11-17-2010 02:49 PM - edited 07-03-2021 07:25 PM
Hi all,
With a N+1 WLC deployment, is it possible to disable layer 3 roaming while enabling Mobility group feature on the backup controller ?
based on the network setup layer 3 mobility is not required.However, we need to both controllers to exchange all security related parameters so that excluded clients info etc will be in sync during a failover scenario.
I do not intend to use ACLs as such.
Any thoughts much appreciated.
cheers,
Janesh
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11-18-2010 04:25 AM
Janesh,
seems like there is nothing for you to do. Let me clarify my thoughts so you can tell me if I saw correctly your concern :
-If buildings are separate, the case that a laptop roams from the coverage of 1 WLC to the coverage of another WLC will never happen right ? So if this is not going to happen, layer 3 roaming will never happen either.
-If no layer 3 roaming is happening, no extra load is affecting the WLC.
Nicolas
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11-17-2010 11:38 PM
Hi Janesh,
let me ask for several clarifications.
-Why exactly do you want to block layer 3 roaming ? How does it impact you as anyway it's transparent for the network ?
-Does that mean that you're ok with layer 2 roaming ? If yes, just configure all WLCs to serve the same subnets for the clients.
Nicolas
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11-18-2010 03:53 AM
Hi Nicolas,
Many thanks for the reply.
Let me throw some light on the matter
-Why exactly do you want to block layer 3 roaming ?
Buildings are miles apart so roaming will only happen within a building and it will be intra controller.
Also I have seen on cisco doco that Layer 3 roaming is not preferred.
How does it impact you as anyway it's transparent for the network ?
As I mentioned layer 3 roaming is not required so I don't see a point enabling it.Why tax the controller unnecessarily?
One controller serves all the APs at one data centre and the other is the backup.No salt and pepper scenario.
-Does that mean that you're ok with layer 2 roaming ? If yes, just configure all WLCs to serve the same subnets for the clients
Layer2 roaming will happen within the controller as primary and backup controllers are Layer -3 separated.
There is no layer 2 adjacency between the controllers.
over to you
cheers,
Janesh
11-18-2010 04:25 AM
Janesh,
seems like there is nothing for you to do. Let me clarify my thoughts so you can tell me if I saw correctly your concern :
-If buildings are separate, the case that a laptop roams from the coverage of 1 WLC to the coverage of another WLC will never happen right ? So if this is not going to happen, layer 3 roaming will never happen either.
-If no layer 3 roaming is happening, no extra load is affecting the WLC.
Nicolas
===
don't forget to rate answers that you find useful
11-18-2010 05:51 PM
yeap. you are correct.Looks like I have being overly cautious on mobility group.
Thanks clearing my doubt.
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