[j-nsp] Problem with BGP

[Johan Borch]

Hi

Both cisco and Juniper have as-override configured on their external
session. But the problem is when I shut down the juniper peer. Routes
receieved from cisco is still hidden and looped.

Johan

On Wed, Apr 27, 2016 at 11:02 PM, Mark Tinka <mark.tinka at seacom.mu> wrote:

>
>
> On 27/Apr/16 19:59, Johan Borch wrote:
>
> > Hi
> >
> > I have a problem that perhaps the experts on this list can help me shed
> > some light on :)
> >
> > The problem involves two PE routers one Cisco IOS and one Juniper MX.
> MPLS
> > & co between them. Each PE have a VRF, same route-target. Each of these
> > PE-routers have a BGP session inside the VRF that connects to a customer
> > site via supplier and a leased line. These leased lines should be
> redundant
> > for each other.
> >
> > Both BGP sessions use local as AS65534 and supplier on other side is
> > AS65535. Sessions are up and I'm receiving routes from supplier in each
> PE.
> >
> > Now to my problem.
> >
> > If I cut the leased line on the Cisco PE it will populate the vrf routing
> > table on the Cisco PE with routes from the Juniper PE learned over MPLS,
> no
> > problem.
> > If I cut the leased line on the Juniper PE then Juniper PE should learn
> the
> > routes from the Cisco PE, but all routes are hidden and Juniper thinks
> that
> > AS65534 is looped.
> >
> > If I check a route on Juniper PE it says:
> >
> > AS path: $MY_MPLS_NET_AS 65534 65535 $SUPPLIER_AS $SUPPLIER_AS I (Looped:
> > 65534) (sorry for the obfuscation)
> >
> > State: <Secondary Hidden Int Ext ProtectionCand>
> >
> > Hidden reason: reason not available
> >
> > VRF on Juniper side is configured with:
> > autonomous-system 64560 independent-domain
> >
> > What am I missing? Can I tell JunOS do not think it is a loop somehow?
> > Would it be easier to peer with different ASN from each PE?
>
> Do you have "as-override" configured on the Juniper VRF?
>
> Mark.
>