Wireless Access

Hi Team:

 

Backup LMS IP can be used for topologie Master-Local?

 

Regards,

If the controllers are in different subnets, then yes, you can use backup-lms as a redundancy option. This happens at L3 instead of L2 with VRRP. The AP has to reboot. 

Hello Tim,

 

Thanks for this answer. So I guess that for a Master-Local topology L3 connectivity between the two controllers is sufficient, right?

 

I ask this because I have a project with two Mobility Controllers. We are hesitating between a Master / Backup Topology (Need of L2 connectivity) and a Master / Local Topology (Apparently L3 connectivity is sufficient).

 

Customer would like to install the WLC inside two different sites (with L3 connectivity only) for a DRP plan. I'm just wondering what is the impact of using Master Local instead of Master / Master backup.

 

In that conditions are the following sentences correct?

-With Master-Local, we can use a kind of active:active topology (terminating some AP on the master and some other on the local) which is not the case with Master-Backup.

-Redundancy and move of the AP on the recovery controller will take more time with the Master-Local (L3) design because an AP reboot is needed (via backup LMS). With the Master / Master as we are using VRRP and L2 not reboot required, failover much more efficient.

-In case the master goes down, we loose ARM but APs still continue working on the local during 30 days (licenses)

 

All your other remarks are welcome,

 

Best regards,

Jérôme

 

 

 

All 3 are true, however when using HA fast failover, 2 only applies if you failover to a 3rd non-HA controller.