[126337] in North American Network Operators' Group
Re: BGP and convergence time
daemon@ATHENA.MIT.EDU (Jay Nakamura)
Wed May 12 11:40:52 2010
In-Reply-To: <AANLkTinYKd59NGdGW8i6-uQxMGycsMhB_q4s64_hZs3t@mail.gmail.com>
Date: Wed, 12 May 2010 11:40:29 -0400
From: Jay Nakamura <zeusdadog@gmail.com>
To: Matthew Walster <matthew@walster.org>
Cc: nanog@nanog.org
Errors-To: nanog-bounces+nanog.discuss=bloom-picayune.mit.edu@nanog.org
On Wed, May 12, 2010 at 11:02 AM, Matthew Walster <matthew@walster.org> wro=
te:
> On 12 May 2010 02:36, Scott Weeks <surfer@mauigateway.com> wrote:
>> You set the timers on your side and the two sides negotiate then select =
the lowest timer settings. =A0The BGP session automatically hard resets on =
some equipment when changing the timers, so be aware of that.
>
> Hold timers are negotiated in the OPEN message, I seem to remember, so
> surely you *have* to hard reset the connection to get the lower
> holdtime?
I just tested this and, yes, with Cisco to Cisco, changing the setting
won't reset the connection but you have to reset the connection to
have the value take effect. I need to look up what happens when two
sides are set to different values and which one takes precedent.
