[j-nsp] Problem with BGP

[Krasimir Avramski]

Hi,
What is the reason of using "local-as
<http://www.juniper.net/documentation/en_US/junos14.1/topics/concept/bgp-local-as-introduction.html>"
feature? You can try to set "loops 2" option as described in the link.

Best Regards,
Krasi


On 28 April 2016 at 09:58, Johan Borch <johan.borch at gmail.com> wrote:

> 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.
> >
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