Re: [c-nsp] RX No Buff Errors on 7206 w/NPE-G1
So in the case of my border router it's likely that we simply got hit with a flood of packets (small scale attack perhaps?) and the G1 just couldn't handle it. This seems likely since I saw the overruns on both the GigE int to the upstream provider and both GigE ints back to the core of our network. This leads me into a slightly different topic then. My apologies to Vincent for hijacking his thread. I'm looking at placing a 7600 in our facility closest to our 2 main upstreams, both of which enter our facility on our own fiber. This facility is a new data center and we expect a large number of PtPs so we gave both providers the opportunity to sit in our DC. I don't have a stellar optical system to transport Internet connections from either provider back to our main POP. It would be Ethernet over Sonet (OC12s currently) and limited to FastE only without major upgrades around the ring, which would be inefficient and expensive to upgrade. I was planning on setting a 7609-S at that location as part of our distribution layer and dual-home it back to the primary POP, ideally over 10G. This router would give me the ability to touch both upstreams with a GigE interface. I was planning on either bringing the 2 connections down on VLANs to the core and popping them off on access interfaces back to our existing border routers or by doing something with VRFs and MPLS. The other option is terminating both of these upstream L3 connections on that new 7609. However I'm leary about doing that for redundancy reasons, even with dual RSPs. We've had to fully power cycle our 7613s on a number of occasions over the past year for an assorted of reasons. The other option is to buy 2 7606-S chassis with or without dual RSPs to touch each provider. I like this option better but that's more $$$. So, I guess my question should be at what point do I replace our existing border routers (7206VXR w/ G1 and a 3845 (replaced by an identical 7206 as soon as I can free it up)) with 7600s? Our combined bandwidth across all 3 providers is 80Mbps currently but we'll be bumping this up to 150Mbps soon and we just signed on a customer wanting a dedicated 20M. Considering that we only had 16M 1.5 years ago, that we're just now bringing a data center online, and that we're rolling out ADSL2+ and FFTx I'd say we'll be at 500-750M in another 1.5 year's time, more if we resell to our neighboring rural providers. Am I right in thinking that touching what will soon be our only 2 providers with a single router be risky, even if it is fully redundant? Thanks Justin Rodney Dunn wrote: Almost every time I've ever been part of a troubleshooting session for Gige overruns and ignores it's microburst on the segment and the receiving router can't process the frames quick enough. It's so hard to debug because without an analyzer on the wire you can't prove it's a micro burst. The 65xx/76xx can move those frames are wire rate. For small packets the G1 can't. Rodney On Thu, Nov 01, 2007 at 02:41:14PM -0500, Justin Shore wrote: Vincent, I saw a similar problem a couple weeks ago with identical hardware acting as a border router running 12.4(11)T1. I had overruns on Gi0/1 and 2 which connect back to our core 7600s and Gi0/3 which is a 30meg link to one of our upstream providers. Neither interface on either 7600 had any errors. I'm at a loss to explain either of our issues. Justin Vincent Aniello wrote: On a 7206VXR with a NPE-G1 processor I am seeing input errors on a Gigabit Ethernet interface. The input errors are due to ignored packets: ___ 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] RX No Buff Errors on 7206 w/NPE-G1
Would a NPE-G2 processor be able to handle the microbursts or it a limitation of the 7200 platform? --Vincent -Original Message- From: Rodney Dunn [mailto:[EMAIL PROTECTED] Sent: Thursday, November 01, 2007 10:52 PM To: Justin Shore Cc: Vincent Aniello; cisco-nsp@puck.nether.net Subject: Re: [c-nsp] RX No Buff Errors on 7206 w/NPE-G1 Almost every time I've ever been part of a troubleshooting session for Gige overruns and ignores it's microburst on the segment and the receiving router can't process the frames quick enough. It's so hard to debug because without an analyzer on the wire you can't prove it's a micro burst. The 65xx/76xx can move those frames are wire rate. For small packets the G1 can't. Rodney On Thu, Nov 01, 2007 at 02:41:14PM -0500, Justin Shore wrote: Vincent, I saw a similar problem a couple weeks ago with identical hardware acting as a border router running 12.4(11)T1. I had overruns on Gi0/1 and 2 which connect back to our core 7600s and Gi0/3 which is a 30meg link to one of our upstream providers. Neither interface on either 7600 had any errors. I'm at a loss to explain either of our issues. Justin Vincent Aniello wrote: On a 7206VXR with a NPE-G1 processor I am seeing input errors on a Gigabit Ethernet interface. The input errors are due to ignored packets: ___ 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/ Disclaimer: Any references to Pipeline performance contained herein are based on historic performance levels which Pipeline expects to maintain or exceed but nevertheless does not guarantee. Congested networks, price volatility, or other extraordinary events may impede future trading activities and degrade performance statistics. ___ 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] RX No Buff Errors on 7206 w/NPE-G1
