topic This depends on the software in Wireless

Configure redundancy between 2 active Cisco Wireless Controllers (5508)

Harold Bueno — Mon, 05 Jul 2021 13:47:02 GMT

We have two (2) WLC 5508 currently in production, each with associated Access Points and Wireless devices. Now we would like to configure the redundancy between the two wireless controllers. I have not done configuring two devices in production with associated APs and Wireless devices so I'd like to get the opinion from the group. Shall I move/copy all APs and wireless devices to the primary WLC before configuring the redundancy? What else should we consider to successfully implement a redundancy between the 2 controllers and without affecting the existing users? Thanks in advance!

WLC #1 --- 12 APs and 170 wireless devices (roaming users between WLC#1 and WLC#2)

WLC #2 --- 8 APs and 170 wireless devices (roaming users between WLC#1 and WLC#2)

roaming users between WLC#1

Leo Laohoo — Mon, 03 Apr 2017 05:39:18 GMT

roaming users between WLC#1 and WLC#2

Inter-controller roaming is not recommended.

If redunancy is key, then put all the APs in one controller and enable HA SSO.

Hi Leo, thank you very much

Harold Bueno — Mon, 03 Apr 2017 07:36:34 GMT

Hi Leo, thank you very much for the quick note and suggestion. It is really appreciated.

Hi again,

Harold Bueno — Tue, 02 May 2017 11:01:20 GMT

Hi again,

What is the maximum cable length allowed for redundancy? Our WLCs are located on different sites with about 1 kilometer apart but a fiber optic cable is available - just waiting for media converter and fiber patch cables to complete the connection.

Thank you

This depends on the software

patoberli — Fri, 05 May 2017 10:59:51 GMT

This depends on the software version you are running. With >7.5 you can run the redundancy port over a switched/routed network and latency isn't anymore that important.

See here for the exact details: http://www.cisco.com/c/en/us/td/docs/wireless/controller/technotes/8-1/HA_SSO_DG/High_Availability_DG.html

The chapter named "High Availability in Release 7.5" is probably the one you're looking at.