Force Port Down

When operating in VRRP configuration, this capability lets you force down electrically, (for a short period), physical ports belonging to a VLAN when the VLAN is disabled due to Interface Grouping activation. This allows the switches to which these ports are connected to clear their MAC tables and prevents them from continuing to send traffic to the wrong AppDirector platform.

This capability can be configured (AppDirector -> Redundancy -> Global Configuration) or CLI (redundancy force-down-ports-time command) using the following parameter:

 

Parameter	Description
Force Down Ports Time	The period of time for which the port must be down. The values can be either 0 (the feature is disabled), or between 2 and 60 seconds. When enabled, the value to be used depends on how long it takes the switch to clear its MAC tables.

Notes:  

Upon failovers, printouts displayed for ports down and up have extra 2 seconds delay (in addition to the value set in force-port-down-time).

This capability is supported only for one VLAN per platform.

This capability does not function when VRRP is not enabled and there is no VLAN configured as part of the VRRP interfaces.