Good call on the multiple helpers. Several years ago we were using Cisco HSRP on some subnets with 2 SVIs. I had a testing issue with an external wired NIC in a game console. With HSRP, both SVIs use their helpers to respond to DHCP requests. The client basically gets 2 identical offers from the same server. This client would accept the first offer & reject the second. This meant the client would not get an ip address. For the duration of my testing, removed HSRP from this subnet, using a single SVI.
Bruce Osborne Senior Network Engineer Network Operations - Wireless (434) 592-4229 LIBERTY UNIVERSITY Training Champions for Christ since 1971 From: Michael Dickson [mailto:mdick...@nic.umass.edu] Sent: Saturday, August 26, 2017 4:05 PM Subject: Re: Move In/Opening Week- Any Problems? Just a thought but do you have multiple helper addresses configured for that vlan/subnet? I'm wondering if maybe the printers aren't expecting that. Another random thought, if they're not broadcasting for a lease because they require a static could they have maybe all self-assigned themselves the same IP and are discovering each other over L2? Good luck. We're pretty much going down the same CPPM/Airgroup path right now. Mike Michael Dickson Network Engineer Information Technology University of Massachusetts Amherst 413-545-9639<tel:413-545-9639> michael.dick...@umass.edu<mailto:michael.dick...@umass.edu> PGP: 0x16777D39 On Aug 26, 2017, at 3:18 PM, Michael Davis <da...@udel.edu<mailto:da...@udel.edu>> wrote: First Semester supporting mDNS in production with Aruba Clearpass Airgroup. Almost every Epson XP series printer is complaining of duplicate IP addresses which of course is not the case. Anyone see anything similar? There are a few older web searches about Epson's requiring a static IP, which isn't an option right now unfortunately. Only Freshmen moving in today (~5K), the bulk (~20K) will arrive tomorrow and throughout the week. ArubaOS 6.5.3.2 CPPM 6.6.7.96909 Four 7240 controllers ~3200 APs Three primary SSIDs: eduroam, Devices, Guest (clearpass) thanks mike On 8/25/17 9:22 AM, Lee H Badman wrote: It might be beneficial to share notes in case other schools are hitting common problems. I’m wondering how everyone who is in the thick of it is faring with back-to-school? On this end, we are doing OK halfway to our expected total daily peak clients (we’re at 15K now high water mark). Our significant WLAN-related changes since end of Spring semester · Running 8.2.151 on our 8540s · Significant quantities of Wave 2 APs · ISE as RADIUS (only, no NAC, no onboarding) No changes to: · our guest WLAN (Clearpass/an Aruba controller pair) · onboarding (Cloudpath Wiz) · overall topology · open network in dorms for gadgets · non-use of AVC, it crapped out and never got solved after hundreds of hours with TAC Fears: · We haven’t yet hit the scale that will reveal problems with any of the newer stuff listed above Anyone else care to share? -Lee Lee Badman | Network Architect Certified Wireless Network Expert (#200) Information Technology Services 206 Machinery Hall 120 Smith Drive Syracuse, New York 13244 t 315.443.3003 f 315.443.4325 e lhbad...@syr.edu<mailto:lhbad...@syr.edu> w its.syr.edu<http://its.syr.edu> SYRACUSE UNIVERSITY syr.edu<http://syr.edu> ********** Participation and subscription information for this EDUCAUSE Constituent Group discussion list can be found at http://www.educause.edu/discuss. ********** Participation and subscription information for this EDUCAUSE Constituent Group discussion list can be found at http://www.educause.edu/discuss. ********** Participation and subscription information for this EDUCAUSE Constituent Group discussion list can be found at http://www.educause.edu/discuss. ********** Participation and subscription information for this EDUCAUSE Constituent Group discussion list can be found at http://www.educause.edu/discuss.