It would be able to handle a higher burst. I've not tested it to see if it can handle a linerate microburst on a GE port though. On Fri, Nov 02, 2007 at 09:28:01AM -0400, Vincent Aniello wrote: Would a NPE-G2 processor be able to handle the microbursts or it a limitation of the 7200 platform? --Vincent -Original Message- From: Rodney Dunn [mailto:[EMAIL PROTECTED] Sent: Thursday, November 01, 2007 10:52 PM To: Justin Shore Cc: Vincent Aniello; cisco-nsp@puck.nether.net Subject: Re: [c-nsp] RX No Buff Errors on 7206 w/NPE-G1 Almost every time I've ever been part of a troubleshooting session for Gige overruns and ignores it's microburst on the segment and the receiving router can't process the frames quick enough. It's so hard to debug because without an analyzer on the wire you can't prove it's a micro burst. The 65xx/76xx can move those frames are wire rate. For small packets the G1 can't. Rodney On Thu, Nov 01, 2007 at 02:41:14PM -0500, Justin Shore wrote: Vincent, I saw a similar problem a couple weeks ago with identical hardware acting as a border router running 12.4(11)T1. I had overruns on Gi0/1 and 2 which connect back to our core 7600s and Gi0/3 which is a 30meg link to one of our upstream providers. Neither interface on either 7600 had any errors. I'm at a loss to explain either of our issues. Justin Vincent Aniello wrote: On a 7206VXR with a NPE-G1 processor I am seeing input errors on a Gigabit Ethernet interface. The input errors are due to ignored packets: ___ 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/ Disclaimer: Any references to Pipeline performance contained herein are based on historic performance levels which Pipeline expects to maintain or exceed but nevertheless does not guarantee. Congested networks, price volatility, or other extraordinary events may impede future trading activities and degrade performance statistics. ___ 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] RX No Buff Errors on 7206 w/NPE-G1
Vincent, I saw a similar problem a couple weeks ago with identical hardware acting as a border router running 12.4(11)T1. I had overruns on Gi0/1 and 2 which connect back to our core 7600s and Gi0/3 which is a 30meg link to one of our upstream providers. Neither interface on either 7600 had any errors. I'm at a loss to explain either of our issues. Justin Vincent Aniello wrote: On a 7206VXR with a NPE-G1 processor I am seeing input errors on a Gigabit Ethernet interface. The input errors are due to ignored packets: ___ 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] RX No Buff Errors on 7206 w/NPE-G1
Hi, Input errors can be noise caused from the sender, bad interface that is. If it continues try swapping the transmitter on the remote end or it might also be a bad fiber pair. If not it might just be a sporadic broadcast storm from the sender. Overruns might also be bad interface or some odd feature in IOS causing databursts but then to the remote end, this since we are the sender. /// Br, Jonas On 1 nov 2007, at 20.41, Justin Shore wrote: Vincent, I saw a similar problem a couple weeks ago with identical hardware acting as a border router running 12.4(11)T1. I had overruns on Gi0/1 and 2 which connect back to our core 7600s and Gi0/3 which is a 30meg link to one of our upstream providers. Neither interface on either 7600 had any errors. I'm at a loss to explain either of our issues. Justin Vincent Aniello wrote: On a 7206VXR with a NPE-G1 processor I am seeing input errors on a Gigabit Ethernet interface. The input errors are due to ignored packets: ___ 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] RX No Buff Errors on 7206 w/NPE-G1
Almost every time I've ever been part of a troubleshooting session for Gige overruns and ignores it's microburst on the segment and the receiving router can't process the frames quick enough. It's so hard to debug because without an analyzer on the wire you can't prove it's a micro burst. The 65xx/76xx can move those frames are wire rate. For small packets the G1 can't. Rodney On Thu, Nov 01, 2007 at 02:41:14PM -0500, Justin Shore wrote: Vincent, I saw a similar problem a couple weeks ago with identical hardware acting as a border router running 12.4(11)T1. I had overruns on Gi0/1 and 2 which connect back to our core 7600s and Gi0/3 which is a 30meg link to one of our upstream providers. Neither interface on either 7600 had any errors. I'm at a loss to explain either of our issues. Justin Vincent Aniello wrote: On a 7206VXR with a NPE-G1 processor I am seeing input errors on a Gigabit Ethernet interface. The input errors are due to ignored packets: ___ 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] RX No Buff Errors on 7206 w/NPE-G1
What code? Are you seeing any throttles? What's the fanout for the multicast? Rodney On Tue, Oct 30, 2007 at 10:12:08PM -0400, Vincent Aniello wrote: On a 7206VXR with a NPE-G1 processor I am seeing input errors on a Gigabit Ethernet interface. The input errors are due to ignored packets: 303 input errors, 0 CRC, 0 frame, 0 overrun, 303 ignored The ignored packets coincide with RX No Buff errors that appear in the output from a 'show controller' command: RX No Buff 303 There is a about 30Mb/s of incoming traffic, mostly multicast, on the interface and according to the show processes cpu history command the maximum CPU over the last 72 hours was 60% with an average CPU of 30% during peak times. Can anyone provide suggestions on how to correct these errors or am I running up against the processing limits of this router? If so, are the RX No Buff errors an indication of a limitation of the Gigabit Ethernet interface or the NPE-G1 CPU in the router? Would upgrading to a NPE-G2 correct the problem? Any assistance would be appreciated. Thanks. --Vincent Disclaimer: Any references to Pipeline performance contained herein are based on historic performance levels which Pipeline expects to maintain or exceed but nevertheless does not guarantee. Congested networks, price volatility, or other extraordinary events may impede future trading activities and degrade performance statistics. ___ 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/
