nanog mailing list archives

Re: Juniper BGP Convergence Time


From: Ben Cannon <ben () 6by7 net>
Date: Tue, 15 May 2018 17:28:01 -0700

Have you checked your timeouts ?

-Ben

On May 15, 2018, at 4:09 PM, Kaiser, Erich <erich () gotfusion net> wrote:

Do you need full routes?  What about just a default route from BGP?

Erich Kaiser
The Fusion Network
erich () gotfusion net
Office: 815-570-3101




On Tue, May 15, 2018 at 5:38 PM, Aaron Gould <aaron1 () gvtc com> wrote:

You sure it doesn't have something to do with 60 seconds * 3 = 180 secs of
BGP neighbor Time out before it believes neighbor is dead and remove routes
to that neighbor?

Aaron

On May 15, 2018, at 9:10 AM, Adam Kajtar <akajtar () wadsworthcity org>
wrote:

Hello:

I'm running two Juniper MX104s. Each MX has 1 ISP connected running
BGP(full routes). iBGP is running between the routers via a two port 20G
lag. When one of the ISPs fails, it can take upwards of 2 minutes for
traffic to start flowing correctly. The router has the correct route in
the
routing table, but it doesn't install it in the forwarding table for the
full two mins.

I have a few questions if anyone could answer them.

 - What would a usual convergence time be for this setup?
 - Is there anything I could do speed this process up? (I tried
Multipath)
 - Any tips and tricks would be much appreciated

Thanks in Advance
--
Adam Kajtar
Systems Administrator
City of Wadsworth
akajtar () wadsworthcity org
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