07-17-2009 01:25 AM - edited 03-04-2019 05:27 AM
Hi I'm having a problem establishing a stable GRE tunnel and was wondering if anyone could help?
Both Routers are 7200s. RouterA is running IOS rev 12.3(4r) and RouterB is running IOS rev: 12.2(5d). Both sides of the tunnel show as UP/UP until I enable keepalives on RouterA (RouterB doesn't seem to support them), then RouterA predictably shows the tunnel as UP/DOWN.
I can ping the local interface on RouterA, but RouterB can't seem to ping it's local interface.
I've changed the IPs, but the config on the tunnels is attached (RouterA.txt & RouterB.txt).
Running a debug on the tunnel produces nothing useable. IP ICMP Debug just shows RouterB encapsulating messages, but nothing is returned.
Setting tunnel mode to be ip-ip allows RouterB to ping it's local interface and allows us to ping down the tunnel.
Any ideas are most welcome!
07-17-2009 05:33 AM
Hi Ray,
Without seeing your routing configuration, I can only think of the recursive routing problem. You can check out this document
http://www.cisco.com/en/US/tech/tk365/technologies_tech_note09186a0080094690.shtml
HTH,
jerry
07-17-2009 03:46 PM
Can you please post your config? For confidentiality purposes, you can black out the IP Addresses, crypto keys, passwords and other details.
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