Hello,   Vertical failover is virtually instant.  The failover time you are referring to is for entire controller failover, not the vertical port failover.   Regards,   Don 
We have couple PS4110s, PS6110s and PS6210s, all redundantly connected to 2 switches (PS6210s only have configured ETH0 on both controllers). We need to replace one of the switches. I assume once we unplug the cables or turn off the switch, vertical failover should kick in, right? Now the question is HOW long does actually this failover take? I've found some inconclusive information that for the 4110/6110 it might take up to a minute, with 6210 being much faster? Basically will the be connectivity outage for the hosts connected to the arrays and if, how long? Most EQLs currently have active controller on the switch we need to replace. Thanks in advance 
how long does vertical port failover take?