vrf aware mGRE traffic fails if mpls ip is enabled globally
I have a strange one. When I have mpls enabled globally on a PE device which has a mGRE tunnel configured with a vrf (not to run mpls), packets from one end of the the tunnel to the other do not work. As soon as I disable mpls globally(no mpls ip), the packets traverse the tunnel. Also, if I shut and no shut one of the port channel interfaces running mpls, traffic traverses for a short while then fails to traverse.
All of this is on 6500's with SUP-7203B's. Its not just on one 6500. It does it on all of them. My P and PE's have mpls running on port-channel interfaces (20GB port-channel), using the WS-X6704 with DFC3B's installed. I am also running 12.2(18)SXF6 enterprise services.
Example of config is attached minus the ospf vrf process and global ospf process details.
Even if I remove the vrf on all tunnels, it still fails. I even converted to point to point tunnels and it still fails.
Anyone have any ideas...I'll be glad to hear from you
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