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5508 WLC HA pair - change management interface settings

-0001-11-30   Views:5

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Hi, We have a pair of 5508 WLC's in a HA configuration that is working well at the moment, however I have noticed that the management interface is configured as untagged. I would like to change this to tagged and change the attached switch to trunk f

Hi,
We have a pair of 5508 WLC's in a HA configuration that is working well at the moment, however I have noticed that the management interface is configured as untagged. I would like to change this to tagged and change the attached switch to trunk for these devices but if I try and edit the management interface through the GUI the VLAN and IP address section is greyed out and cannot be changed. While I could attempt it through the CLI and am comfortable doing that, the fact that it cannot be changed through the GUI implies that this should not be changed and so I am after further information. I don't have any lab equipment other than the HA pair in production so I cannot try changing it through the CLI at the moment. 
The WLC's are in LAG mode if that makes any difference. I realise there may be downtime required for making this change but I am trying to work out the steps to get this done without having to drastically reconfigure things. 
Any assistance would be appreciated. 

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Introduction of New Interfaces for HA Interaction
Redundancy Management Interface
The IP address on this interface should be configured in the same subnet as the management interface. This interface will check the health of the Active WLC via network infrastructure once the Active WLC does not respond to Keepalive messages on the Redundant Port. This provides an additional health check of the network and Active WLC, and confirms if switchover should or should not be executed. Also, the Standby WLC uses this interface in order to source ICMP ping packets to check gateway reachability. This interface is also used in order to send notifications from the Active WLC to the Standby WLC in the event of Box failure or Manual Reset. The Standby WLC will use this interface in order to communicate to Syslog, the NTP server, and the TFTP server for any configuration upload.
Redundancy Port
This interface has a very important role in the new HA architecture. Bulk configuration during boot up and incremental configuration are synced from the Active WLC to the Standby WLC using the Redundant Port. WLCs in a HA setup will use this port to perform HA role negotiation. The Redundancy Port is also used in order to check peer reachability sending UDP keep-alive messages every 100 msec (default timer) from the Standby WLC to the Active WLC. Also, in the event of a box failure, the Active WLC will send notification to the Standby WLC via the Redundant Port. If the NTP server is not configured, a manual time sync is performed from the Active WLC to the Standby WLC on the Redundant Port. This port in case of standalone controller and redundancy VLAN in case of WISM-2 will be assigned an auto generated IP Address where last 2 octets are picked from the last 2 octets of Redundancy Management Interface (the first 2 octets are always 169.254).

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