10
MAD detects active IRF devices with the same Layer 3 global configuration by extending the LACP, the
BFD protocol, or the gratuitous ARP. For more information, see “
Configuring MAD detection
.”
2.
Collision handling
If multiple identical active IRF virtual devices are detected, only the one that has the lowest master ID can
operate in active state and forward traffic normally. MAD sets all other IRF virtual devices in the recovery
state (disabled) and shuts down all physical ports but the IRF ports and any other ports you have
specified with the
mad exclude interface
command.
3.
Failure recovery
An IRF link failure triggers IRF virtual device partition and causes multi-active collision. In this case, repair
the failed IRF link to make the collided IRF virtual devices merge into one and recover the failure. If the
IRF virtual device in the recovery state fails before the failure is recovered, repair both the failed IRF
virtual device and the failed IRF link, and then the collided IRF virtual devices can merge into one and
the failure is recovered. If the IRF virtual device in the active state fails before the failure is recovered,
enable the IRF virtual device in the recovery state at the CLI to make it take over the active IRF virtual
device and protect the services from being affected. Then, recover the MAD failure.
For more information about LACP, see
Layer 2—LAN Switching Configuration Guide
. For information
about BFD, see
High Availability Configuration Guide
. For information about gratuitous ARP, see
Layer
3—IP Services Configuration Guide
.
IRF virtual device configuration task list
Before configuring an IRF virtual device, plan the roles and functions of all member switches. HP
recommends the configuration procedure in
Figure 6
.
Figure 6
IRF configuration flow chart
Connect physical IRF ports with SFP+ cables or fibers after activating IRF port configurations. After the
device detects that the IRF ports are connected normally, master election starts immediately, and then the
elected subordinate switches reboot automatically.
After an IRF virtual device is formed, configure and manage the IRF virtual device by logging in to any
device in the IRF.
Complete the following tasks to configure an IRF virtual device:
Task Remarks
Specifying a domain ID for an IRF virtual device
Optional.
Changing the IRF member ID of a switch
Required.
Configuring IRF ports
Required.
Specifying a priority for a member switch
Optional.
Configuring a description for a member switch
Optional.
