Re: [WIRELESS-LAN] Cisco Wireless Interface Groups
I see a few different topics within this thread, each of which I've run across recently. re: ISC dhcp server - one lease per client: Perhaps a desirable idea - especially given the knob, but not recommended as doing so is outside the operation of the RFC. It's probably best as a last ditch effort only. I had been thinking of using it myself but now shying away from it. re: dirty interfaces. Working with TAC on this issue currently as I have non-grouped interfaces being marked as dirty in 7.0.240. I'm planning on making a feature request to a) make marking dirty optional b) have a configurable threshold, c) have a configurable timeout period and d) logging when the condition is cleared. In a non dot1x environment, I'm seeing unknown devices , of which there are rightly many, trying to grab an address for which no entry exists. When 3 requests go unanswered, the (solo) interface is marked as dirty, which I don't understand. Now although marked, it does not seem to then avoid using the interface for the (hardcoded) 30 minutes. Appreciate any insight or knowing if others are seeing the same behavior. re: 7.4.100.0 RRM - working on a similar issue. I found a 3502's 2.4 radio set on low Txpower (6) under 7.4.100. I moved it a 7.0.240 controller within the same RF group and TxPower (seeing the same neighbors), now running at 2. I need to move it back to see if the problem tracks with the codeRev. 7.4.100 is in it's default TPCv1 mode. On Mon, Feb 18, 2013 at 10:10 AM, Bryn Jones b.l.jo...@leeds.ac.uk wrote: Hi Vikki ** ** We have used interface groups for a while with great success on our WiSM2. We have a DHCP lease time of 20mins and we have an interface group that consist of 20 x /15 private IP subnets so that we have the IP capacity to cope. ** ** Thanks ** ** Bryn ** ** ** ** Bryn Jones ISS Network Development Rm 8.01e Computing Block EC Stoner Building University of Leeds UK LS2 9JT ** ** 0113 343 7055 ** ** ** ** *From:* The EDUCAUSE Wireless Issues Constituent Group Listserv [mailto: WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU] *On Behalf Of *Vikki Cutrone *Sent:* 15 February 2013 19:13 *To:* WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU *Subject:* [WIRELESS-LAN] Cisco Wireless Interface Groups ** ** Hello All, I recently configured multiple /24 subnets into a wireless interface group on my controllers, in an effort to cut down on multicast as well as increase the IP address space. It seems to be working but DHCP addresses are still being consumed at an alarming rate. Is anyone else using the interface group feature? and if so is it working as expected? Thank you in advance! -- Vikki Cutrone Network Administrator Vassar College, Box 13 124 Raymond Ave Poughkeepsie, NY 12604-0013 845-437-7231 ** 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/. -- Garry Peirce Network Architect Networkmaine, University of Maine System 1-207-561-3539 ** Participation and subscription information for this EDUCAUSE Constituent Group discussion list can be found at http://www.educause.edu/groups/.
