H3C S12500-X Installation manual

H3C S12500-X Switch Series
IRF
Command Reference
Hangzhou H3C Technologies Co., Ltd.
http://www.h3c.com
Software version: R1003 and later
Document version: 6W101-20150515

Copyright © 2014-2015, 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 S12500-X documentation set includes 15 command references. These references describe the
commands and command syntax options available for the H3C S12500-X Switch Series.
The IRF Command Reference describes IRF configuration commands for setting up and maintaining an
IRF fabric.
This preface includes:
•Audience
•Conventions
•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 S12500-X 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.
Obtaining documentation
Access the most up-to-date H3C product documentation on the World Wide Web
at http://www.h3c.com.
Click the following links to obtain different categories of product documentation:
[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. [Software Download]—Provides the documentation released with the software version.
Technical support
servic[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 commands ······························································································································································ 1
chassis convert mode irf ··········································································································································1
display irf ··································································································································································2
display irf configuration···········································································································································3
display irf link ···························································································································································4
display irf topology ··················································································································································5
display irf-port load-sharing mode··························································································································6
display mad ······························································································································································8
irf auto-merge enable············································································································································ 10
irf domain······························································································································································· 11
irf isolate member·················································································································································· 12
irf link-delay···························································································································································· 12
irf mac-address persistent ····································································································································· 13
irf member······························································································································································ 14
irf member description·········································································································································· 15
irf member priority················································································································································· 16
irf member renumber············································································································································· 16
irf priority································································································································································ 17
irf-port global load-sharing mode ························································································································ 18
irf-port load-sharing mode ···································································································································· 19
irf-port member-id/port-number···························································································································· 20
irf-port port-number················································································································································ 21
irf-port-configuration active··································································································································· 22
mad bfd enable····················································································································································· 23
mad enable···························································································································································· 24
mad exclude interface ·········································································································································· 25
mad ip address······················································································································································ 26
mad restore ···························································································································································· 27
port group interface ·············································································································································· 28
Index ···········································································································································································30

1
IRF commands
chassis convert mode irf
Use chassis convert mode irf to enable IRF mode.
Use undo chassis convert mode to restore standalone mode.
Syntax
chassis convert mode irf
undo chassis convert mode
Default
The device operates in standalone mode.
Views
System view
Predefined user roles
network-admin
mdc-admin
Usage guidelines
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 protect system resources, set a device to operate in standalone mode after removing it
from an IRF fabric.
Examples
# Enable IRF mode.
<Sysname> system-view
[Sysname] chassis convert mode irf
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
Now rebooting, please wait...
System is starting...
# Restore standalone mode.
<Sysname> system-view
[Sysname] undo chassis convert mode
The device will switch to stand-alone mode and reboot.

2
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
Now rebooting, please wait...
System is starting...
display irf
Use display irf to display IRF fabric information, including the member ID, role, priority, bridge MAC
address, and description of each IRF member.
Syntax
display irf
Views
Any view
Predefined user roles
network-admin
network-operator
mdc-admin
mdc-operator
Examples
# Display IRF fabric information.
<Sysname> display irf
MemberID Slot Role Priority CPU-Mac Description
*+1 16 Master 1 0210-fc03-0007 -----
--------------------------------------------------
* indicates the device is the master.
+ indicates the device through which the user logs in.
The Bridge MAC of the IRF is: 3ce5-a6b8-3800
Auto upgrade : no
Mac persistent : always
Domain ID : 0
Auto merge : no
Table 1 Command output
Field Descri
p
tion
MemberID
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.

