[AusNOG] BGP hold timer values

[Alex Samad - Yieldbroker]

Hi

Okay its eBGP, currently have 4 providers, some with multiple connections. So I am thinking 6 / 20 might be good for me, business requirement for approx. 30sec response.
I am presuming all I am looking at is extra BGP packets .. every 6 sec compared to 1 min..


Alex

> -----Original Message-----
> From: David Hughes [mailto:david at hughes.com.au]
> Sent: Tuesday, 27 January 2015 9:37 PM
> To: Alex Samad - Yieldbroker
> Cc: ausnog at lists.ausnog.net
> Subject: Re: [AusNOG] BGP hold timer values
> 
> 
> I gave a lightning talk about this sort of thing a while ago at an APRICOT.  I just
> googled to find the slides and can now see just how many years ago it was.
> Gotta say I'm feeling old :)
> 
> But, it's probably still relevant although the defaults may have changed.  This
> reflected what we were running at the time - and we were trying to be
> pretty aggressive.
> 
> 	http://archive.apnic.net/meetings/21/docs/sigs/routing/routing-
> pres-hughes-bgp.pdf
> 
> For reference I'm currently happy to run
> 
> 	eBGP	: 10 / 30
> 	iBGP	: 5 / 15
> 
> And I'd run this even to a single upstream.  If it fails at least you'll have
> something in your logs to say why you fell off the net for a while.  Silent
> failures are a bugger to troubleshoot.
> 
> 
> Thanks
> 
> David
> ...
> 
> 
> 
> On 27/01/2015, at 6:47 PM, Alex Samad - Yieldbroker
> <Alex.Samad at yieldbroker.com> wrote:
> 
> > Hi
> >
> > I'm wonder what is considered "best practice" or good/responsible hold
> timer values for BGP.
> >
> > Currently I'm set at 3m, but I am considering lowering this to 30s and keep
> alive down to 20s, potentially even lower. Or if possible to use BFD & BGP,
> what's the uptake on BFD ?
> >
> > Alex
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