Re: [WIRELESS-LAN] Cisco Wireless Interface Groups
Greetings Just fyi on the 7.4.100.0 RRM CSCue13108 TPC in 7.4 reduces transmit power to lower than expected values Workaround: Setup min - max power levels for TPC, so that the power levels do not fall below the expected value TAC does have a engineering special that fixes this or next release and agree outside the RFC but do use one lease per client and not had any problems,thought was to clean up pool and ddns little quicker. ISC dhcp mailing list conversations support just using shorter lease times, I just never took it out. best! jim On 2/20/2013 3:04 PM, Garret Peirce wrote: I see a few different topics within this thread, each of which I've run across recently. re: ISC dhcp server - one lease per client: Perhaps a desirable idea - especially given the knob, but not recommended as doing so is outside the operation of the RFC. It's probably best as a last ditch effort only. I had been thinking of using it myself but now shying away from it. re: dirty interfaces. Working with TAC on this issue currently as I have non-grouped interfaces being marked as dirty in 7.0.240. I'm planning on making a feature request to a) make marking dirty optional b) have a configurable threshold, c) have a configurable timeout period and d) logging when the condition is cleared. In a non dot1x environment, I'm seeing unknown devices , of which there are rightly many, trying to grab an address for which no entry exists. When 3 requests go unanswered, the (solo) interface is marked as dirty, which I don't understand. Now although marked, it does not seem to then avoid using the interface for the (hardcoded) 30 minutes. Appreciate any insight or knowing if others are seeing the same behavior. re: 7.4.100.0 RRM - working on a similar issue. I found a 3502's 2.4 radio set on low Txpower (6) under 7.4.100. I moved it a 7.0.240 controller within the same RF group and TxPower (seeing the same neighbors), now running at 2. I need to move it back to see if the problem tracks with the codeRev. 7.4.100 is in it's default TPCv1 mode. On Mon, Feb 18, 2013 at 10:10 AM, Bryn Jones b.l.jo...@leeds.ac.uk mailto:b.l.jo...@leeds.ac.uk wrote: Hi Vikki We have used interface groups for a while with great success on our WiSM2. We have a DHCP lease time of 20mins and we have an interface group that consist of 20 x /15 private IP subnets so that we have the IP capacity to cope. Thanks Bryn Bryn Jones ISS Network Development Rm 8.01e Computing Block EC Stoner Building University of Leeds UK LS2 9JT 0113 343 7055 *From:*The EDUCAUSE Wireless Issues Constituent Group Listserv [mailto:WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU mailto:WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU] *On Behalf Of *Vikki Cutrone *Sent:* 15 February 2013 19:13 *To:* WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU mailto:WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU *Subject:* [WIRELESS-LAN] Cisco Wireless Interface Groups Hello All, I recently configured multiple /24 subnets into a wireless interface group on my controllers, in an effort to cut down on multicast as well as increase the IP address space. It seems to be working but DHCP addresses are still being consumed at an alarming rate. Is anyone else using the interface group feature? and if so is it working as expected? Thank you in advance! -- Vikki Cutrone Network Administrator Vassar College, Box 13 124 Raymond Ave Poughkeepsie, NY 12604-0013 845-437-7231 tel:845-437-7231 ** 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/. -- Garry Peirce Network Architect Networkmaine, University of Maine System 1-207-561-3539 ** 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/.
Re: [WIRELESS-LAN] Cisco Wireless Interface Groups
We've been using interface groups for some time and like most people on here you'll notice that the same mac address will show up in dhcp table. We initially setup our dhcp (linux) for 8 hour leases and then quickly realized that we would exhaust the scopes. We tuned them down to 1 hour and seems to be good now. I talked with a Cisco wireless employee and he feels very comfortable using 20 minute lease times for most wlans. Also there is a command on the wlc that allows you to view which interfaces are dirty and won't allow dhcp requests for 30 minutes I believe. Craig Eyre Network Analyst IT Services Department Mount Royal University 4825 Mount Royal Gate SW Calgary AB T2P 3T5 P. 403.440.5199 E. ce...@mtroyal.ca The difference between a successful person and others is not a lack of strength, not a lack of knowledge, but rather in a lack of will. Vincent T. Lombardi From: Vikki Cutrone vicutr...