3
Field Descri
p
tion
Role
Role of the MPU in the IRF fabric:
•Standby—Standby MPU for the global active MPU.
•Master—Global active MPU.
•Loading—Standby MPU for the global active MPU. The standby MPU is
loading software images.
Priority IRF member priority.
CPU-MAC MAC address of the CPU on 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
This field is not supported in the current software version.
Status of the software auto-update feature:
•yes—Enabled.
•no—Disabled.
MAC persistent
IRF bridge MAC persistence setting:
•6 min—Bridge MAC address of the IRF fabric remains unchanged for 6
minutes after the address owner leaves.
•always—Bridge MAC address of the IRF fabric does not change after
the address owner leaves.
•no—Bridge MAC address of the current master replaces the original
bridge MAC address as soon as the owner of the original address
leaves.
Auto merge
State of the auto-merge feature:
•yes—Enabled. The IRF fabric automatically reboots its member devices
when it fails in the master election during an IRF fabric merge.
•no—Disabled. Manual reboot is required to complete an IRF fabric
merge.
display irf configuration
Use display irf configuration to display basic IRF settings, including the current member ID, new member
ID, and physical interfaces bound to the IRF ports on each IRF member device. The new member IDs take
effect at reboot.
Syntax
display irf configuration
Views
Any view
Predefined user roles
network-admin
network-operator

4
mdc-admin
mdc-operator
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-GigabitEthernet2/8/0/1
Ten-GigabitEthernet2/8/0/2
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 available when the device is operating in standalone mode.
NewID Member ID assigned to the device. This member ID takes effect at reboot.
This field is available when the device is operating in IRF mode.
IRF-Port1 Physical interfaces bound to IRF-port 1. The bindings take effect at reboot.
This field displays disable if no physical interfaces are bound to the IRF port.
IRF-Port2 Physical interfaces bound to IRF-port 2. The bindings take effect at reboot.
This field displays disable if no physical interfaces are bound to the IRF port.
display irf link
Use display irf link to display IRF link information, including IRF ports, IRF physical interfaces, and IRF
link status.
Syntax
display irf link
Views
Any view
Predefined user roles
network-admin
network-operator
mdc-admin
mdc-operator

5
Examples
# Display IRF link information.
<Sysname> display irf link
Member 1
IRF Port Interface Status
1 Ten-GigabitEthernet1/9/0/1 UP
Ten-GigabitEthernet1/9/0/2 UP
Ten-GigabitEthernet1/9/0/3 DOWN
Ten-GigabitEthernet1/9/0/4 ADM
2 disable --
Member 2
IRF Port Interface Status
1 disable --
2 Ten-GigabitEthernet2/8/0/1 UP
Ten-GigabitEthernet2/8/0/2 UP
Ten-GigabitEthernet2/8/0/3 DOWN
Ten-GigabitEthernet2/8/0/4 ADM
Table 3 Command output
Field Descri
p
tion
Member ID IRF member ID.
IRF Port
IRF port number:
•1—IRF-port 1.
•2—IRF-port 2.
Interface Physical interfaces bound to the IRF port. This field displays disable if no
physical interfaces have been bound to the IRF port.
Status
Link state of the IRF physical interface:
•UP—The link is up.
•DOWN—The link is down.
•ADM—The interface has been manually shut down by using the shutdown
command.
•ABSENT—Interface module that hosts the interface is not present.
display irf topology
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.
Syntax
display irf topology
Views
Any view
Predefined user roles
network-admin
network-operator

6
mdc-admin
mdc-operator
Examples
# Display the IRF fabric topology.
<Sysname> display irf topology
Topology Info
-------------------------------------------------------------------------
IRF-Port1 IRF-Port2
MemberID Link neighbor Link neighbor Belong To
1 UP 2 DIS --- 00e0-fc0f-8c0f
2 DIS --- UP 1 00e0-fc0f-8c0f
Figure 1 IRF topology
Table 4 Command output
Field Descri
p
tion
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—The IRF link is up.
•DOWN—The IRF link is down.
•DIS—No physical interfaces have been bound to the IRF port. You must use
the port group interface command to bind a minimum of one physical
interface 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.
This field displays three hyphens (---) if no device is connected to the IRF port.
Belong To IRF fabric that has the device, represented by the CPU MAC address of the
master in the IRF fabric.
display irf-port load-sharing mode
Use display irf-port load-sharing mode to display IRF link load sharing mode.
Syntax
display irf-port load-sharing mode [ irf-port [ member-id/port-number ] ]
Views
Any view
Predefined user roles
network-admin

