We were told that for a 7240 controller AirGroup was limited to receiving (not necessarily responding to) 200 pps. Given the typical amount of multicast traffic coming from client devices, I would expect 200pps to be reached at a tiny fraction of the 32K devices a 7240 claims to support.
Has anybody that uses Airgroup run into the limit of multicast packets per seconds that can be processed by their controller? If yes, what has been the practical impact of hitting that limit? If no, have you taken active steps to avoid it, or is my thinking incorrect and the multicast pps count is much lower than I expect? Thanks, Chuck From: The EDUCAUSE Wireless Issues Constituent Group Listserv [mailto:WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU] On Behalf Of Wilkinson, Doug Sent: Wednesday, November 30, 2016 9:52 AM To: WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU Subject: Re: [WIRELESS-LAN] support of L2 peering devices? We use our guest SSID for devices that rely on bonjour with airgroups enabled. Multicast overall is disabled, airgroups handles any bonjour communication. We use larger /18 nets mainly to facilitate roaming. Airgroups doesn't care what subnet you are on. Devices on our secure SSID can talk to the guest SSID through airgroups. This past fall, we also enabled the use of fingerprinting to allow certain classes of devices to automatically get onto our guest network without MAC registration (eg. printers, roku, appleTV, etc). We do have clearpass in the mix as well. --Doug Doug Wilkinson Associate Director, Network Technology Group Computing and Information Services Brown University -- On Wed, Nov 30, 2016 at 9:37 AM, Tim Tyler <ty...@beloit.edu <mailto:ty...@beloit.edu> > wrote: Jon We do have the AirGroup functionality enabled. But I also have a pool of 6 /23 vlans. So my first question is did you set up an independent SSID for L2 devices to register? Did you use one vlan (subnet)? What size? I am curious about the details to allow broadcast, but I am guessing I can ask that of an Aruba engineer if I need. The ability to allow broadcast seems critical to getting Chromecast to work. Tim From: The EDUCAUSE Wireless Issues Constituent Group Listserv [mailto:WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU <mailto:WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU> ] On Behalf Of Jonathan Miller Sent: Wednesday, November 30, 2016 8:27 AM To: WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU <mailto:WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU> Subject: Re: [WIRELESS-LAN] support of L2 peering devices? Tim, The AirGroup functionality in Aruba ClearPass is probably what you're looking for. You can set it up so that when students register their devices, they can choose whether those devices are allowed to use broadcast/multicast to talk to their other devices, or even allow sharing to other users (potentially, depending on your setup). We've seen it work fairly well, although sometimes a chromecast or something will freak out and lose connectivity briefly with devices that it's supposed to be allowed to talk to. Jon Miller Network Analyst Franklin and Marshall College Jonathan Miller Network Analyst Franklin and Marshall College On Wed, Nov 30, 2016 at 9:22 AM, Tim Tyler <ty...@beloit.edu <mailto:ty...@beloit.edu> > wrote: Wireless Lan members, We use Aruba Networks for our wireless solution and we do have many L2 devices working that leverage Bonjour, etc. We simply do mac address authentication for them. Most L2 devices work fine. My big goal is to find out the different methods that some of you might be using to support the most difficult L2 devices such as Chromecast, Sonos speakers, and other L2 devices that need to peer with another device in order to work. These type of devices ultimately need to broadcast to see each other. Chromecast generally needs to broadcast to the phone app so that the phone app can see it and establish a connection with one another. If you create another SSID for it, what are the key factors in making it work? Back in the earlier Fall, a number of you stated that you were using /16 subnets or very large subnets so that you only needed one subnet for your residential wireless network. So the question I have is did you do this to better support L2 devices? If so, do you allow broadcasts on your large wireless subnet or did you simply do one /16 subnet to simplify the administration of your wireless network? Bottom line, how are some of you supporting L2 devices that allow Chromecast and other peering L2 devices to work? Tim Tyler Network Engineer Beloit College ********** 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/. ********** 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/. ********** Participation and subscription information for this EDUCAUSE Constituent Group discussion list can be found at http://www.educause.edu/groups/.
