nanog mailing list archives
Re: best practice for advertising peering fabric routes
From: "Dobbins, Roland" <rdobbins () arbor net>
Date: Wed, 15 Jan 2014 14:49:10 +0000
On Jan 15, 2014, at 9:18 PM, Leo Bicknell <bicknell () ufp org> wrote:
However, a good engineer would know there are drawbacks to next-hop-self, in particular it slows convergence in a number of situations. There are networks where fast convergence is more important than route scaling, and thus the traditional design of BGP next-hops being edge interfaces, and edge interfaces in the IGP performs better.
A good engineer also knows that there are huge drawbacks to having a peer's network infrastructure DDoSed, routes flapping, core bandwidth consumed by tens and hundreds of gb/sec of attack traffic, et. al., too. ;>
By attempting to force IX participants to not put the route in IGP, those IX participants are collectively deciding on a slower converging network for everyone. I don't like a world where connecting to an exchange point forces a particular network design on participants.
Concur. But that's the world we live in, unfortunately. It's just another example of the huge, concentric nature of the collateral damage arising from DDoS attacks, both from the attacks themselves, and from the compromises folks have to make in order to increase resilience against such attacks.
That's some circular reasoning.
Not really. What I'm saying is that since PMTU-D is already broken on so many endpoint networks - i.e., where traffic originates and where it terminates - that any issues arising from PMTU-D irregularities in IXP networks are trivial by comparison. ----------------------------------------------------------------------- Roland Dobbins <rdobbins () arbor net> // <http://www.arbornetworks.com> Luck is the residue of opportunity and design. -- John Milton
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Current thread:
- Re: best practice for advertising peering fabric routes, (continued)
- Re: best practice for advertising peering fabric routes Patrick W. Gilmore (Jan 15)
- RE: best practice for advertising peering fabric routes Siegel, David (Jan 15)
- Re: best practice for advertising peering fabric routes William Herrin (Jan 15)
- Re: best practice for advertising peering fabric routes Florian Weimer (Jan 18)
- Re: best practice for advertising peering fabric routes Leo Bicknell (Jan 14)
- Re: best practice for advertising peering fabric routes Patrick W. Gilmore (Jan 14)
- Re: best practice for advertising peering fabric routes Leo Bicknell (Jan 14)
- Re: best practice for advertising peering fabric routes Patrick W. Gilmore (Jan 14)
- Re: best practice for advertising peering fabric routes Dobbins, Roland (Jan 14)
- Re: best practice for advertising peering fabric routes Leo Bicknell (Jan 15)
- Re: best practice for advertising peering fabric routes Dobbins, Roland (Jan 15)
- Re: best practice for advertising peering fabric routes Leo Bicknell (Jan 15)
- Re: best practice for advertising peering fabric routes Dobbins, Roland (Jan 15)
- Re: best practice for advertising peering fabric routes Leo Bicknell (Jan 15)
- Re: best practice for advertising peering fabric routes Dobbins, Roland (Jan 15)
- Re: best practice for advertising peering fabric routes Patrick W. Gilmore (Jan 14)
- Re: best practice for advertising peering fabric routes Saku Ytti (Jan 15)
- Re: best practice for advertising peering fabric routes Martin Pels (Jan 18)
- Re: best practice for advertising peering fabric routes Jim Shankland (Jan 15)
- Re: best practice for advertising peering fabric routes Joe Abley (Jan 15)
- Re: best practice for advertising peering fabric routes Niels Bakker (Jan 15)
- Re: best practice for advertising peering fabric routes Christopher Morrow (Jan 15)