7
network-operator
mdc-admin
mdc-operator
Parameters
irf-port: Displays IRF port-specific load sharing modes. If you do not specify this keyword, the command
displays the global load sharing mode for IRF links.
member-id/port-number: Specifies an IRF port number. The member-id argument represents an IRF
member ID. The port-number argument represents the index number (1 or 2) of the IRF port on the
member device. If you do not specify the member-id and port-number arguments, this command displays
the load sharing mode used on each IRF port in the IRF fabric.
Examples
# Display the global load sharing mode for IRF links. In this example, because no user-defined global
load sharing mode has been configured, the default global load sharing mode applies.
<Sysname> display irf-port load-sharing mode
irf-port Load-Sharing Mode:
Layer 2 traffic: destination-mac address, source-mac address
Layer 3 traffic: destination-ip address, source-ip address
Layer 4 traffic: destination-port, source-port
# Display the global load sharing mode for IRF links. In this example, because a global load sharing
mode based on source and destination IP addresses have been configured, the configured mode
applies.
<Sysname> display irf-port load-sharing mode
irf-port Load-Sharing Mode:
destination-ip address, source-ip address
# Display the load sharing mode of IRF-port 1/1. In this example, because neither port-specific load
sharing mode nor user-defined global load sharing mode has been configured, the default global load
sharing mode applies.
<Sysname> display irf-port load-sharing mode irf-port 1/1
irf-port 1/1 Load-Sharing Mode:
Layer 2 traffic: destination-mac address, source-mac address
Layer 3 traffic: destination-ip address, source-ip address
Layer 4 traffic: destination-port, source-port
# Display the load sharing mode of IRF-port 1/1. In this example, a load sharing mode based on source
and destination MAC addresses has been configured on the port.
<Sysname> display irf-port load-sharing mode irf-port 1/1
irf-port1/1 Load-Sharing Mode:
destination-mac address, source-mac address
# Display the load sharing mode used on each IRF port.
<Sysname> display irf-port load-sharing mode irf-port
irf-port1/1 Load-Sharing Mode:
destination-mac address, source-mac address
irf-port1/2 Load-Sharing Mode:
Layer 2 traffic: destination-mac address, source-mac address
Layer 3 traffic: destination-ip address, source-ip address

8
Layer 4 traffic: destination-port, source-port
Table 5 Command output
Field Descri
p
tion
irf-port Load-Sharing Mode
Global load sharing mode for IRF links:
•If no global IRF link load sharing mode has been configured, the
default global load sharing mode applies.
•If a user-defined global load sharing mode has been
configured, the configured mode applies.
irf-port 1/1 Load-Sharing Mode
Link load sharing mode of IRF-port 1/1:
•If you have not configured a port-specific load sharing mode,
the global IRF link load sharing mode applies.
•If you have configured a port-specific load sharing mode, the
configured mode applies.
Layer 2 traffic: destination-mac address,
source-mac address
Default load sharing mode for traffic that has no IP header. By
default, this type of traffic is distributed based on source and
destination MAC addresses.
Layer 3 traffic: destination-ip address,
source-ip address
Default load sharing mode for non-TCP/-UDP IP packets. By default,
this type of traffic is distributed based on source and destination IP
addresses.
Layer 4 traffic: destination-port,
source-port
Default load sharing mode for TCP/UDP packets. By default, this
type of traffic is distributed based on source and destination port
numbers.
destination-ip address, source-ip
address
User-configured IRF link load sharing mode. In this sample output,
traffic on the IRF port is distributed based on source and destination
IP addresses.
destination-mac address, source-mac
address
User-configured IRF link load sharing criteria. In this sample output,
the criteria are source and destination MAC addresses.
display mad
Use display mad to display MAD status and settings.
Syntax
display mad [ verbose ]
Views
Any view
Predefined user roles
network-admin
network-operator
mdc-admin
mdc-operator

