We have a cluster of 3 RFS7000 controllers.
One of our SSIDs uses an extended VLAN, i.e. tunnelled to the controller.
The controller is also a DHCP server for clients on the SSID attached to this VLAN, therefore the controller needs an SVI (ip address) valid on that VLAN as well.
Now it seems like a no-brainer that each controller in the cluster would need a different IP address on that VLAN, but is this actually the case? This is how it is set up at the moment, but can anyone confirm that this is definitely correct, or does the failover take care of the same IP address on each controller?
One of the effects of each controller having a different IP address on the VLAN is that the DHCP server is started on all 3 controllers; I presume, however, that there is a method that they use to ensure that they don't issue duplicate IP addresses, although I don't know what that method would be.