitor level
Parameters
chassis chassis-number [ slot slot-number ]: Specifies an IRF member device or a card on an IRF member
device. The chassis-number argument represents the ID of the IRF member device, and the slot-number
argument represents the slot number of the card. To display the member ID and slot number, use the
display device command. If you specify an IRF member device without specifying a card, this command
displays all restricted ports on the device. If neither IRF member ID nor card slot number is specified, this
command displays all restricted ports in the IRF fabric.
|: 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.
Description
Use display restricted port to display restricted ports.
A restricted port in the system does not receive or forward multicast packets.
Examples
# Display the restricted ports on the card in slot 4 of IRF member 1.
[Sysname]display restricted port chassis 1 slot 4
Chassis: 1
slot: 4
restricted port:
GigabitEthernet1/4/0/1 GigabitEthernet1/4/0/2
Table 6 Command output
Field Descri
p
tion
Chassis Member ID of the device.
irf auto-merge enable
Syntax
irf auto-merge enable
undo irf auto-merge enable
View
System view
Default level
3: Manage level

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Parameters
None
Description
Use irf auto-merge enable to enable auto reboot for IRF fabric merge. The function enables an IRF fabric
to reboot its member devices automatically if it fails in the master election during an IRF fabric merge.
Use undo irf auto-merge enable to disable this function.
By default, this function is disabled. To complete an IRF fabric merge, you must manually reboot the IRF
fabric that has failed in the master election.
To avoid an auto reboot failure, make sure the auto reboot function is enabled on both IRF fabrics that are
merging.
This command is available only when the device is operating in IRF mode. When the operating mode is
changed to standalone, the configuration of this command is lost, regardless of whether you have saved
the configuration.
The auto reboot function takes effect for an IRF merge that occurs when the IRF link recovers from a link
failure, or when you connect the IRF physical ports of the member devices. It does not take effect for the
IRF merge that occurs when you bind a physical port to an IRF port in IRF mode.
For an IRF fabric that uses a relay device, a relay link failure on the relay device does not cause
immediate IRF split. Instead, the IRF fabric splits only if the link fails to recover within 20 seconds. If an
IRF merge occurs when the relay link recovers, the IRF fabric part that fails in the master election reboots
its member devices automatically to complete the merge, regardless of whether the auto merge function
is enabled.
Examples
# Enable auto reboot for the IRF fabric merge.
<Sysname> system-view
[Sysname] irf auto-merge enable
irf auto-update enable
Syntax
irf auto-update enable
undo irf auto-update enable
View
System view
Default level
3: Manage level
Parameters
None
Description
Use irf auto-update enable to enable the software auto-update function for propagating the system
software image of the master to all its members.
Use undo irf auto-update enable to disable the software auto-update function.

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By default, this function is enabled.
This command is available in IRF mode. Changing the operating mode from IRF to standalone can cause
loss of the irf auto-update enable command configuration even if you have saved the configuration.
When you add a device to the IRF fabric, the software auto-update function compares the system
software versions of the device and the IRF master. If the versions are different, the device performs the
following tasks automatically:
1. Downloads the system software image from the master.
2. Sets the downloaded image as the system software for the next startup.
3. Reboots with the new system software image to rejoin the IRF fabric.
To avoid an update failure, make sure the device has efficient storage space for the new system software
image.
If the device you are adding to the IRF fabric is incompatible with the software version running on the
master, the software auto-update function cannot work correctly. The wider the software version gap, the
higher the failure risk. For more information about the software version, see the release note for that
version.
When the master is propagating its system software image to the member devices, do not remove or
reboot the active MPU of each member device, and make sure the IRF links between each pair of
member devices are all in up state.
If software auto-update function is disabled, you must manually update the device with the system
software image of the master before adding it to the IRF fabric.
Examples
# Enable the software auto-update function.
<Sysname> system-view
[Sysname] irf auto-update enable
irf domain
Syntax
irf domain domain-id
undo irf domain
View
System view
Default level
3: Manage level
Parameters
domain-id: Specifies a domain ID for the IRF fabric. The value range is 0 to 4294967295.
Description
Use irf domain to assign a domain ID to an IRF fabric.
Use undo irf domain to restore the default.
By default, the domain ID of an IRF fabric is 0.

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This command is available in IRF mode. Changing the operating mode from IRF to standalone can cause
loss of the IRF domain setting even if you have saved the configuration.
One IRF fabric forms one IRF domain. IRF uses IRF domain IDs to uniquely identify IRF fabrics and prevent
IRF fabrics from interfering with one another.
If you use one IRF fabric as the intermediate device for LACP MAD or ARP MAD for another IRF fabric,
assign the two IRF fabrics different domain IDs for correct split detection. False detection causes IRF split.
Examples
# Set the domain ID of the IRF fabric to 30.
<Sysname> system-view
[Sysname] irf domain 30
irf link-delay
Syntax
irf link-delay interval
undo irf link-delay
View
System view
Default level
3: Manage level
Parameters
interval: Sets the IRF link down report delay in milliseconds. The value range is 200 to 2000. If the
interval is set to 0, link down events are reported without any delay.
Description
Use irf link-delay to set a delay for the IRF ports to report a link down event.
Use undo irf link-delay to restore the default.
By default, if an IRF link changes from up to down, the IRF port immediately reports the event to the IRF
fabric.
An IRF link down report delay helps avoid link flapping. Link flapping causes frequent IRF splits and
merges during a short time.
An IRF port handles link down and link up events as follows:
•When the IRF link changes from up to down, the port does not immediately report the change to the
IRF fabric. If the IRF link state is still down when the delay time is reached, the port reports the
change to the IRF fabric.
•When the IRF link changes from down to up, the link layer immediately reports the event to the IRF
fabric.
This command is available in IRF mode. Changing the operating mode from IRF to standalone can cause
loss of the irf link-delay setting even if you have saved the configuration.
Examples
# Set the IRF link down report delay to 300 milliseconds.
<Sysname> system-view

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[Sysname] irf link-delay 300
irf link-status detect enable
Syntax
irf link-status detect enable
undo irf link-status detect enable
View
System view
Default level
3: Manage level
Parameters
None
Description
Use irf link-status detect enable to enable IRF link failure detection.
Use undo irf link-status detect enable to disable IRF link failure detection.
By default, IRF link failure detection is enabled.
IRF link failure detection checks the health of IRF links automatically. Use this function when your IRF
fabric has more than one IRF link.
This command is available in IRF mode. Changing the operating mode from IRF to standalone can cause
loss of the undo irf link-status detect enable command configuration even if you have saved the
configuration.
Examples
# Disable IRF link failure detection.
<Sysname> system-view
[Sysname] undo irf link-status detect enable
irf link-status auto-recover enable
Syntax
irf link-status auto-recover enable
undo irf link-status auto-recover enable
View
System view
Default level
3: Manage level
Parameters
None