9
Parameters
verbose: Displays detailed MAD information. If this keyword is not provided, the command only displays
whether a MAD mechanism is enabled.
Examples
# Display brief MAD information.
<Sysname> display mad
MAD ARP disabled.
MAD ND disabled.
MAD LACP enabled.
MAD BFD disabled.
# Display detailed MAD information.
<Sysname> display mad verbose
Current MAD status: Detect
Excluded ports(configurable):
Ten-GigabitEthernet2/1/0/2
Ten-GigabitEthernet2/1/0/3
Excluded ports(can not be configured):
Ten-GigabitEthernet1/9/0/1
Ten-GigabitEthernet1/9/0/2
Ten-GigabitEthernet1/9/0/3
Ten-GigabitEthernet1/9/0/4
Ten-GigabitEthernet2/9/0/1
Ten-GigabitEthernet2/9/0/2
Ten-GigabitEthernet2/9/0/3
Ten-GigabitEthernet2/9/0/4
MAD ARP disabled.
MAD ND disabled.
MAD enabled aggregation port:
Bridge-Aggregation2
MAD BFD enabled interface:
Vlan-interface2
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 6 Command output
Field Descri
p
tion
MAD ARP disabled. ARP MAD is not supported in the current software version.
MAD ND disabled. ND MAD is not supported in the current software version.

10
Field Descri
p
tion
Current MAD status
MAD status:
•Detect—The IRF fabric is integrated.
•Recovery—The IRF fabric is in Recovery state. When MAD detects that
an IRF fabric has split into multiple IRF fabrics, it allows one fabric to
forward traffic. All the other IRF fabrics are set to the Recovery state. In
Recovery state, MAD shuts down all physical ports in the fabric except
for the IRF physical interfaces and ports configured to not shut down.
•Detect to Recovery—State of the IRF fabric is changing from Detect to
Recovery, for example, as the result of an IRF split.
•Recovery to Detect—State of the IRF fabric is changing from Recovery to
Detect.
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.
irf auto-merge enable
Use irf auto-merge enable to enable IRF auto-merge. This command enables an IRF fabric to
automatically reboot its member devices if it fails in the master election during an IRF fabric merge.
Use undo irf auto-merge enable to disable IRF auto-merge.
Syntax
irf auto-merge enable
undo irf auto-merge enable
Default
IRF auto-merge is disabled. To complete an IRF merge, you must manually reboot the IRF fabric that has
failed in the master election.
Views
System view
Predefined user roles
network-admin
mdc-admin
Usage guidelines
For a successful merge, make sure IRF auto-merge is enabled on both IRF fabrics that are merging.
This command is available in IRF mode. When you change the operating mode from IRF to standalone,
the setting for this command is lost, regardless of whether you have saved the configuration. To enable
IRF auto-merge after you change the operating mode from standalone to IRF, reconfigure this command.
IRF auto-merge takes effect on merges caused by the following events:
•The IRF link recovers from a link failure.
•The IRF physical interfaces of the member devices are connected after the interfaces are bound to
IRF ports.

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The feature does not take effect on a merge that occurs when both of the following conditions exist:
•You bind a physical interface to an IRF port.
•The interface has been connected to the peer IRF physical interface before the binding operation.
Examples
# Enable IRF auto-merge.
<Sysname> system-view
[Sysname] irf auto-merge enable
irf domain
Use irf domain to assign a domain ID to an IRF fabric.
Use undo irf domain to restore the default IRF domain setting.
Syntax
irf domain domain-id
undo irf domain
Default
The IRF domain ID is 0.
Views
System view
Predefined user roles
network-admin
mdc-admin
Parameters
domain-id: Specifies a domain ID for the IRF fabric. The value range is 0 to 4294967295.
Usage guidelines
This command is available in IRF mode. When you change the operating mode from IRF to standalone,
the IRF domain setting is lost, regardless of whether 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 for another IRF fabric, assign the two
IRF fabrics different domain IDs for correct split detection. False detection causes IRF split.
An IRF fabric has only one IRF domain ID. You can change the IRF domain ID by using the irf domain or
mad enable command. The IRF domain IDs configured with these commands overwrite each other. In an
MDC environment, the irf domain command is available only on the default MDC, but the mad enable
command is available on all MDCs. If you change the IRF domain ID in one MDC, the IRF domain IDs
in all other MDCs change automatically.
Examples
# Set the IRF domain ID to 30.
<Sysname> system-view
[Sysname] irf domain 30

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irf isolate member
Use irf isolate member to isolate an unused IRF member ID.
Use undo irf isolate member to remove the isolation setting for a member ID.
NOTE:
This command is available in Release 1005P04 and later versions.
Syntax
irf isolate member member-id
undo irf isolate member member-id
Default
No member IDs are isolated.
Views
System view
Predefined user roles
network-admin
mdc-admin
Parameters
member-id: Specifies an IRF member ID. Available values are IDs that have not been assigned.
Usage guidelines
This command is available only in IRF mode.
Before you assign an isolated member ID to a new member device, you must remove the isolation setting
for the member ID.
Examples
# Isolate IRF member ID 4.
<Sysname> system-view
[Sysname] irf isolate member 4
irf link-delay
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.
Syntax
irf link-delay interval
undo irf link-delay
Default
The IRF link down event report delay is 4000 milliseconds (4 seconds).

