Interface tracking(MPLS with BGP)

[Raghavendra Rai]

Dear all,

I have a customer with 10 locations connected to their hub location via MPLS from two different ISP's

ISP1- Primary MPLS

ISP2-Secondary MPLS

at 5 locations including hub they are running BGP with MPLS.(No problem here)

in remaining 5 locations they have static route toward their MPLS PE and they are running IPSLA for failover between ISP1and ISP2

Now since there is no BGP here (static route from PE and this static route is injected inside BGP) if this last mile goes down Hub location router will not learn that this route is failed

So return traffic from Hub router will come via this route even this link is down ( Last mile down where static route is given from PE)

How can we resolve this issue? Can anyone please suggest?

Thanks,

Raghavendra

[Raghavendra Rai]

Hello all,

Any inputs?

Thanks,

Raghavendra

[Peter Paluch]

Hello Raghavendra,

The only thing I can currently think of is configuring your PE routers with IP SLA to ping the CE spokes (each PE pings its connected CE), and if the ping fails, the static route is removed from the PE's routing table and thus from BGP. Obviously, when the last mile link fails, the PE interface does not go down - do I get that correctly?

Best regards,

Peter