RE: [WIRELESS-LAN] WiSM Interface Problem/Question
Just curious, what Software Version are you running on your wisms? Also, make sure you are prunning unwanted vlans in the gig and port-channel interfaces. -Hector -Original Message- From: Lee H Badman [mailto:[EMAIL PROTECTED] Sent: Thursday, September 20, 2007 2:40 PM To: WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU Subject: Re: [WIRELESS-LAN] WiSM Interface Problem/Question I'm told that the dynamic interfaces, despite having IP addresses, aren't reliably pingable. They can drop off from ping (as I'm seeing) and to test whether it's really down, you have to ping an attached client (I'm not making this up). I'm also told that starting with 4.1.185.0, these interfaces can be considered trustworthy for ping-monitoring. Lee H. Badman Wireless/Network Engineer Information Technology and Services Syracuse University 315 443-3003 -Original Message- From: John Watters [mailto:[EMAIL PROTECTED] Sent: Thursday, September 20, 2007 3:13 PM To: WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU Subject: Re: [WIRELESS-LAN] WiSM Interface Problem/Question I have seen this problem a couple of times, but it has disappeared before I could finish troubleshooting it. Please let me know what you find. -jcw To: WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU From: Lee H Badman [EMAIL PROTECTED] Date: Thu, 20 Sep 2007 12:39:30 -0400 Subject: [WIRELESS-LAN] WiSM Interface Problem/Question Reply-To: The EDUCAUSE Wireless Issues Constituent Group Listserv WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU Though I have not completely ruled out our network... I am seeing individual VLAN interfaces (these each get IP addresses) on WiSMs that occasionally fall off - just stop responding. The net effect is that a given SSID is still present for clients to attach to, but the interface is gone, so there is no network usability. If I delete and recreate the interface, functionality is instantly restored. (or if the controller is rebooted). This is happening across three different 6500's, several different WiSMs Have ruled out duplicate IP addresses, and some ARP history is showing two MAC addresses (same root MAC, last digit varies as is seen when MACs are dynamically generated) for the same dynamic interface IP address, and in some cases the same MAC is showing up for the AP manager interface and the dynamic vlan interface. Not implying that all of this can't be explained, or that there is an issue with the WiSMs- but wondering if anyone else has seen any similar symptoms and found answers. Feel free to respond directly to me if you prefer. Regards- Lee H. Badman Wireless/Network Engineer Information Technology and Services Syracuse University 315 443-3003 ** Participation and subscription information for this EDUCAUSE Constituent Group discussion list can be found at http://www.educause.edu/groups/. John Watters UA: Office of Information Technology 205-348-3992 ** 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] WiSM Interface Problem/Question
4.0207.0, and no extra VLANs. Again, Cisco is saying that is normal:( for this version. Lee H. Badman Wireless/Network Engineer Information Technology and Services Syracuse University 315 443-3003 -Original Message- From: Hector J Rios [mailto:[EMAIL PROTECTED] Sent: Friday, September 21, 2007 1:49 PM To: WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU Subject: Re: [WIRELESS-LAN] WiSM Interface Problem/Question Just curious, what Software Version are you running on your wisms? Also, make sure you are prunning unwanted vlans in the gig and port-channel interfaces. -Hector -Original Message- From: Lee H Badman [mailto:[EMAIL PROTECTED] Sent: Thursday, September 20, 2007 2:40 PM To: WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU Subject: Re: [WIRELESS-LAN] WiSM Interface Problem/Question I'm told that the dynamic interfaces, despite having IP addresses, aren't reliably pingable. They can drop off from ping (as I'm seeing) and to test whether it's really down, you have to ping an attached client (I'm not making this up). I'm also told that starting with 4.1.185.0, these interfaces can be considered trustworthy for ping-monitoring. Lee H. Badman Wireless/Network Engineer Information Technology and Services Syracuse University 315 443-3003 -Original Message- From: John Watters [mailto:[EMAIL PROTECTED] Sent: Thursday, September 20, 2007 3:13 PM To: WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU Subject: Re: [WIRELESS-LAN] WiSM Interface Problem/Question I have seen this problem a couple of times, but it has disappeared before I could finish troubleshooting it. Please let me know what you find. -jcw To: WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU From: Lee H Badman [EMAIL PROTECTED] Date: Thu, 20 Sep 2007 12:39:30 -0400 Subject: [WIRELESS-LAN] WiSM Interface Problem/Question Reply-To: The EDUCAUSE Wireless Issues Constituent Group Listserv WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU Though I have not completely ruled out our network... I am seeing individual VLAN interfaces (these each get IP addresses) on WiSMs that occasionally fall off - just stop responding. The net effect is that a given SSID is still present for clients to attach to, but the interface