@vassar.edu To: WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU, Date: 02/15/2013 12:13 PM Subject:[WIRELESS-LAN] Cisco Wireless Interface Groups Sent by:The EDUCAUSE Wireless Issues Constituent Group Listserv WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU Hello All, I recently configured multiple /24 subnets into a wireless interface group on my controllers, in an effort to cut down on multicast as well as increase the IP address space. It seems to be working but DHCP addresses are still being consumed at an alarming rate. Is anyone else using the interface group feature? and if so is it working as expected? Thank you in advance! -- Vikki Cutrone Network Administrator Vassar College, Box 13 124 Raymond Ave Poughkeepsie, NY 12604-0013 845-437-7231 ** Participation and subscription information for this EDUCAUSE Constituent Group discussion list can be found at http://www.educause.edu/groups/.__ This communication is intended for the use of the recipient to which it is addressed, and may contain confidential, personal, and or privileged information. Please contact the sender immediately if you are not the intended recipient of this communication, and do not copy, distribute, or take action relying on it. Any communication received in error, or subsequent reply, should be deleted or destroyed. ** Participation and subscription information for this EDUCAUSE Constituent Group discussion list can be found at http://www.educause.edu/groups/. inline: graycol.gif
RE: [WIRELESS-LAN] Cisco Wireless Interface Groups
Hi Vikki We have used interface groups for a while with great success on our WiSM2. We have a DHCP lease time of 20mins and we have an interface group that consist of 20 x /15 private IP subnets so that we have the IP capacity to cope. Thanks Bryn Bryn Jones ISS Network Development Rm 8.01e Computing Block EC Stoner Building University of Leeds UK LS2 9JT 0113 343 7055 From: The EDUCAUSE Wireless Issues Constituent Group Listserv [mailto:WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU] On Behalf Of Vikki Cutrone Sent: 15 February 2013 19:13 To: WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU Subject: [WIRELESS-LAN] Cisco Wireless Interface Groups Hello All, I recently configured multiple /24 subnets into a wireless interface group on my controllers, in an effort to cut down on multicast as well as increase the IP address space. It seems to be working but DHCP addresses are still being consumed at an alarming rate. Is anyone else using the interface group feature? and if so is it working as expected? Thank you in advance! -- Vikki Cutrone Network Administrator Vassar College, Box 13 124 Raymond Ave Poughkeepsie, NY 12604-0013 845-437-7231 ** 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/.
Cisco Wireless Interface Groups
Hello All, I recently configured multiple /24 subnets into a wireless interface group on my controllers, in an effort to cut down on multicast as well as increase the IP address space. It seems to be working but DHCP addresses are still being consumed at an alarming rate. Is anyone else using the interface group feature? and if so is it working as expected? Thank you in advance! -- Vikki Cutrone Network Administrator Vassar College, Box 13 124 Raymond Ave Poughkeepsie, NY 12604-0013 845-437-7231 ** Participation and subscription information for this EDUCAUSE Constituent Group discussion list can be found at http://www.educause.edu/groups/.
SV: [WIRELESS-LAN] Cisco Wireless Interface Groups
What version are you running on jour WLC? I know that there were hashing problems on older versions off 7.0 that resulted in that when a client reassociated it didnt come back to its former subnet. Try newer versions of 7.0 or 7.2 and Ill guess that it will work. It solved my problem. ;) Cheers Anders Nilsson Umeå university SUNET Sweden Från: The EDUCAUSE Wireless Issues Constituent Group Listserv [mailto:WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU] För Vikki Cutrone Skickat: den 15 februari 2013 20:13 Till: WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU Ämne: [WIRELESS-LAN] Cisco Wireless Interface Groups Hello All, I recently configured multiple /24 subnets into a wireless interface group on my controllers, in an effort to cut down on multicast as well as increase the IP address space. It seems to be working but DHCP addresses are still being consumed at an alarming rate. Is anyone else using the interface group feature? and if so is it working as expected? Thank you in advance! -- Vikki Cutrone Network Administrator Vassar College, Box 13 124 Raymond Ave Poughkeepsie, NY 12604-0013 845-437-7231 ** Participation and subscription information for this EDUCAUSE Constituent Group discussion list can be found at http://www.educause.edu/groups/ 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/.
