Re: [WIRELESS-LAN] WLC Mobility Groups

2017-11-15 Thread Jeffrey D. Sessler 
As far as I know, mobility scales with the controllers, and the limit is 24 
controllers in the same mobility group. With a mobility list (bundle of 
different mobility groups) you can have up to 72 members. 24 8540's would get 
you 144,000 WAPs in a single mobility group. 

Jeff

On 11/15/17, 7:58 AM, "The EDUCAUSE Wireless Issues Constituent Group Listserv 
on behalf of Eriks Rugelis"  wrote:

FWIW, our Keele campus has twelve WLC5508's which together support approx. 
4900 APs.  We have a single Mobility Group configured for all APs located at 
this campus.  The campus has daily peaks of approx. 25K concurrent devices 
associated.   We are not aware of any operationally 'bad' system behaviour 
related to mobility group configuration which is impacting the ability of our 
end-users to successfully use the service.   Perhaps we aren't paying enough 
attention to the relevant metrics?

We are presently running v8.0.152.0 and are pre-production testing v8.5 due 
to imminent deployment of AP1815w's in residence buildings.

Eriks Rugelis,
Manager, Network Development
York University, Toronto

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Re: [WIRELESS-LAN] WLC Mobility Groups

2017-11-14 Thread Curtis K. Larsen 
Yes I remember having similar PMK messages.  Thanks for the input.

-Curtis


From: The EDUCAUSE Wireless Issues Constituent Group Listserv 
<WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU> on behalf of Jung Suk Park 
<jungp...@umd.edu>
Sent: Tuesday, November 14, 2017 7:34 AM
To: WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU
Subject: Re: [WIRELESS-LAN] WLC Mobility Groups

Hello Curtis,

Based on my experiences, there are limitations like how many clients and APs 
and authentication information can be handled by one controller under mobility 
group.
I found a document for RF group's limitations, but could not find anything for 
a mobility group.

We used to have 2 dozens of 5508s with about 5K access points under one 
mobility group, but couldn't see if it worked or not.
However, while I was debugging something else, I saw a lot of PMK related 
errors/logs and it indicated that the controller could not handle all those 
information from other mobility group WLCs.

I personally won't try to put more than 4 WLCs under one mobility group if WLCs 
are running with max capacity.

I hope it helps.

Jung Park




On Mon, Nov 13, 2017 at 6:36 PM, Curtis K. Larsen 
<curtis.k.lar...@utah.edu<mailto:curtis.k.lar...@utah.edu>> wrote:
Hi All,

Several years ago before the advent of the "bonjour gateway" and the "multicast 
vlan" feature and before I understood the difference between multicast-unicast 
and multicast-multicast we got hammered by multicast pretty good - some wired 
uplinks were flogged with just CAPWAP/multicast overhead.  At that time we had 
a single mobility group for all of our WLCs and multicast going everywhere.  
Long story short - I broke up the mobility groups, etc, etc. and things 
improved by leaps and bounds.

Fast forward several years later and with half as many controllers and probably 
twice as many APs but having much better tools for controlling multicast I find 
myself wanting to try a single mobility group again.  I am wondering if any of 
you out there are using a single mobility group with 5 or more WLCs and 7-10K 
or more APs on your campus.  If so - I'd love to exchange a few emails with you 
off list.

Thanks,

--
Curtis K. Larsen
Senior Network Engineer
University of Utah IT/CIS
Office 801-587-1313

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Re: [WIRELESS-LAN] WLC Mobility Groups

2017-11-14 Thread Jung Suk Park 
Hello Curtis,

Based on my experiences, there are limitations like how many clients and
APs and authentication information can be handled by one controller under
mobility group.
I found a document for RF group's limitations, but could not find anything
for a mobility group.

We used to have 2 dozens of 5508s with about 5K access points under one
mobility group, but couldn't see if it worked or not.
However, while I was debugging something else, I saw a lot of PMK related
errors/logs and it indicated that the controller could not handle all those
information from other mobility group WLCs.

I personally won't try to put more than 4 WLCs under one mobility group if
WLCs are running with max capacity.

I hope it helps.

Jung Park




On Mon, Nov 13, 2017 at 6:36 PM, Curtis K. Larsen 
wrote:

> Hi All,
>
> Several years ago before the advent of the "bonjour gateway" and the
> "multicast vlan" feature and before I understood the difference between
> multicast-unicast and multicast-multicast we got hammered by multicast
> pretty good - some wired uplinks were flogged with just CAPWAP/multicast
> overhead.  At that time we had a single mobility group for all of our WLCs
> and multicast going everywhere.  Long story short - I broke up the mobility
> groups, etc, etc. and things improved by leaps and bounds.
>
> Fast forward several years later and with half as many controllers and
> probably twice as many APs but having much better tools for controlling
> multicast I find myself wanting to try a single mobility group again.  I am
> wondering if any of you out there are using a single mobility group with 5
> or more WLCs and 7-10K or more APs on your campus.  If so - I'd love to
> exchange a few emails with you off list.
>
> Thanks,
>
> --
> Curtis K. Larsen
> Senior Network Engineer
> University of Utah IT/CIS
> Office 801-587-1313
>
> **
> Participation and subscription information for this EDUCAUSE Constituent
> Group discussion list can be found at http://www.educause.edu/discuss.
>

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