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Has anyone installed Cisco WISM2 blades? Any problems or caveats?

-Jeff Legge

Radford University

********** Participation and subscription information for this EDUCAUSE Constituent Group discussion list can be found at http://www.educause.edu/groups/.

Comments

Having suffered every WiSM defect known to man and probably a few others over the years, including frequent weird spats between the 6500 and the controller, we're moving away from the service module-based controllers to 5508 appliances. 

The trade-off? For some reason, the biggest networking hardware company in the world won't give users a 10 Gig interface on the 5508 and you have to find 8 single Gig interfaces to connect the box to.

...Sigh.


Lee H. Badman
Wireless/Network Engineer, ITS
Adjunct Instructor, iSchool
Syracuse University
315.443.3003
Message from chris@mit.edu

We migrated to 16 WISM2s from 18 original WISMs a few months ago, so far no issues, and the increased performance has been noticeable.  Our WISMs were running at a pretty high cpu load, the WISM2s tick along at a nice low load.  Our last firmware update was also a smooth process, we had problems pre-loading firmware to APs with the original WISMs but pre-loading with the WISM2s was not a problem.

-Chris

Message from joe@usf.edu


We too have been running the WiSM2's without any problems.  The 1000-AP support and 10G backplane connections are handy. 

The only 'issue' we have faced is large multicast load thanks to ridiculous amounts of mDNS traffic, but that's not the controller's fault.

Joe

On 05/01/2012 12:41 AM, Chris Murphy wrote:
We migrated to 16 WISM2s from 18 original WISMs a few months ago, so far no issues, and the increased performance has been noticeable.  Our WISMs were running at a pretty high cpu load, the WISM2s tick along at a nice low load.  Our last firmware update was also a smooth process, we had problems pre-loading firmware to APs with the original WISMs but pre-loading with the WISM2s was not a problem.

-Chris

Message from j2robert@odu.edu

The only caveat I ran into when first installing them last summer was the requirement for 12.2.33-SXJ on the chassis, but the need for an upgraded IOS image on the switch is understandable as it was a new module at the time.  Since then I’ve been running three of them across two chassis with my residential APs on them and they’ve performed great.  And we’re replacing the remaining WiSMs with WiSM2s this summer.

 

Josh Robertson

Network Systems Senior Engineer

Old Dominion University

Office of Computing & Communications Services

(757)683-5046

j2robert@odu.edu

http://occs.odu.edu/

 

Message from jeffrey.farese@uconn.edu

We have been using the WISM2's for just about a year without issue. If you have any specific questions feel free to send me an email. Jeff Farese Network Design & Engineering University of Connecticut
Hi, Chris.

Just wondering what AP license you are using at WiSM-2, since you used 16 WiSM-2 to replace 18 WiSM. 

Leo Song, Senior Analyst & Cluster Lead
Computing and Communication Services - Networking and Security
University of Guelph
(519) 824-4120 x 53181

From: "Chris Murphy" <chris@MIT.EDU>
To: WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU
Sent: Tuesday, 1 May, 2012 12:41:29 AM
Subject: Re: [WIRELESS-LAN] WISM2

We migrated to 16 WISM2s from 18 original WISMs a few months ago, so far no issues, and the increased performance has been noticeable.  Our WISMs were running at a pretty high cpu load, the WISM2s tick along at a nice low load.  Our last firmware update was also a smooth process, we had problems pre-loading firmware to APs with the original WISMs but pre-loading with the WISM2s was not a problem.

