Need help with MPLS TE Tunnel

[zeeshanbasit25789]

Working on the following topology.

MPLS TE Tunnel on PE1 is successfuly configured.

but I cannot reach CustomerB from PE1. The control plane information seems to be ok but I am not sure if the data plane is broken.  Any help is appreciated.

[MHM Cisco World]

did you change LO IP?

[zeeshanbasit25789]

@MHM Cisco World The mistake @Harold Ritter  identified solved the problem.

[Harold Ritter]

Hi @MHM Cisco World ,

This is what the "tunnel mpls traffic-eng autoroute announce" does.

There is no need to do filtering or to exclude lo0 from the IGP.

[Harold Ritter]

Hi @zeeshanbasit25789 ,

The config you provided doesn't match the "show mpls for" output.

Can you provide a "show run int gi0/2" and "sh ip ro vrf CE-A" output from PE2?

[zeeshanbasit25789]

Hi @Harold Ritter ,

[Harold Ritter · Accepted solution]

Hi @zeeshanbasit25789 ,

I see what the issue is. You are advertising 155.1.19.0/25 from CustomerB, which is more specific than the directly connected route used on PE2 (155.1.19.0/24).

Please remove this advertisement on CustomerB and the issue should be solved.

[zeeshanbasit25789]

Hi @Harold Ritter ,

Thank you very much. I solved the problem. Can you also tell me how I can clear the mpls forwarding table, I mean once the MPLS is configured and I forgot to define the range, once I define the range later it does not take effect so I want to clear the table for that.

[Harold Ritter]

Hi @zeeshanbasit25789 ,

There is not one command to clear the lfib (like clear ip route * for the rib). You can clear the protocols contributing to the lfib (bgp, rsvp, ldp, static, etc) one by one.

The easiest way (and probably the safest) is to reload the router after changing the mpls label range.

[zeeshanbasit25789]

Hi @Harold Ritter ,

I have couple of more questions and I'd understrand if you'll not have the time to answer.

If I have multiple customers behind PE1 and PE2 and create multiple tunnels, how can I make sure that traffice from particular customer goes through a specific tunnel. I tried using route map and apply with the neighbor statement under BGP vrf address family but it's not possible.

Is it possible to do load balance with MPLS TE, is it advisable, if yes than should it be with multiple tunnels or is it possible creating different path options for the same tunnel.

Can you suggest some good read on MPLS TE?

[Harold Ritter]

Hi @zeeshanbasit25789 ,

Please create a new post with these additional questions and we will address them. It will make it easier for other community users to find a solution if they run into similar issues.

[zeeshanbasit25789]

Hi @Harold Ritter,

I have, thank you.