nanog mailing list archives
Re: Strange connectivity issue Frontier EVPL
From: Mike Hammett <nanog () ics-il net>
Date: Fri, 6 Nov 2020 14:18:44 -0600 (CST)
This is my biggest complaint about non-wavelength transport. The provider is overselling a port somewhere in the circuit, unless it's a wave. ----- Mike Hammett Intelligent Computing Solutions Midwest Internet Exchange The Brothers WISP ----- Original Message ----- From: will () loopfree net To: nanog () nanog org Sent: Friday, November 6, 2020 11:54:53 AM Subject: Re: Strange connectivity issue Frontier EVPL I have similar Frontier NNI's out of One Wilshire, some 1gig some 10. While I haven't seen the half-IP-reachable issue you describe I have spent days and days chasing performance issues on them. I finally got gig line-rate capable iperf3 boxes at both ends and see distinct differences in single-TCP stream performance vs running 3-4 streams, and the difference disappears like clockwork at "unbusy hours" (1am-7am) every day. After running hundreds of tests and adjusting my buffering and RED on both ends of these circuits I just have come to the conclusion that they have some LAGs somewhere "in the middle" that get busy during the day, and they don't care if I have to run 4 TCP streams to max a 1gig circuit. It makes browser-based speedtests look really bad but otherwise the circuits are usable. We're trying to replace the worst ones with wavelength services. -Will Orton On Fri, Nov 06, 2020 at 08:59:28AM -0800, Jay Hennigan wrote:
We have a strange issue that defies logic. We have a NNI at our POP with Frontier serving as an aggregation circuit with different customers on different VLANs. It's working well to several customers. Bringing up a new customer shows roughly half of the IP addresses unreachable across the link, as if there's some kind of load-balancing or hashing function that's mis-directing half of the traffic. It's consistent, if an address is reachable it's always reachable. If it's not reachable, it's never reachable. Everything ARPs fine. The Frontier circuit is layer 2 so shouldn't care about IP addresses. Frontier tech shows no trouble. They changed the RAD device on-premise. We've triple-checked configurations, torn down and rebuilt subinterface, etc. with no joy. Any suggestions? -- Jay Hennigan - jay () west net Network Engineering - CCIE #7880 503 897-8550 - WB6RDV
Current thread:
- Strange connectivity issue Frontier EVPL Jay Hennigan (Nov 06)
- Re: Strange connectivity issue Frontier EVPL Matt Hoppes (Nov 06)
- RE: Strange connectivity issue Frontier EVPL aaron1 (Nov 06)
- Re: Strange connectivity issue Frontier EVPL Jay Hennigan (Nov 06)
- Re: Strange connectivity issue Frontier EVPL Jeff Richmond (Nov 06)
- Re: Strange connectivity issue Frontier EVPL will (Nov 06)
- Re: Strange connectivity issue Frontier EVPL Mike Lyon (Nov 06)
- Re: Strange connectivity issue Frontier EVPL Jay Hennigan (Nov 06)
- Re: Strange connectivity issue Frontier EVPL Mike Lyon (Nov 06)
- Re: Strange connectivity issue Frontier EVPL Karsten Thomann via NANOG (Nov 06)
- Re: Strange connectivity issue Frontier EVPL Mike Lyon (Nov 06)
- Re: Strange connectivity issue Frontier EVPL Mike Hammett (Nov 06)
- RE: Strange connectivity issue Frontier EVPL aaron1 (Nov 06)
- Re: Strange connectivity issue Frontier EVPL Tim Burke (Nov 09)
- Re: Strange connectivity issue Frontier EVPL Adam Korab (Nov 10)
- Re: Strange connectivity issue Frontier EVPL Matt Hoppes (Nov 06)