[c-nsp] Strange T3 failure on 7206
We got an alarm that a T3 to a customer was down. PE router showed interface up, line protocol down. CE router showed down/down. Provider side goes to an Adtran Opti-mux out OC-12 to Verizon, customer end is a Verizon mux on premise. Called Vz and they claimed it was CPE, they saw idle loop towards our 7206 CE router. We shut/no-shut the interface and rebooted the 7206, no joy. I'm not familiar with the term idle loop, we were showing receive LOS and sending RAI. Customer IT guy came on site and saw CLOS on Verizon mux, alarm light on 7206. He disconnected the cable and put a coax loop towards the 7206. Interface came up-looped right away. Reconnected to Verizon mux and everything came back up nice and happy. That's what is bugging me. Circuit has been running fine for months. -- -- Jay Hennigan - CCIE #7880 - Network Engineering - j...@impulse.net Impulse Internet Service - http://www.impulse.net/ Your local telephone and internet company - 805 884-6323 - WB6RDV ___ cisco-nsp mailing list cisco-nsp@puck.nether.net https://puck.nether.net/mailman/listinfo/cisco-nsp archive at http://puck.nether.net/pipermail/cisco-nsp/
Re: [c-nsp] Strange T3 failure on 7206
On 1/18/2011 09:52, Jay Hennigan wrote: We got an alarm that a T3 to a customer was down. PE router showed interface up, line protocol down. CE router showed down/down. Provider side goes to an Adtran Opti-mux out OC-12 to Verizon, customer end is a Verizon mux on premise. Called Vz and they claimed it was CPE, they saw idle loop towards our 7206 CE router. We shut/no-shut the interface and rebooted the 7206, no joy. I'm not familiar with the term idle loop, we were showing receive LOS and sending RAI. Customer IT guy came on site and saw CLOS on Verizon mux, alarm light on 7206. He disconnected the cable and put a coax loop towards the 7206. Interface came up-looped right away. Reconnected to Verizon mux and everything came back up nice and happy. That's what is bugging me. Circuit has been running fine for months. I had a T3 card get randomly confused a few months ago and wouldn't responding to commands properly. Ended up doing an OIR on it to reset it and called the whole thing weirdness happens. Mine was off a Verizon OC-12 to Adtran OPTI-6100 mux (with OC-3, DS3, and DS1 cards). ~Seth ___ cisco-nsp mailing list cisco-nsp@puck.nether.net https://puck.nether.net/mailman/listinfo/cisco-nsp archive at http://puck.nether.net/pipermail/cisco-nsp/
Re: [c-nsp] Strange T3 failure on 7206
Hi, On Tue, Jan 18, 2011 at 09:52:16AM -0800, Jay Hennigan wrote: Reconnected to Verizon mux and everything came back up nice and happy. That's what is bugging me. Circuit has been running fine for months. We've seen that on E3s and T3s as well - seems sometimes the stuff just de-syncs, and physically unplugging the cables helps getting it to re-sync. Highly annoying. (Especially if Telco techs show up, look at your cabling, and claim these cables are no good quality!, and go on to demonstrate their wisdom by unplugging/replugging the bad cable - and voila! the link is back, confirming their wisdom...) And no, I have not found a proper technical explanation yet - but it doesn't bother us very much as it happens quite infrequently, and we're using less and less E3/T3 lines. 100M Ethernet links can be had for roughly the same price, the gear is MCH cheaper, and the weird effects are gone as well... (Now, STM-1/OC-3 and up are a different thing - proper data links, proper syncing and fault monitoring, etc. - but still the gear is way expensive...) gert -- USENET is *not* the non-clickable part of WWW! //www.muc.de/~gert/ Gert Doering - Munich, Germany g...@greenie.muc.de fax: +49-89-35655025g...@net.informatik.tu-muenchen.de pgpswoDoprzRu.pgp Description: PGP signature ___ cisco-nsp mailing list cisco-nsp@puck.nether.net https://puck.nether.net/mailman/listinfo/cisco-nsp archive at http://puck.nether.net/pipermail/cisco-nsp/
Re: [c-nsp] Strange T3 failure on 7206
Any attenuators involved?? I've actually experienced the same thing before and traced it back to what we believed to be a bad attenuator. Replaced it and LOS cleared right up. I only mention it because the Adtran MUX that was in use at that facility didn't have a way to dial down the DB's. On Tue, Jan 18, 2011 at 11:52 AM, Jay Hennigan j...@west.net wrote: We got an alarm that a T3 to a customer was down. PE router showed interface up, line protocol down. CE router showed down/down. Provider side goes to an Adtran Opti-mux out OC-12 to Verizon, customer end is a Verizon mux on premise. Called Vz and they claimed it was CPE, they saw idle loop towards our 7206 CE router. We shut/no-shut the interface and rebooted the 7206, no joy. I'm not familiar with the term idle loop, we were showing receive LOS and sending RAI. Customer IT guy came on site and saw CLOS on Verizon mux, alarm light on 7206. He disconnected the cable and put a coax loop towards the 7206. Interface came up-looped right away. Reconnected to Verizon mux and everything came back up nice and happy. That's what is bugging me. Circuit has been running fine for months. -- -- Jay Hennigan - CCIE #7880 - Network Engineering - j...@impulse.net Impulse Internet Service - http://www.impulse.net/ Your local telephone and internet company - 805 884-6323 - WB6RDV ___ cisco-nsp mailing list cisco-nsp@puck.nether.net https://puck.nether.net/mailman/listinfo/cisco-nsp archive at http://puck.nether.net/pipermail/cisco-nsp/ ___ cisco-nsp mailing list cisco-nsp@puck.nether.net https://puck.nether.net/mailman/listinfo/cisco-nsp archive at http://puck.nether.net/pipermail/cisco-nsp/
Re: [c-nsp] Strange T3 failure on 7206
Jay-- I have had similar experience with some T3s from Vz. I like to unplug and replug as you and Gert noted. Plus I like to keep some spare coax and adapters hanging around my routers. When I invariably receive the it's the CPE I loop the cables and ask them if they see a loop. That shuts them up fast. ;-) - Jay writes: Date: Tue, 18 Jan 2011 09:52:16 -0800 From: Jay Hennigan j...@west.net To: Cisco Mailing list cisco-nsp@puck.nether.net Subject: [c-nsp] Strange T3 failure on 7206 Message-ID: 4d35d350.4000...@west.net Content-Type: text/plain; charset=ISO-8859-1 We got an alarm that a T3 to a customer was down. PE router showed interface up, line protocol down. CE router showed down/down. Provider side goes to an Adtran Opti-mux out OC-12 to Verizon, customer end is a Verizon mux on premise. Called Vz and they claimed it was CPE, they saw idle loop towards our 7206 CE router. We shut/no-shut the interface and rebooted the 7206, no joy. I'm not familiar with the term idle loop, we were showing receive LOS and sending RAI. Customer IT guy came on site and saw CLOS on Verizon mux, alarm light on 7206. He disconnected the cable and put a coax loop towards the 7206. Interface came up-looped right away. Reconnected to Verizon mux and everything came back up nice and happy. That's what is bugging me. Circuit has been running fine for months. -- -- Jay Hennigan - CCIE #7880 - Network Engineering - j...@impulse.net Impulse Internet Service - http://www.impulse.net/ Your local telephone and internet company - 805 884-6323 - WB6RDV cjw ___ cisco-nsp mailing list cisco-nsp@puck.nether.net https://puck.nether.net/mailman/listinfo/cisco-nsp archive at http://puck.nether.net/pipermail/cisco-nsp/
