[cisco-voip] 7925s across campus

[Scott Voll]

But what would keep you from having 4 or 5 different SSID and set 1/4 or 1/5
of them to a different SSID / Subnet?

Yes it burns 4 or 5 WLANs but then the subnet size would be smaller.

But as Mike also pointed out.... there are features to take care of it as a
large WLAN.

Scott

On Wed, Oct 13, 2010 at 11:12 AM, Lelio Fulgenzi <lelio at uoguelph.ca> wrote:

> We do something similar on our wireless network, granted, without voice so
> far.
>
> One of the biggest advantages of having all hosts on the same subnet is
> roaming. Roaming across subnets begins to introduce some difficulty and
> complexity.
>
>
>
> ---
> Lelio Fulgenzi, B.A.
> Senior Analyst (CCS) * University of Guelph * Guelph, Ontario N1G 2W1
> (519) 824-4120 x56354 (519) 767-1060 FAX (JNHN)
> ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
> Cooking with unix is easy. You just sed it and forget it.
>                               - LFJ (with apologies to Mr. Popeil)
>
>
> ------------------------------
> *From: *"Mike King" <me at mpking.com>
> *To: *"cisco-voip (cisco-voip at puck.nether.net)" <
> cisco-voip at puck.nether.net>
> *Sent: *Wednesday, October 13, 2010 2:06:47 PM
> *Subject: *Re: [cisco-voip] 7925s across campus
>
>
> Hey Jason.
>
> The VLAN would be terminated on the Wireless LAN controller, so
> technically the VLAN would not be across multiple buildings. (The AP's
> take care of getting the traffic back to the WLAN controller)
>
> The WLAN controller also does broadcast filtering, which would
> alleviate the issue with having all those clients in a /16.
>
> I can take a stab at the reasons they want them in the same Subnet.
> A. They don't want to make more than 1 subnet for ease of ACL
> B. They most likely want to use the PTT (Push to talk) button as a
> walkie talkie/Nextel type service. The PTT requires multicast. They
> might be mistakenly thinking that by being in the same subnet, they
> won't have to enable multicast on the wireless LAN.
>
>
> To throw some general advise, remember to disable ALL client load
> balancing features on the WLAN controllers, as they will degrade
> performance horribly. Also remember to turn Peer to Peer Blocking off,
> as it will prevent phone calls to each other.
>
> I'm in contact with several large colleges, and they routinely run /16
> on they're wireless LAN. They haven't run into any specific issues
> with Subnets being that large.  Personally, I think it might be a
> little more sane to break it up into something smaller.
>
> Mike
>
>
> On Wed, Oct 13, 2010 at 1:04 PM, Jason Aarons (US)
> <jason.aarons at us.didata.com> wrote:
> > Customer is looking at about 800 7925s across a campus, they mentioned
> > having a single 7925 voice vlan (10.x.x.x/16) across all Wireless LAN
> > Controllers (4400s) for the whole campus for these 7925s.  This doesn’t
> > sound good having all 7925s on same subnet across multiple buildings.
> >
> >
> >
> > What are others doing as the Enterprise Mobility Guide 4.1 doesn’t give
> much
> > thought.
> >
> > ________________________________
> >
> > Disclaimer: This e-mail communication and any attachments may contain
> > confidential and privileged information and is for use by the designated
> > addressee(s) named above only. If you are not the intended addressee, you
> > are hereby notified that you have received this communication in error
> and
> > that any use or reproduction of this email or its contents is strictly
> > prohibited and may be unlawful. If you have received this communication
> in
> > error, please notify us immediately by replying to this message and
> deleting
> > it from your computer. Thank you.
> >
> > _______________________________________________
> > cisco-voip mailing list
> > cisco-voip at puck.nether.net
> > https://puck.nether.net/mailman/listinfo/cisco-voip
> >
> >
>
> _______________________________________________
> cisco-voip mailing list
> cisco-voip at puck.nether.net
> https://puck.nether.net/mailman/listinfo/cisco-voip
>
> _______________________________________________
> cisco-voip mailing list
> cisco-voip at puck.nether.net
> https://puck.nether.net/mailman/listinfo/cisco-voip
>
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <https://puck.nether.net/pipermail/cisco-voip/attachments/20101013/892903c0/attachment.html>