Re: Validating multi-path in production?

2021-11-26 Thread Mark Tinka
On 11/12/21 23:47, Jeff Tantsura wrote: LAG - Micro BFD (RFC7130) provides per constituent livability. Not sure if this has changed, but the last time I looked into it, Micro BFD's for LAG's was only supported and functional on point-to-point Ethernet links. In cases where you are

Re: Validating multi-path in production?

2021-11-15 Thread Tom Beecher
losion - I *think* I > can skip that part. > -Adam > > Get Outlook for Android <https://aka.ms/AAb9ysg> > -- > *From:* James Bensley > *Sent:* Sunday, November 14, 2021 5:29:25 AM > *To:* Adam Thompson ; nanog > *Subject:* Re: Validating

Re: Validating multi-path in production?

2021-11-14 Thread Martijn Schmidt via NANOG
. Best regards, Martijn From: NANOG on behalf of Adam Thompson Sent: 14 November 2021 17:20 To: James Bensley ; nanog Subject: Re: Validating multi-path in production? The problem I'm looking to solve is the logical opposite, I think: I want to demonstrate

Re: Validating multi-path in production?

2021-11-14 Thread Adam Thompson
___ From: James Bensley Sent: Sunday, November 14, 2021 5:29:25 AM To: Adam Thompson ; nanog Subject: Re: Validating multi-path in production? On Fri, 12 Nov 2021 at 16:54, Adam Thompson mailto:athomp...@merlin.mb.ca>> wrote: The best I've come up with so far is to have two test

Re: Validating multi-path in production?

2021-11-14 Thread James Bensley
On Fri, 12 Nov 2021 at 16:54, Adam Thompson wrote: > The best I've come up with so far is to have two test systems (typically > VMs) that use adjacent IP addresses and adjacent MAC addresses, and test > both inbound and outbound to/from those, blindly trusting/hoping that > hashing algorithms

Re: Validating multi-path in production?

2021-11-13 Thread Saku Ytti
On Fri, 12 Nov 2021 at 17:55, Adam Thompson wrote: > The best I've come up with so far is to have two test systems (typically VMs) > that use adjacent IP addresses and adjacent MAC addresses, and test both > inbound and outbound to/from those, blindly trusting/hoping that hashing > algorithms

Re: Validating multi-path in production?

2021-11-12 Thread Jeff Tantsura
LAG - Micro BFD (RFC7130) provides per constituent livability. MLAG is much more complicated (there’s a proposal in IETF but not progressing), so LACP is pretty much the only option. ECMP could use old/good single hop BFD per pair. Practically - if you introduce enough flows with one of the hash

Validating multi-path in production?

2021-11-12 Thread Adam Thompson
Hello all. Over time, we've run into occurrences of both bugs and human error, both in our own gear and in our partner networks' gear, specifically affecting multi-path forwarding, at pretty much all layers: Multi-chassis LAG, ECMP, and BGP MP. (Yes, I am a corner-case magnet. Lucky me.)