Forum Discussion
SSHSSH_97332
Nimbostratus
Nimbostratuslink down-time on failover , what does it mean ?
i cannot
understand
the below , does this mean that when unit is in standby its interfaces are down ?
Specifying
the link down-time on failover
When
configuring a unit of a redundant system configuration, you can use
the
Link Down Time on Failover setting to specify the amount of time, in
seconds,
that interfaces for any VLANs on external devices are down when
the
unit fails over and goes to a standby state. Specifying a value other than
0
for this setting causes other vendor switches to use the specified time to
learn
the MAC address of the newly-active unit.
The
allowed value for this setting is 0 to 10. Setting the value to 0 disables
this
setting.
- This setting is used to trigger a failover based on a VLAN failure for a pair of BIG-IPs configured for high availability. Normally a failover is triggered when a standby BIG-IP loses contact with the active unit. You can see this effect if you pull the serial (or network) failover cable on an HA pair, both will become active units. Normally losing a VLAN will not trigger a failover however this setting allows for that functionality. Hope that clarifies.
-George 
SSHSSH_97332Thanks alot , but this will be for which Vlan or which port ? all ?
nitassEmployee
you can use the Link Down Time on Failover setting to specify the amount of time, in seconds, that interfaces for any VLANs on external devices are down when the unit fails over and goes to a standby state.when unit fails over to peer, all interfaces will be down for configured seconds in link down time setting.- SSHSSH_97332Thanks , but i'm now confused . is it :
when Fail over happens the interfaces will be down on standby unit for this mount of time ?
or
Normally losing a VLAN will not trigger a failover however this setting allows for that functionality. It is the amount of time the interfaces on the standby will be down after failover.