Re: [WIRELESS-LAN] SV: [WIRELESS-LAN] Cisco Wireless Interface Groups
Version 7.2.111.3 That seems to be exactly what is currently happening. On Fri, Feb 15, 2013 at 2:23 PM, Anders Nilsson anders.nils...@adm.umu.sewrote: What version are you running on jour WLC? I know that there were hashing problems on older versions off 7.0 that resulted in that when a client reassociated it didn’t come back to its former subnet. Try newer versions of 7.0 or 7.2 and I’ll guess that it will work. ** ** It solved my problem. ;) ** ** ** ** Cheers Anders Nilsson Umeå university SUNET Sweden ** ** *Från:* The EDUCAUSE Wireless Issues Constituent Group Listserv [mailto: WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU] *För *Vikki Cutrone *Skickat:* den 15 februari 2013 20:13 *Till:* WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU *Ämne:* [WIRELESS-LAN] Cisco Wireless Interface Groups ** ** Hello All, I recently configured multiple /24 subnets into a wireless interface group on my controllers, in an effort to cut down on multicast as well as increase the IP address space. It seems to be working but DHCP addresses are still being consumed at an alarming rate. Is anyone else using the interface group feature? and if so is it working as expected? Thank you in advance! -- Vikki Cutrone Network Administrator Vassar College, Box 13 124 Raymond Ave Poughkeepsie, NY 12604-0013 845-437-7231 ** 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/. -- Vikki Cutrone Network Administrator Vassar College, Box 13 124 Raymond Ave Poughkeepsie, NY 12604-0013 845-437-7231 ** Participation and subscription information for this EDUCAUSE Constituent Group discussion list can be found at http://www.educause.edu/groups/.
Re: Cisco Wireless Interface Groups
On 2/15/2013 2:13 PM, Vikki Cutrone wrote: Is anyone else using the interface group feature? Yes. and if so is it working as expected? Yes. Great feature, happy it finally happened! -Rick -- Rick Coloccia, Jr. Network Manager State University of NY College at Geneseo 1 College Circle, 119 South Hall Geneseo, NY 14454 V: 585-245-5577 F: 585-245-5579 ** Participation and subscription information for this EDUCAUSE Constituent Group discussion list can be found at http://www.educause.edu/groups/.
Re: [WIRELESS-LAN] SV: [WIRELESS-LAN] Cisco Wireless Interface Groups
VLAN select feature is working good here on: 7.2.110.8, 7.4.100.0, 7.4.103.3 and now on 7.3.112.0. ;-) just fyi, tried 7.4.100.0 and small issue with RRM, (running at low signal strength) and with the 1142 model access points. Patch for the RRM and all was great, seeing more 5GHz N clients with 7.4.103.3 code than on 7.2.x and 7.3.x. The 1142 random rebooting continued though, patch on its way. Went to 7.3.112.0 and all is good since, running on 5508 controllers and AP1242, AP1252, AP1142, AP3502 access points. jim On 2/15/2013 2:27 PM, Hurt,Trenton W. wrote: http://www.cisco.com/en/US/products/ps10315/products_tech_note09186a0080bb4900.shtml In WLC release 7.2, the VLAN Select feature (which is supported only on the newer WLCs like 5508, WiSM-2, 7500, and 2500) was modified and now supports VLAN Select with a new modified algorithm. In the previous implementation, using the round robin algorithm was causing clients to obtain new IP addresses on every re-association, thus depleting IP addresses fast from the available DHCP pools. *From:*The EDUCAUSE Wireless Issues Constituent Group Listserv [mailto:WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU] *On Behalf Of *Anders Nilsson *Sent:* Friday, February 15, 2013 2:23 PM *To:* WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU *Subject:* [WIRELESS-LAN] SV: [WIRELESS-LAN] Cisco Wireless Interface Groups What version are you running on jour WLC? I know that there were hashing problems on older versions off 7.0 that resulted in that when a client reassociated it didn't come back to its former subnet. Try newer versions of 7.0 or 7.2 and I'll guess that it will work. It solved my problem. ;) Cheers Anders Nilsson Umeå university SUNET Sweden *Från:*The EDUCAUSE Wireless Issues Constituent Group Listserv [mailto:WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU] *För *Vikki Cutrone *Skickat:* den 15 februari 2013 20:13 *Till:* WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU mailto:WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU *Ämne:* [WIRELESS-LAN] Cisco Wireless Interface Groups Hello All, I recently configured multiple /24 subnets into a wireless interface group on my controllers, in an effort to cut down on multicast as well as increase the IP address space. It seems to be working but DHCP addresses are still being consumed at an alarming rate. Is anyone else using the interface group feature? and if so is it working as expected? Thank you in advance! -- Vikki Cutrone Network Administrator Vassar College, Box 13 124 Raymond Ave Poughkeepsie, NY 12604-0013 845-437-7231 ** 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/.
