R21xx-HP FlexFabric 11900 IRF Command Reference

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An IRF fabric has only one IRF domain ID. You can change the IRF domain ID with the following
commands: irf domain or mad enable command. The IRF domain IDs configured with these commands
overwrite each other.
Examples
# Set the IRF domain ID to 30.
<Sysname> system-view
[Sysname] irf domain 30
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 4 seconds.
Views
System view
Predefined user roles
network-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. Changing the operating mode from IRF to standalone can cause
loss of the irf link-delay command configuration even if you have saved the configuration.
An IRF link down report delay helps avoid link flapping, which 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.
If the CFD feature is used in the IRF fabric, make sure the delay interval is smaller than the maximum CCM
lifetime. For more information about CFD, see High Availability Configuration Guide.
Examples
# Set the IRF link down report delay to 300 milliseconds.
<Sysname> system-view
[Sysname] irf link-delay 300