-Chris

Hello Jeff, On our central campus, we've installed two WiSM2s several months ago with no issues or problems. One of the WiSM2s is almost fully loaded with 500 WAPs while the other in a separate chassis is empty to be used for failover of a single module. We are running 12.2(33)SXJ on two 6500s and 7.0.230.0 on the WiSM/WiSM2s (we have a mix of both modules in each chassis). We have architected the wireless infrastructure using a 6500 chassis in two separate locations and tied both chassis together with a port channel, trunking the vlans of the WLANs configured with GLBP on the L3 interfaces. The fibers between the two locations are run in diverse paths. On our medical campus, we've configured the wireless to support that campus in the same manner. In total, for both campuses, we have 31 controllers (4404s, WiSM and WiSM2s), ~3500 WAPs and growing (mix of anything from 1220s to 3502s) and an average of 16K clients all managed with the NCS (1.1.0.58). We are mainly broadcasting three SSIDs (802.1x, open that requires vpn connection and guest that is tunneled beyond our campus edge) in dorms, common areas and classrooms. Overall, very satisfied with the Cisco wireless gear. Only caveat is that you need to be running the proper code on all devices. We have found that our biggest issue is with wireless clients acting badly which is out of our control. Ed Nelson Boston University ------------------------------ Date: Mon, 30 Apr 2012 20:12:23 -0400 From: "Legge, Jeffry" Subject: WISM2 --_000_07AED3BE1CC43740B70BD12F81C801880775328A09MLEXCM01RADFO_ Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable Has anyone installed Cisco WISM2 blades? Any problems or caveats? -Jeff Legge Radford University ********** Participation and subscription information for this EDUCAUSE Constituent Group discussion list can be found at http://www.educause.edu/groups/.
Message from curtis.k.larsen@utah.edu

Jeff, We discovered this one after a few days on WISM2's: CSCtx69189 -- WISM2 multicast IGMP proxy delay under load It will only affect real-time multicast type stuff. So for us it's a 9 second delay on vocera push-to-talk. It does not happen on WISM1. It might be less likely to occur on 5508's depending on client and AP load. They are working on it. Curtis Larsen University of Utah Network Engineer ________________________________________
On Mon, Apr 30, 2012 at 08:12:00PM -0400, Legge, Jeffry wrote: > > Has anyone installed Cisco WISM2 blades? Any problems or caveats? We upgraded all of our WiSM controllers to WiSM2 last August and have been quite happy with the results. The WiSM2s are supporting 5,334 APs in roughly 170 buildings and sites. We have a mix of AP models, mostly 1242s and 1142s and including several hundred 3502s. Peak client count in the last semester reached over 28K. The WiSM2s have been stable and the greatly increased CPU capacity has made code upgrades much easier to achieve, given the ability to simultaneously download code into all APs. That made it possible to upgrade a controller with 300 APs in approx 10 minutes as timed from typing "reset system" to when all APs are back up and joined and clients being acquired. The speed of AP upgrades makes it possible to dispense with AP predownload. -Charles Charles E. Spurgeon / UTnet UT Austin ITS / Networking c.spurgeon@its.utexas.edu / 512.475.9265 ********** Participation and subscription information for this EDUCAUSE Constituent Group discussion list can be found at http://www.educause.edu/groups/.
When the 5500 series were under development, 10GB was still very rare. I remember having a conversation with the project lead, and while I had the same concern about the lack of 10GB, I came away thinking they had made the right choice. Now that I've lived with the 5508s, I've yet to see traffic loads high enough to even justify the four 1GB connections I'm using on each one.
 
Jeff
 
>>> On Monday, April 30, 2012 at 6:14 PM, in message <943DA0E70434CA499AD0088FB90EAADE22B6FE@SUEX10-mbx-05.ad.syr.edu>, Lee H Badman <lhbadman@SYR.EDU> wrote:
Having suffered every WiSM defect known to man and probably a few others over the years, including frequent weird spats between the 6500 and the controller, we're moving away from the service module-based controllers to 5508 appliances. 

The trade-off? For some reason, the biggest networking hardware company in the world won't give users a 10 Gig interface on the 5508 and you have to find 8 single Gig interfaces to connect the box to.

...Sigh.


Lee H. Badman
Wireless/Network Engineer, ITS
Adjunct Instructor, iSchool
Syracuse University
315.443.3003
Message from me@mpking.com

I had a conversation with sales at an executive briefing, and they mentioned that the option of a 10gig addon module (far right hand side of the front) was being considered.

Granted, this was a sales person, and no NDA was signed, so I'm not sure how much stock I put in it.

Mike

Message from chris@mit.edu

Leo,

Currently we're at 500 APs per WiSM2, I'll probably bump that up some to maintain full redundancy between the 2 data centers we have the WiSMs at.

-Chris

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