nanog mailing list archives
Re: A survey on BGP MRAI timer values in practice
From: Adam Thompson <athompson () merlin mb ca>
Date: Thu, 10 Jun 2021 15:12:08 +0000
My question at this point is, what slow global convergence? When I (or any of my downstreams) adjusts a prefix, I nearly always see global propagation in well under 60 seconds. Among networks where I can check, at least. I understand it could be technically possible to see near-instantaneous global convergence in more like <5sec, but... on a global scale, neither I nor my customers care about the difference between 5s and 60s. Do other people need <60s propagation? -Adam ________________________________ From: NANOG <nanog-bounces+athompson=merlin.mb.ca () nanog org> on behalf of Mark Tinka <mark@tinka.africa> Sent: June 10, 2021 02:36 To: nanog () nanog org <nanog () nanog org> Subject: Re: A survey on BGP MRAI timer values in practice On 6/10/21 08:26, Saku Ytti wrote:
I don't understand the question, but the way I read the question it may be unanswerable even if I did understand it. As the reader would self-define negligible and well acceptable and answer yes/no based on the definition they used, which might be different to the definition writer intended.
It's possible we've become accustom to a slow, global BGP, due to a perception of fragility (and complexity), which favours stability over speed. I suppose the size of the current BGP and the nature of the FSM it lends itself to does some to account for those perceptions. At a per-ISP level, it is not impossible to speed up (i)BGP convergence. On a global scale, taking the least common denominator to allow for all manner of network we don't know about, allowing the ship a wide turn in BGP waters, at least on a perceptive level, seems like an unsigned social agreement amongst autonomous systems. Ultimately, I feel we aren't talking enough about this, and hopefully, this thread gets us to that point. Mark.
Current thread:
- A survey on BGP MRAI timer values in practice shahrooz (Jun 07)
- Re: A survey on BGP MRAI timer values in practice Saku Ytti (Jun 07)
- Re: A survey on BGP MRAI timer values in practice Adam Thompson (Jun 08)
- Re: A survey on BGP MRAI timer values in practice Saku Ytti (Jun 08)
- Re: A survey on BGP MRAI timer values in practice Randy Bush (Jun 09)
- Re: A survey on BGP MRAI timer values in practice Saku Ytti (Jun 09)
- Re: A survey on BGP MRAI timer values in practice Mark Tinka (Jun 10)
- Re: A survey on BGP MRAI timer values in practice Adam Thompson (Jun 10)
- Re: A survey on BGP MRAI timer values in practice Adam Thompson (Jun 08)
- Re: A survey on BGP MRAI timer values in practice Saku Ytti (Jun 07)
- <Possible follow-ups>
- Re: A survey on BGP MRAI timer values in practice Jakob Heitz (jheitz) via NANOG (Jun 09)