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Views
System view
Predefined user roles
network-admin
mdc-admin
Parameters
interval: Sets the IRF link down report delay in the range of 0 to 10000 milliseconds. If the interval is set
to 0, link down events are reported without any delay.
Usage guidelines
This command is available in IRF mode. When you change the operating mode from IRF to standalone,
the command configuration is lost, regardless of whether you have saved the configuration.
When you configure the IRF link down report delay, follow these restrictions and guidelines:
•Make sure the IRF link down report delay is shorter than the heartbeat or hello timeout settings of
upper-layer protocols (for example, CFD, VRRP, FCoE, and OSPF). If the report delay is longer than
the timeout setting of a protocol, unnecessary recalculations might occur.
•Set the delay to 0 seconds in the following situations:
{The IRF fabric requires a fast master/subordinate or IRF link switchover.
{The BFD or GR feature is used.
Examples
# Set the IRF link down report delay to 300 milliseconds.
<Sysname> system-view
[Sysname] irf link-delay 300
irf mac-address persistent
Use irf mac-address persistent to configure IRF bridge MAC persistence.
Use undo irf mac-address persistent to enable the IRF fabric to change its bridge MAC address as soon
as the address owner leaves.
Syntax
irf mac-address persistent { always | timer }
undo irf mac-address persistent
Default
Bridge MAC address of the IRF fabric does not change after the address owner leaves.
Views
System view
Predefined user roles
network-admin
mdc-admin

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Parameters
always: Enables the IRF bridge MAC address to be permanent. The IRF bridge MAC address does not
change after the address owner leaves.
timer: Enables the IRF bridge MAC address to remain unchanged for 6 minutes after the address owner
leaves. If the owner rejoins the IRF fabric within the time limit, the IRF bridge MAC address does not
change. If the owner does not rejoin within the time limit, the IRF fabric uses the bridge MAC address of
the current master as the bridge MAC address.
Usage guidelines
IRF bridge MAC persistence specifies the amount of time an IRF fabric can continue using a bridge MAC
address as its bridge MAC address after the address owner leaves.
Bridge MAC persistence is available in IRF mode. When you change the operating mode from IRF to
standalone, the bridge MAC persistence setting is lost, regardless of whether you have saved the
configuration.
If the undo form of this command is configured, bridge MAC address of the current master replaces the
original IRF bridge MAC as soon as the original address owner leaves.
An IRF fabric by default uses the bridge MAC address of the master device as its bridge MAC address.
Layer 2 protocols, such as LACP, use this bridge MAC address to identify the IRF fabric. On a switched
LAN, the bridge MAC address must be unique.
To avoid duplicate bridge MAC addresses, an IRF fabric can change its bridge MAC address
automatically after the address owner leaves. However, the change causes temporary service disruption.
Depending on your network condition, you can enable the IRF fabric to retain or change its bridge MAC
address after the address owner leaves.
Use the irf mac-address persistent always command to disable IRF bridge MAC change if TRILL is
configured. The command setting avoids unnecessary traffic disruption caused by IRF bridge MAC
address changes on the TRILL network.
When IRF fabrics merge, IRF ignores the IRF bridge MAC address and only checks the bridge MAC
address of each member device in the IRF fabrics. IRF merge fails if any of the member devices have the
same bridge MAC address.
Examples
# Enable the IRF bridge MAC address to be permanent.
<Sysname> system-view
[Sysname] irf mac-address persistent always
irf member
Use irf member to assign a member ID to the device in standalone mode.
Use undo irf member to restore the default.
Syntax
irf member member-id
undo irf member
Default
The device operates in standalone mode and has no member ID.