[j-nsp] EVPN - BGP attribute propagation on MXes

[Michael Hare]

Hello Guillermo-

I had a somewhat similar issue.  For me I was trying to add a normal bgp community in vrf-export to an E-VPN instance.   This config caused RPD core dumps in 18.2 although it worked as I had hoped in 16.1.  JTAC reported at the time: "... using vrf-export in EVPN instance with non-rt target is not yet supported. Please don’t use it until it is officially targeted at 19.4 ... "

-Michael

> -----Original Message-----
> From: juniper-nsp <juniper-nsp-bounces at puck.nether.net> On Behalf Of
> Guillermo Fernando Cotone
> Sent: Wednesday, July 3, 2019 4:16 AM
> To: Alexander Arseniev <arseniev at btinternet.com>
> Cc: Juniper List <juniper-nsp at puck.nether.net>
> Subject: Re: [j-nsp] EVPN - BGP attribute propagation on MXes
> 
> Hi Alexander,
> 
> Not really.
> BGP route propagation works and some attributes are preserved, e.g. as-
> path
> and local-preference, but not the attached communities.
> It looks like they are doing implicitly —in juniper syntax— "then community
> *set* EVPN-EXT-COMM" instead of "*add*" while importing BGP routes into
> EVPN
> .
> 
> Best,
> Guillermo
> 
> On Wed, Jul 3, 2019 at 10:55 AM Alexander Arseniev
> <arseniev at btinternet.com>
> wrote:
> 
> > Hello,
> > On 01/07/2019 15:38, Guillermo Fernando Cotone wrote:
> >
> > Our use-case is to connect BGP islands through an EVPN backbone, and we
> > expect BGP attributes, such as communities, to be propagated over the
> > backbone. Pretty much standard IP-VPN behavior. Also referenced
> here:https://tools.ietf.org/html/draft-rabadan-sajassi-bess-evpn-ipvpn-
> interworking-02#section-4.2
> >
> > I'm not sure if this is actually supported on Juniper. We're
> > running 17.3R3-S2.2.
> >
> > Are You terminating PE-CE BGP on IRB interface on PE side? This is
> > supported from  19.2R1
> >
> >
> > https://www.juniper.net/documentation/en_US/junos/information-
> products/topic-collections/release-notes/19.2/jd0e4828.html#jd0e4903
> >
> > Thanks
> >
> > Alex
> >
> _______________________________________________
> juniper-nsp mailing list juniper-nsp at puck.nether.net
> https://puck.nether.net/mailman/listinfo/juniper-nsp