nanog mailing list archives
Re: Level(3) ex-twtelecom midwest packet loss (4323)
From: Randy <nanog () afxr net>
Date: Fri, 28 Aug 2015 13:48:26 -0500
On 8/27/2015 11:00 PM, Mike Hammett wrote:
I was having major issues yesterday. It wasn't with all traffic, and its seemed to have cleared up now. I did do packet inspections, and I kept getting ethernet frame check errors from certain sources. vast majority of packets did not have this extra data appended to the tcp portion of packet, and I think that is likely the reason for the issues, since those packets are supposed to be dropped if there is a checksum error. I'm by no means an expert, just voicing what I was seeing.08/28/2015 3:08 AM GMT Event Conclusion Summary Start: August 27, 2015 13:20 GMT Stop: August 28, 2015 00:00 GMT Root Cause: A protocol issue impacted IP services in multiple markets. Fix Action: Adjustments were made to clear the errors. Summary: The IP NOC began investigating the root cause with Tier III Technical Support. It was reported that the issue was causing packet loss for customers. Operations Engineering teams were engaged, and Field Services were dispatched to a site in Chicago, IL to assist with investigations. Troubleshooting identified a protocol issue, and Operations Engineering worked with Tier III Technical Support to perform adjustments on the links. It was confirmed that the errors cleared. The traffic load was also lowered on cards in Chicago to alleviate any further issues. Should any additional impact be experienced, please contact the Level 3 Technical Service Center. What the hell is a "protocol issue"? I'm not an idiot, you can tell me specifically what happened...
----- Mike Hammett Intelligent Computing Solutions http://www.ics-il.com ----- Original Message ----- From: "Ryan Gelobter" <ryan.g () atwgpc net> To: "Mel Beckman" <mel () beckman org> Cc: "<nanog () nanog org>" <nanog () nanog org> Sent: Thursday, August 27, 2015 3:14:59 PM Subject: Re: Level(3) ex-twtelecom midwest packet loss (4323) If you have access to the Level3 portal you should see ticket #9639047 under Network Events now. Event Summary:IP Network Event ~ Multiple Markets 08/27/2015 8:05 PM GMT Level 3 Tier III and Operations Engineering teams have identified Internet Protocols dropping, affecting customer services. Restoration efforts are in progress, but an estimated time of restoral is not available at this time. 08/27/2015 6:36 PM GMT IP and Transport Tier III, Operations Engineering and Field Services continue collaboratively working the issue. 08/27/2015 4:59 PM GMT Operations Engineering is engaged and Field Services is on site in Chicago, IL investigating the issue. 08/27/2015 4:38 PM GMT The engineers are currently migrating traffic in efforts of restoring services while troubleshooting continues. Field Services is being dispatched to a Chicago, IL site to assist. 08/27/2015 4:21 PM GMT IP services are affected across multiple markets and the root cause is currently under investigation. The IP NOC and IP and Transport Tier III are actively troubleshooting and working to isolate the cause. The engineers have detected peering issues which are resulting in packet loss for customers. Please be advised that updates will be provided at minimum of hourly unless otherwise noted.
Current thread:
- Re: Level(3) ex-twtelecom midwest packet loss (4323), (continued)
- Re: Level(3) ex-twtelecom midwest packet loss (4323) Mel Beckman (Aug 27)
- Message not available
- Re: Level(3) ex-twtelecom midwest packet loss (4323) Ryan Gelobter (Aug 27)
- Re: Level(3) ex-twtelecom midwest packet loss (4323) Mike Hammett (Aug 27)
- Re: Level(3) ex-twtelecom midwest packet loss (4323) Jason Canady (Aug 28)
- Re: Level(3) ex-twtelecom midwest packet loss (4323) Blake Dunlap (Aug 28)
- Re: Level(3) ex-twtelecom midwest packet loss (4323) Mel Beckman (Aug 28)
- Re: Level(3) ex-twtelecom midwest packet loss (4323) James Sink (Aug 28)
- Re: Level(3) ex-twtelecom midwest packet loss (4323) Paras (Aug 28)
- Re: Level(3) ex-twtelecom midwest packet loss (4323) chris (Aug 28)
- Re: Level(3) ex-twtelecom midwest packet loss (4323) chris (Aug 28)
- Re: Level(3) ex-twtelecom midwest packet loss (4323) Randy (Aug 28)
- Re: Level(3) ex-twtelecom midwest packet loss (4323) Mel Beckman (Aug 28)