Configuring Delay Time for Notifying VE Down Event
When all the ports in the VLAN go into an inactive state (for example, the non-forwarding
state), the device notifies the Layer 3 protocols of the VE down event only after
the configured timer expires. Once the timer expires, the device checks if any of
the ports is in the forwarding state. If no ports are in the forwarding state, the
device notifies the Layer 3 protocols of the VE down event. If any of the ports is
in the forwarding state, the device ignores the down event.
While the timer is running, if any of the ports comes into forwarding state, the device cancels the timer and does not notify the VE down event to the protocols.
Note: In
the case of multiple flaps, if any of the ports comes into forwarding state before
the delay notification timer expiry then the device cancels the timer and a fresh
timer is started during port down event. Incase of continuous flaps where flap
time
is less than delay notification timer, the flaps can be detected by other methods
like port statistics or drop in traffic or by the convergence logs of Layer 2
loop
detection protocols.
Suppressing the link status notification allows a quick port status change and recovery to occur without triggering any of the changes that are necessary when a port stays down.
By default, the delay time is not configured.