If you are using multiple VLANs to manage broadcasts/multicasts, this may not be helping as much as you think. Roughly speaking, resnet, north, and south parts of campus each get a /17. We have an Aruba setup, and they have a writeup about it. It may or may not translate to Cisco world very well.
https://community.arubanetworks.com/t5/Validated-Reference-Design/Single-VLAN-Architecture-for-WLAN/ta-p/508698 -- Jonathan Waldrep Network Engineer Network Infrastructure and Services Virginia Tech On Mon, Jan 27, 2020 at 2:23 PM Carson, Dennis <[email protected]> wrote: > We do use public ip space. > > > > *Dennis Carson* > > *California University of Pennsylvania* > > office: 724-938-4215 > > > > *From:* The EDUCAUSE Wireless Issues Community Group Listserv < > [email protected]> *On Behalf Of *Norton, Thomas > (Network Operations) > *Sent:* Monday, January 27, 2020 2:13 PM > *To:* [email protected] > *Subject:* Re: [WIRELESS-LAN] [External] [WIRELESS-LAN] Chromecasts and > App on Phones > > > > *[External]: *This email originated from outside of California University > of Pennsylvania. > > > > Yep, Google developers in their infinite glory! > > > > Chromecast now complete an HTTP request as part of discovery, as well > require you be on the same SSID for initial setup. > > > > Are you utilizing using public IPs? > > > > If so, I believe the chromecast has some weird mechanisim triggering a 403 > forbidden utilizing different IP spaces when utilizing public space. > > > > Private space should work with in different vlans/subnets. > > *T.J. Norton* > > *Wireless Network Architect* > *Network Operations* > > *Office: (434) 592-6552 <(434)%20592-6552> * > > > > [image: http://www.liberty.edu/media/1616/40themail/wordmark-for-email.jpg] > > *Liberty University | Training Champions for Christ since 1971* > > > > On Jan 27, 2020, at 12:09 PM, Carson, Dennis <[email protected]> wrote: > > > ------------------------------ > > [ EXTERNAL EMAIL: Do not click any links or open attachments unless you > know the sender and trust the content. ] > ------------------------------ > > Hello, > > > > We use Cisco AP’s. We have one ssid for students, but it has multiple > subnets. When the Chromecast and Phone end up on different subnets, they > don’t seem to be able to connect. > > Do any colleges have any workarounds or solutions for this? > > Also, with the way these devices work, does anyone know if they need to be > on the same subnet after the initial registration? Ie IF we use a hotspot > to register them, will they work when they go back to their dorm? > > > Thank you, > Dennis > > > ------------------------------ > > > [image: Cal U Logo] > *The content of this email is confidential and intended only for the > recipient(s) specified. If you received this message by mistake, please > reply so the sender can correct the error, and then delete this email > immediately. Do NOT forward it to a third party without the written consent > of the sender. California University of Pennsylvania is a public agency; > consequently, this email may be subject to disclosure under the > commonwealth’s Right-to-Know Law.* > > ********** > Replies to EDUCAUSE Community Group emails are sent to the entire > community list. If you want to reply only to the person who sent the > message, copy and paste their email address and forward the email reply. > Additional participation and subscription information can be found at > https://www.educause.edu/community > <https://nam02.safelinks.protection.outlook.com/?url=https%3A%2F%2Fwww.educause.edu%2Fcommunity&data=02%7C01%7Ccarson%40CALU.EDU%7C7f193ce75b6645b11aa008d7a35ce42a%7C62727258691648be8f9920635977badd%7C0%7C0%7C637157491680216034&sdata=Tb8H5dh0y2GmIyB7B%2BH1ZK8b35X7PcZc7MS8Fq6KrB8%3D&reserved=0> > > ********** > Replies to EDUCAUSE Community Group emails are sent to the entire > community list. If you want to reply only to the person who sent the > message, copy and paste their email address and forward the email reply. > Additional participation and subscription information can be found at > https://www.educause.edu/community > <https://nam02.safelinks.protection.outlook.com/?url=https%3A%2F%2Fwww.educause.edu%2Fcommunity&data=02%7C01%7Ccarson%40CALU.EDU%7C7f193ce75b6645b11aa008d7a35ce42a%7C62727258691648be8f9920635977badd%7C0%7C0%7C637157491680216034&sdata=Tb8H5dh0y2GmIyB7B%2BH1ZK8b35X7PcZc7MS8Fq6KrB8%3D&reserved=0> > > ********** > Replies to EDUCAUSE Community Group emails are sent to the entire > community list. If you want to reply only to the person who sent the > message, copy and paste their email address and forward the email reply. > Additional participation and subscription information can be found at > https://www.educause.edu/community > ********** Replies to EDUCAUSE Community Group emails are sent to the entire community list. If you want to reply only to the person who sent the message, copy and paste their email address and forward the email reply. Additional participation and subscription information can be found at https://www.educause.edu/community
