I have a problem setting up GRE tunnel ( w/o any encryption) between Cisco 2611 and 2621. IOS version is the same c2600-ik9o3s3-mz.123-26.bin.
The problem is that after configuring both devices I can not ping 2611 from 2621 over tunnel. I added a rule on 2611 WAN interface, so I could see incoming GRE packets. During the ping process I do NOT see any matches on this rule. But as soon as I ping 2621 from 2611, 2621 can ping 2611 as well and I see matches on this rule.
The same thing happens with IPSEC tunnel, but first I would like to resolve issue with GRE as I think the have the same roots.
Can you please advice how I can resolve this issue ?
Can you ping each destination when sourcing from the tunnel source? For example, can you ping, from the 2621, 220.127.116.11 when sourcing from 18.104.22.168? If you have an acl on the interface, you'll want to allow gre through the acl:
I believe that John was on the right track in asking to see some of what you have configured. But we need to see more than just the tunnel interface configuration (and I do not see any particular issue with the tunnel configuration). So perhaps the issue is about the physical interfaces? It might be helpful if you would post the complete router config. And if you do not want to post the complete config then at least post the interface configurations, the output of show ip route, and the output of show arp from both routers.
The symptom that you must start the ping from one side and then the other side will work suggests that there is some issue with how the routers are connected. How does 22.214.171.124 get to 126.96.36.199? What is the physical topology?
Hi everyone, I would like to thank you in advance for any help you can provide a newcomer like myself!
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