[j-nsp] Junos L3VPN & AS-PATH LOOP

[Rati Jokhadze]

Thank you all for an interesting discussion, my first guess was to use BGP
loops for L3VPN iBGP, but two "looped" AS in AS-PATH tricked me and that's
why routes were not installed in PE2. Debugging showed the route-rejection
message on PE2.

independent-domain is an excellent feature and works well but hides BGP
attributes ( such as Local-pref) in SP CORE.
I tried to use no-attrset but seems the same, at least in the SRX platform.

Thanks!
On Sun, Feb 23, 2020 at 11:38 AM Mark Tinka <mark.tinka at seacom.mu> wrote:

>
>
> On 23/Feb/20 10:46, Saku Ytti wrote:
>
> >
> > So from expressiveness point-of-view, junos can approximate ios
> > behaviour, so either point-of-view can be implemented. But I'm not
> > sure if ios can approximate junos behaviour, maybe with some crazy
> > as_path regexg, something like /(\d+) (?!\1 ?)+(\d+ ?)* \1/ (that
> > already has problems, but didn't spend too much time:)
>
> I haven't quite thought about that, to be honest :-).
>
> In my mind, that's right up there with exotic things like running 2 RPKI
> validators from 2 different vendors. You can, but unlike DNS or IXP
> route servers, the attempt seems too "fancy" for the expected value.
>
> Mark.
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