Re: [WIRELESS-LAN] SV: [WIRELESS-LAN] Cisco Wireless Interface Groups
As Anders hinted, the mac hashing feature to solve dhcp exhaustion introduced in 7.2 was backported to later versions of 7.0 code (7.0.220.0 perhaps). We're running vlan select happily on 5508s on 7.2 and WiSM-1s on 7.0 and it works well on both. On Fri, Feb 15, 2013 at 11:27 AM, Hurt,Trenton W. trent.h...@louisville.edu wrote: http://www.cisco.com/en/US/products/ps10315/products_tech_note09186a0080bb4900.shtml ** ** ** ** “In WLC release 7.2, the VLAN Select feature (which is supported only on the newer WLCs like 5508, WiSM-2, 7500, and 2500) was modified and now supports VLAN Select with a new modified algorithm. In the previous implementation, using the round robin algorithm was causing clients to obtain new IP addresses on every re-association, thus depleting IP addresses fast from the available DHCP pools.” ** ** ** ** *From:* The EDUCAUSE Wireless Issues Constituent Group Listserv [mailto: WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU] *On Behalf Of *Anders Nilsson *Sent:* Friday, February 15, 2013 2:23 PM *To:* WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU *Subject:* [WIRELESS-LAN] SV: [WIRELESS-LAN] Cisco Wireless Interface Groups ** ** What version are you running on jour WLC? I know that there were hashing problems on older versions off 7.0 that resulted in that when a client reassociated it didn’t come back to its former subnet. Try newer versions of 7.0 or 7.2 and I’ll guess that it will work. ** ** It solved my problem. ;) ** ** ** ** Cheers Anders Nilsson Umeå university SUNET Sweden ** ** *Från:* The EDUCAUSE Wireless Issues Constituent Group Listserv [ mailto:WIRELESS-LAN@LISTSERV.EDUCAUSE.EDUWIRELESS-LAN@LISTSERV.EDUCAUSE.EDU] *För *Vikki Cutrone *Skickat:* den 15 februari 2013 20:13 *Till:* WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU *Ämne:* [WIRELESS-LAN] Cisco Wireless Interface Groups ** ** Hello All, I recently configured multiple /24 subnets into a wireless interface group on my controllers, in an effort to cut down on multicast as well as increase the IP address space. It seems to be working but DHCP addresses are still being consumed at an alarming rate. Is anyone else using the interface group feature? and if so is it working as expected? Thank you in advance! -- Vikki Cutrone Network Administrator Vassar College, Box 13 124 Raymond Ave Poughkeepsie, NY 12604-0013 845-437-7231 ** 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/.
Re: [WIRELESS-LAN] Cisco Wireless Interface Groups
I've never tried it but ISC dhcp server at some point added a one lease per client feature where the server terminates existing leases associated with a given MAC when it assigns a new address. Infoblox in its most recent release supports this but I've not tried it. Theoretically at least if you were using ISC or Infoblox this feature would make it so that you wouldn't get dhcp exhaustion with vlan select and without the hashing feature of later WLC releases. On Fri, Feb 15, 2013 at 11:13 AM, Vikki Cutrone vicutr...@vassar.eduwrote: Hello All, I recently configured multiple /24 subnets into a wireless interface group on my controllers, in an effort to cut down on multicast as well as increase the IP address space. It seems to be working but DHCP addresses are still being consumed at an alarming rate. Is anyone else using the interface group feature? and if so is it working as expected? Thank you in advance! -- Vikki Cutrone Network Administrator Vassar College, Box 13 124 Raymond Ave Poughkeepsie, NY 12604-0013 845-437-7231 ** 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/.
