Luke, it looks like that presentation isn't public. Can you say more about Cisco's recommendations on that? Or are they simply saying /21 is the maximum recommended size? I'd also be interested in anything they said about mcast as it relates to size.
I've setup vlan select on a test WLAN with the intent of breaking up my /21 into smaller pieces for the fall, but I've had no problems with it (though mcast is off). But I thought I would use smaller subnets since our wireless use has gone up quite a bit in recent years and doing it is so simple to do now. I've heard conflicting info, and to my surprise one time a TAC engineer suggested they should be no larger than /24, which I think is erroneous. Mark On Tue, Jul 31, 2012 at 2:43 PM, Luke Jenkins <ljenk...@weber.edu> wrote: > What type of gear are you using? > > Cisco is now recommending using /21s for their unified wireless gear > (Sujit Ghosh, Cisco Live US 2012 BRKEWN-2010, Slide 75). > > > -Luke > > =-=-=-=-=-=-=-=-=-=-=-= > Luke Jenkins > Network Engineer > Weber State University > > > On Jul 31, 2012, at 11:59 AM, Craig Simons <craigsim...@sfu.ca> wrote: > > > All, > > > > We are looking at re-engineering our wireless networking IP space and > I'm wondering what type of boundaries other have pushed their networks to. > We are currently using /22 networks (14 of them) most of which during a > busy period of the day will run around 75-80% utilization (at least as far > as DHCP assignments go). When I look at most APs during the day, I see that > most APs have users belonging to several networks (roaming), and as we have > multicast disabled, it would seem that the advantages of segregating > wireless networks on the basis of limiting broadcast domain are moot. Is > anyone running /21 networks or larger? > > > > We've investigated NAT, but accurately logging internal-external IP > address assignments for our users has proven difficult. Our vendor also > doesn't currently support any type of "VLAN pooling" feature. > > > > Interested in your opinions, > > Craig > > > > > > > > -------------------------------------- > > Craig Simons > > Network Operations > > Simon Fraser University > > Burnaby BC, Canada > > em. craigsim...@sfu.ca > > ph. 778-782-8036 > > ce. 604-649-7977 > > tw. twitter.com/simonscraig > > -------------------------------------- > > ********** Participation and subscription information for this EDUCAUSE > Constituent Group discussion list can be found athttp:// > www.educause.edu/groups/. > > ********** > Participation and subscription information for this EDUCAUSE Constituent > Group discussion list can be found at http://www.educause.edu/groups/. > ********** Participation and subscription information for this EDUCAUSE Constituent Group discussion list can be found at http://www.educause.edu/groups/.
