[j-nsp] Problem with BGP

[Mark Tinka]

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.