[193319] in North American Network Operators' Group
Re: Soliciting your opinions on Internet routing: A survey on BGP
daemon@ATHENA.MIT.EDU (Job Snijders)
Tue Jan 10 14:58:08 2017
X-Original-To: nanog@nanog.org
Date: Tue, 10 Jan 2017 20:58:02 +0100
From: Job Snijders <job@instituut.net>
To: Baldur Norddahl <baldur.norddahl@gmail.com>
In-Reply-To: <5056b52a-303a-be5a-dfc2-d0f9ca9b9cfc@gmail.com>
Cc: nanog@nanog.org
Errors-To: nanog-bounces@nanog.org
On Tue, Jan 10, 2017 at 03:51:04AM +0100, Baldur Norddahl wrote:
> 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.
Alternatively, if you reboot a router, perhaps you could first shutdown
the eBGP sessions, then wait 5 to 10 minutes for the traffic to drain
away (should be visible in your NMS stats), and then proceed with the
maintenance?
Of course this only works for planned reboots, not suprise reboots.
Kind regards,
Job
