[j-nsp] MC-LAG on QFX5100

[Matt Freitag]

Is there something preventing you from using VCF or qfabric?

On Jul 9, 2017 7:25 AM, "Vincent Bernat" <bernat at luffy.cx> wrote:

>  ❦  9 juillet 2017 09:07 GMT, "Jackson, William" <
> william.jackson at gibtele.com> :
>
> > We have been testing an MC-LAG active/active setup on qfx5100 using the
> latest 14.1x53 code.
> > We are seeing issues when using L3 in the MC-LAG.
> > We are using IRB with VRRP on a number of vlans that face the downstream
> client.
> > It seems that in active/active both nodes process traffic even if they
> > are not the VRRP master, so we have taken that into account.
> >
> > The issue we are seeing seems to be that the ARP sync is not working on
> the ICCP between the peers.
> > We can reach downstream nodes via one peer but not the other.
> > And it works correctly on some vlans but not others so isn’t related to
> the downstream client.
> >
> > JTAC is on it albeit at snail’s pace.
> >
> > Has anyone got this working on qfx5100 and can share some config
> > examples?
>
> I ran into similar limitations with the same version. I have tried both
> MAC synchronization and VRRP. When packets hit the "wrong" node (the one
> that didn't learn the neighbor information), they are not
> forwarded. See:
>
>  https://lists.gt.net/nsp/juniper/60956#60956
>
> I got additional private feedback from people with similar issues
> (MC-LAG and L3 forwarding). I didn't try to involve JTAC.
> --
> Don't stop at one bug.
>             - The Elements of Programming Style (Kernighan & Plauger)
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