is gone, so there is no network usability. If I delete and recreate the interface, functionality is instantly restored. (or if the controller is rebooted). This is happening across three different 6500's, several different WiSMs Have ruled out duplicate IP addresses, and some ARP history is showing two MAC addresses (same root MAC, last digit varies as is seen when MACs are dynamically generated) for the same dynamic interface IP address, and in some cases the same MAC is showing up for the AP manager interface and the dynamic vlan interface. Not implying that all of this can't be explained, or that there is an issue with the WiSMs- but wondering if anyone else has seen any similar symptoms and found answers. Feel free to respond directly to me if you prefer. Regards- Lee H. Badman Wireless/Network Engineer Information Technology and Services Syracuse University 315 443-3003 ** Participation and subscription information for this EDUCAUSE Constituent Group discussion list can be found at http://www.educause.edu/groups/. John Watters UA: Office of Information Technology 205-348-3992 ** 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] WiSM Interface Problem/Question
Just f.y.i. This is somewhat unrelated, but beware upgrading your SUP's to 12.2(33)SXH. There is a bug when running QoS on the Sup with a WiSM in the box. Only 1 out of the 4 virtual interfaces going to each controller on the WiSM will function. We found this out the hard way, it is not in the IOS release notes. Cisco has confirmed the bug (CSCsk43058, under review), and the workaround is to disable QoS and then re-enable. A fix will be included in SXH1 which is not out yet. --Joe -Original Message- From: Lee H Badman [mailto:[EMAIL PROTECTED] Sent: Friday, September 21, 2007 3:20 PM To: WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU Subject: Re: [WIRELESS-LAN] WiSM Interface Problem/Question 4.0207.0, and no extra VLANs. Again, Cisco is saying that is normal:( for this version. Lee H. Badman Wireless/Network Engineer Information Technology and Services Syracuse University 315 443-3003 -Original Message- From: Hector J Rios [mailto:[EMAIL PROTECTED] Sent: Friday, September 21, 2007 1:49 PM To: WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU Subject: Re: [WIRELESS-LAN] WiSM Interface Problem/Question Just curious, what Software Version are you running on your wisms? Also, make sure you are prunning unwanted vlans in the gig and port-channel interfaces. -Hector -Original Message- From: Lee H Badman [mailto:[EMAIL PROTECTED] Sent: Thursday, September 20, 2007 2:40 PM To: WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU Subject: Re: [WIRELESS-LAN] WiSM Interface Problem/Question I'm told that the dynamic interfaces, despite having IP addresses, aren't reliably pingable. They can drop off from ping (as I'm seeing) and to test whether it's really down, you have to ping an attached client (I'm not making this up). I'm also told that starting with 4.1.185.0, these interfaces can be considered trustworthy for ping-monitoring. Lee H. Badman Wireless/Network Engineer Information Technology and Services Syracuse University 315 443-3003 -Original Message- From: John Watters [mailto:[EMAIL PROTECTED] Sent: Thursday, September 20, 2007 3:13 PM To: WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU Subject: Re: [WIRELESS-LAN] WiSM Interface Problem/Question I have seen this problem a couple of times, but it has disappeared before I could finish troubleshooting it. Please let me know what you find. -jcw To: WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU From: Lee H Badman [EMAIL PROTECTED] Date: Thu, 20 Sep 2007 12:39:30 -0400 Subject: [WIRELESS-LAN] WiSM Interface Problem/Question Reply-To: The EDUCAUSE Wireless Issues Constituent Group Listserv WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU Though I have not completely ruled out our network... I am seeing individual VLAN interfaces (these each get IP addresses) on WiSMs that occasionally fall off - just stop responding. The net effect is that a given SSID is still present for clients to attach to, but the interface is gone, so there is no network usability. If I delete and recreate the interface, functionality is instantly restored. (or if the controller is rebooted). This is happening across three different 6500's, several different WiSMs Have ruled out duplicate IP addresses, and some ARP history is showing two MAC addresses (same root MAC, last digit varies as is seen when MACs are dynamically generated) for the same dynamic interface IP address, and in some cases the same MAC is showing up for the AP manager interface and the dynamic vlan interface. Not implying that all of this can't be explained, or that there is an issue with the WiSMs- but wondering if anyone else has seen any similar symptoms and found answers. Feel free to respond directly to me if you prefer. Regards- Lee H. Badman Wireless/Network Engineer Information Technology and Services Syracuse University 315 443-3003 ** Participation and subscription information for this EDUCAUSE Constituent Group discussion list can be found at http://www.educause.edu/groups/. John Watters UA: Office of Information Technology 205-348-3992 ** 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/.
