RP port connectivity between 5508 WLCs

[vijay kumar]

Hi all ,

Is it possible to connect the WLC RP ports via switch to acheive redundancy? Since we are having the WLC's in different building. If it is possible what is the configuration we need to do in switch side?

Thanks.

Vijay

[Abhishek Abhishek]

After the WLCs are configured with Redundancy Management and Peer Redundancy Management IP Addresses and Redundant Units are configured, it is time to enable SSO. It is important to make sure that physical connections are up between both the controllers (that is, both the WLCs are connected back to back via the Redundant Port using an Ethernet cable) and the uplink is also connected to the infrastructure switch and the gateway is reachable from both the WLCs before SSO is enabled. Once SSO is enabled, it will reboot the WLCs. While it boots, the WLCs negotiate the HA role as per the configuration via Redundant Port. If the WLCs cannot reach each other via Redundant Port or via the Redundant Management Interface, the WLC configured as Secondary may go in to Maintenance Mode.

[japartridge]

I have the same question/issue as Vijay.  We configured our WLC's on the bench, enabled SSO, the 5508's rebooted and all was well... that is until I physically moved one of the WLC's to it's final home.  Now regardless what switchport configuration I give the RP ports show redundancy summary is always showing Peer State = UNKNOWN - Communication Down.  The odd thing is that I can ping both the RP IP, and the Peer RP IP with no issues, full replies, etc....

Does anyone know the Cisco recommended port configurations on the switches for the Redundancy Ports?  Are there any limitations as to type/model of switches used for the RP communication?  I have a layer 2 VLAN, I've tried the ports as trunks, access ports, untagged access ports, trunks with Native VLAN of the L2 RP VLAN, trunks with the Native VLAN of Redundancy management VLAN, etc...

If anyone can help with this it will be very much appreciated!