nanog mailing list archives
RE: Soliciting your opinions on Internet routing: A survey on BGP convergence
From: "Jakob Heitz (jheitz)" <jheitz () cisco com>
Date: Tue, 10 Jan 2017 19:51:57 +0000
Hi Baldur, Have you tried graceful shutdown? You need redundant links, but not to the same transit. https://tools.ietf.org/html/draft-ietf-grow-bgp-gshut-06 This draft is expired, but it is actually implemented by several vendors. I implemented this. http://www.slideshare.net/bduvivie/bgp-graceful-shutdown-ios-xr I added an option to configure AS-path prepends in case the gshut community was not supported by peers. Thanks, Jakob.
Date: Tue, 10 Jan 2017 03:51:04 +0100 From: Baldur Norddahl <baldur.norddahl () gmail com> Hello I find that the type of outage that affects our network the most is neither of the two options you describe. As is probably typical for smaller networks, we do not have redundant uplinks to all of our transits. If a transit link goes, for example because we had to reboot a router, traffic is supposed to reroute to the remaining transit links. Internally our network handles this fairly fast for egress traffic. However the problem is the ingress traffic - it can be 5 to 15 minutes before everything has settled down. This is the time before everyone else on the internet has processed that they will have to switch to your alternate transit. The only solution I know of is to have redundant links to all transits. Going forward I will make sure we have this because it is a huge disadvantage not being able to take a router out of service without causing downtime for all users. Not to mention that a router crash or link failure that should have taken seconds at most to reroute, but instead causes at least 5 minutes of unstable internet. Regards, Baldur
Current thread:
- Soliciting your opinions on Internet routing: A survey on BGP convergence Laurent Vanbever (Jan 09)
- Re: Soliciting your opinions on Internet routing: A survey on BGP convergence Baldur Norddahl (Jan 09)
- Re: Soliciting your opinions on Internet routing: A survey on BGP convergence Job Snijders (Jan 10)
- Re: Soliciting your opinions on Internet routing: A survey on BGP convergence Hugo Slabbert (Jan 10)
- Re: Soliciting your opinions on Internet routing: A survey on BGP convergence Jared Mauch (Jan 10)
- Re: Soliciting your opinions on Internet routing: A survey on BGP convergence Mike Jones (Jan 10)
- Re: Soliciting your opinions on Internet routing: A survey on BGP convergence Job Snijders (Jan 10)
- Re: Soliciting your opinions on Internet routing: A survey on BGP convergence Laurent Vanbever (Jan 10)
- Re: Soliciting your opinions on Internet routing: A survey on BGP convergence Baldur Norddahl (Jan 09)
- Re: Soliciting your opinions on Internet routing: A survey on BGP convergence joel jaeggli (Jan 09)
- Re: Soliciting your opinions on Internet routing: A survey on BGP convergence Laurent Vanbever (Jan 10)
- <Possible follow-ups>
- RE: Soliciting your opinions on Internet routing: A survey on BGP convergence Jakob Heitz (jheitz) (Jan 10)
- RE: Soliciting your opinions on Internet routing: A survey on BGP convergence Jakob Heitz (jheitz) (Jan 11)