RE: [WIRELESS-LAN] WiSM Interface Problem/Question
Great info, thanks Joe. Too much of this doesn't make it the release notes and you have to rely on tracking bugs... Lee H. Badman Wireless/Network Engineer Information Technology and Services Syracuse University 315 443-3003 -Original Message- From: Roth, Joe [mailto:[EMAIL PROTECTED] Sent: Friday, September 21, 2007 3:59 PM To: WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU Subject: Re: [WIRELESS-LAN] WiSM Interface Problem/Question Just f.y.i. This is somewhat unrelated, but beware upgrading your SUP's to 12.2(33)SXH. There is a bug when running QoS on the Sup with a WiSM in the box. Only 1 out of the 4 virtual interfaces going to each controller on the WiSM will function. We found this out the hard way, it is not in the IOS release notes. Cisco has confirmed the bug (CSCsk43058, under review), and the workaround is to disable QoS and then re-enable. A fix will be included in SXH1 which is not out yet. --Joe -Original Message- From: Lee H Badman [mailto:[EMAIL PROTECTED] Sent: Friday, September 21, 2007 3:20 PM To: WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU Subject: Re: [WIRELESS-LAN] WiSM Interface Problem/Question 4.0207.0, and no extra VLANs. Again, Cisco is saying that is normal:( for this version. Lee H. Badman Wireless/Network Engineer Information Technology and Services Syracuse University 315 443-3003 -Original Message- From: Hector J Rios [mailto:[EMAIL PROTECTED] Sent: Friday, September 21, 2007 1:49 PM To: WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU Subject: Re: [WIRELESS-LAN] WiSM Interface Problem/Question Just curious, what Software Version are you running on your wisms? Also, make sure you are prunning unwanted vlans in the gig and port-channel interfaces. -Hector -Original Message- From: Lee H Badman [mailto:[EMAIL PROTECTED] Sent: Thursday, September 20, 2007 2:40 PM To: WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU Subject: Re: [WIRELESS-LAN] WiSM Interface Problem/Question I'm told that the dynamic interfaces, despite having IP addresses, aren't reliably pingable. They can drop off from ping (as I'm seeing) and to test whether it's really down, you have to ping an attached client (I'm not making this up). I'm also told that starting with 4.1.185.0, these interfaces can be considered trustworthy for ping-monitoring. Lee H. Badman Wireless/Network Engineer Information Technology and Services Syracuse University 315 443-3003 -Original Message- From: John Watters [mailto:[EMAIL PROTECTED] Sent: Thursday, September 20, 2007 3:13 PM To: WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU Subject: Re: [WIRELESS-LAN] WiSM Interface Problem/Question I have seen this problem a couple of times, but it has disappeared before I could finish troubleshooting it. Please let me know what you find. -jcw To: WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU From: Lee H Badman [EMAIL PROTECTED] Date: Thu, 20 Sep 2007 12:39:30 -0400 Subject: [WIRELESS-LAN] WiSM Interface Problem/Question Reply-To: The EDUCAUSE Wireless Issues Constituent Group Listserv WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU Though I have not completely ruled out our network... I am seeing individual VLAN interfaces (these each get IP addresses) on WiSMs that occasionally fall off - just stop responding. The net effect is that a given SSID is still present for clients to attach to, but the interface is gone, so there is no network usability. If I delete and recreate the interface, functionality is instantly restored. (or if the controller is rebooted). This is happening across three different 6500's, several different WiSMs Have ruled out duplicate IP addresses, and some ARP history is showing two MAC addresses (same root MAC, last digit varies as is seen when MACs are dynamically generated) for the same dynamic interface IP address, and in some cases the same MAC is showing up for the AP manager interface and the dynamic vlan interface. Not implying that all of this can't be explained, or that there is an issue with the WiSMs- but wondering if anyone else has seen any similar symptoms and found answers. Feel free to respond directly to me if you prefer. Regards- Lee H. Badman Wireless/Network Engineer Information Technology and Services Syracuse University 315 443-3003 ** Participation and subscription information for this EDUCAUSE Constituent Group discussion list can be found at http://www.educause.edu/groups/. John Watters UA: Office of Information Technology 205-348-3992 ** 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
Re: [WIRELESS-LAN] WiSM Interface Problem/Question
