HP 6125XLG R2306-HP 6125XLG Blade Switch IRF Command Reference - Page 13

[Sysname] irf domain 10 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 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. HP recommends setting the delay to 0 seconds in one of the following situation: • The IRF fabric requires a fast master/subordinate or IRF link switchover. • The BFD or GR feature is used. 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. system-view [Sysname] irf link-delay 300 irf mac-address persistent Use irf mac-address persistent to configure IRF bridge MAC persistence. 10