3Com 4210G Series, Configuration Manual, Page: 1109 / 1133

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The above setting takes effect after the reboot of the device.
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You can use the
display irf configuration
command to view the current member ID of the device
and the member ID will be used after the device reboot.
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In an IRF, member IDs are not only used to identify devices, but also used to identify the port
configurations on different member devices in the configuration file. Therefore, modifying a
member ID may cause device configuration changes or even losses, so modify member ID with
caution. For example, three members (of same device model) with the member IDs of 1, 2 and 3
are connected to an IRF port. Suppose that each member has several ports: change the member
ID of device 2 to 3, change that of device 3 to 2, reboot both devices, and add them into the IRF
again. Then device 2 will use the original port configurations of device 3, and device 3 will use
those of device 2.
Specifying a Priority for an IRF Member
Each IRF member has a priority. During the master election, a member with the greatest priority will be
elected as the master.
The priority of a device defaults to 1. You can modify the priority through command lines. The greater
the priority value, the higher the priority. A member with a higher priority is more likely to be a master,
and more likely to preserve its ID in a member ID collision.
Follow these steps to specify a priority for an IRF member:
To do… Use the command… Remarks
Enter system view
system-view
—
Specify a priority for an IRF
member
irf member member-id priority
priority
Optional
The priority of an IRF
member defaults to 1
The setting of priority takes effect right after your configuration without the need of rebooting the
device.
Specifying the Preservation Time of IRF Bridge MAC Address
A device uses the bridge MAC address when it communicates with the outside as a network bridge. A
bridge device on the network has its unique bridge MAC address. Some Layer 2 protocols (like LACP)
use bridge MAC addresses to identify different devices. During the forwarding of Layer 2 packets, if the
destination MAC address of a packet is the bridge MAC address of a device, it means that the packet
is sent to this device.