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Silver

Specific VPNs through TE Tunnel

I want to setup a Traffic Engineering tunnel across two PEs. The challenge is that I wish that some specific VPN use this tunnel, while other VPN use another route. In case of failure though, the traffic should failover. How do I specify which VPN can or cannot use the TE Tunnel?

1 ACCEPTED SOLUTION

Accepted Solutions
Cisco Employee

Re: Specific VPNs through TE Tunnel

You could use the "bgp next-hop" command under a specific "ip vrf " to specify what next hop is used when advertising prefixes belonging to that VRF into VPNv4. By using a different NH you could forward traffic for this VRF via a specific tunnel. If the tunnel ever goes down, traffic to that NH would then be forwarded using the LSP built via LDP.

Let me know if I answered your question,

Harold Ritter
Sr. Technical Leader
CCIE 4168 (R&S, SP)
harold@cisco.com
México móvil: +52 1 55 8312 4915
Cisco México
Paseo de la Reforma 222
Piso 19
Cuauhtémoc, Juárez
Ciudad de México, 06600
México
4 REPLIES
Cisco Employee

Re: Specific VPNs through TE Tunnel

You could use the "bgp next-hop" command under a specific "ip vrf " to specify what next hop is used when advertising prefixes belonging to that VRF into VPNv4. By using a different NH you could forward traffic for this VRF via a specific tunnel. If the tunnel ever goes down, traffic to that NH would then be forwarded using the LSP built via LDP.

Let me know if I answered your question,

Harold Ritter
Sr. Technical Leader
CCIE 4168 (R&S, SP)
harold@cisco.com
México móvil: +52 1 55 8312 4915
Cisco México
Paseo de la Reforma 222
Piso 19
Cuauhtémoc, Juárez
Ciudad de México, 06600
México
Silver

Re: Specific VPNs through TE Tunnel

Oops, sorry Harold, I never mentioned that this solved my problem. I noticed though that only loopbacks can be used as the BGP next hops. Any workaround this.

Cisco Employee

Re: Specific VPNs through TE Tunnel

Not really. What is the issue with using a loopback interface as the BGP next-hop.

Thanks,

Harold Ritter
Sr. Technical Leader
CCIE 4168 (R&S, SP)
harold@cisco.com
México móvil: +52 1 55 8312 4915
Cisco México
Paseo de la Reforma 222
Piso 19
Cuauhtémoc, Juárez
Ciudad de México, 06600
México
Silver

Re: Specific VPNs through TE Tunnel

No issue actually, just thinking of scenarios.

If I have multiple TEs, and I want a differentiated service such that different traffic types can use different tunnel. And this in an MPLS VPN scenario?

Do you have any ideas?

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