I have seen this problem a couple of times, but it has disappeared before I could finish troubleshooting it. Please let me know what you find. -jcw To: WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU From: Lee H Badman [EMAIL PROTECTED] Date: Thu, 20 Sep 2007 12:39:30 -0400 Subject: [WIRELESS-LAN] WiSM Interface Problem/Question Reply-To: The EDUCAUSE Wireless Issues Constituent Group Listserv WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU Though I have not completely ruled out our network... I am seeing individual VLAN interfaces (these each get IP addresses) on WiSMs that occasionally fall off - just stop responding. The net effect is that a given SSID is still present for clients to attach to, but the interface is gone, so there is no network usability. If I delete and recreate the interface, functionality is instantly restored. (or if the controller is rebooted). This is happening across three different 6500's, several different WiSMs Have ruled out duplicate IP addresses, and some ARP history is showing two MAC addresses (same root MAC, last digit varies as is seen when MACs are dynamically generated) for the same dynamic interface IP address, and in some cases the same MAC is showing up for the AP manager interface and the dynamic vlan interface. Not implying that all of this can't be explained, or that there is an issue with the WiSMs- but wondering if anyone else has seen any similar symptoms and found answers. Feel free to respond directly to me if you prefer. Regards- Lee H. Badman Wireless/Network Engineer Information Technology and Services Syracuse University 315 443-3003 ** Participation and subscription information for this EDUCAUSE Constituent Group discussion list can be found at http://www.educause.edu/groups/. John Watters UA: Office of Information Technology 205-348-3992 ** Participation and subscription information for this EDUCAUSE Constituent Group discussion list can be found at http://www.educause.edu/groups/.
RE: [WIRELESS-LAN] WiSM Interface Problem/Question
I'm told that the dynamic interfaces, despite having IP addresses, aren't reliably pingable. They can drop off from ping (as I'm seeing) and to test whether it's really down, you have to ping an attached client (I'm not making this up). I'm also told that starting with 4.1.185.0, these interfaces can be considered trustworthy for ping-monitoring. Lee H. Badman Wireless/Network Engineer Information Technology and Services Syracuse University 315 443-3003 -Original Message- From: John Watters [mailto:[EMAIL PROTECTED] Sent: Thursday, September 20, 2007 3:13 PM To: WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU Subject: Re: [WIRELESS-LAN] WiSM Interface Problem/Question I have seen this problem a couple of times, but it has disappeared before I could finish troubleshooting it. Please let me know what you find. -jcw To: WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU From: Lee H Badman [EMAIL PROTECTED] Date: Thu, 20 Sep 2007 12:39:30 -0400 Subject: [WIRELESS-LAN] WiSM Interface Problem/Question Reply-To: The EDUCAUSE Wireless Issues Constituent Group Listserv WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU Though I have not completely ruled out our network... I am seeing individual VLAN interfaces (these each get IP addresses) on WiSMs that occasionally fall off - just stop responding. The net effect is that a given SSID is still present for clients to attach to, but the interface is gone, so there is no network usability. If I delete and recreate the interface, functionality is instantly restored. (or if the controller is rebooted). This is happening across three different 6500's, several different WiSMs Have ruled out duplicate IP addresses, and some ARP history is showing two MAC addresses (same root MAC, last digit varies as is seen when MACs are dynamically generated) for the same dynamic interface IP address, and in some cases the same MAC is showing up for the AP manager interface and the dynamic vlan interface. Not implying that all of this can't be explained, or that there is an issue with the WiSMs- but wondering if anyone else has seen any similar symptoms and found answers. Feel free to respond directly to me if you prefer. Regards- Lee H. Badman Wireless/Network Engineer Information Technology and Services Syracuse University 315 443-3003 ** Participation and subscription information for this EDUCAUSE Constituent Group discussion list can be found at http://www.educause.edu/groups/. John Watters UA: Office of Information Technology 205-348-3992 ** 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/.
