03-27-2016 11:47 PM - edited 07-05-2021 04:49 AM
Dear Experts,
I am preparing some Project Documentation for a wireless solution and we are using wlc 8540 in HA mode. For HA , WLC will send keepalive updates on every 100msec to check the Status of Hotstandby unit via RP Port. But in documentation i am required to put exact failover time. So can i assume that on 101th msec , failover will happen? and for that i need to provide some cisco docs in which exact failover timers are mentioned.
can you please guide me on this.?
cheers,
Thanks,
waqas
Solved! Go to Solution.
03-28-2016 02:51 AM
Hi Waqas,
Try this document: High Availability Tech Note
The time it takes for failover in case of power failure on an Active Box also depends on the Keepalive timer configured on the WLC (configured for 100 msec by default). The algorithm it takes to decide the failover is listed here:
In the case of a Network Failover (that is, the Active WLC cannot reach its gateway for some reason), it may take 3-4 seconds for a complete switchover depending on the number of APs in the network.
Cheers,
Ric
03-28-2016 02:51 AM
Hi Waqas,
Try this document: High Availability Tech Note
The time it takes for failover in case of power failure on an Active Box also depends on the Keepalive timer configured on the WLC (configured for 100 msec by default). The algorithm it takes to decide the failover is listed here:
In the case of a Network Failover (that is, the Active WLC cannot reach its gateway for some reason), it may take 3-4 seconds for a complete switchover depending on the number of APs in the network.
Cheers,
Ric
03-28-2016 03:34 AM
Dear Ric,
Thanks for sharing this valuable info. Surely it will help me to have them in our wireless Deliverables as a reference.
cheers ;)
Thanks,
waqas
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