Over router A, I can ping 172.16.1.2 but cannot ping 172.16.1.1. After 30 minutes, I can start pinging 172.16.1.1 but cannot get 100% reply. If I use tunnel mode ipip, I can ping 172.16.1.1 instantly. or if I use routing protocol with neighbors concept like eigrp/ospf, I can ping 172.16.1.1. if I use rip, I cannot ping 172.16.1.1.
Over router B, same thing happen, I can ping 172.16.1.1 but cannot ping 172.16.1.2 when I use GRE encapsulation.
I wish I had an answer to your question but instead I am wondering where you found the information to configure your routers for the GRE tunnels. I am looking to do the same thing here but for some reason I am not finding the right document to help me out!
I have had a similar problem, but it doesn't matter, you are trying to ping a virtual interface on your current router, pinging the other end of the tunnel and issuing the command sh int tunnelx of your current router would show the tunnel is up, and I assume that is what you are trying to do. The best test is telent to router2, configure a loopback interface, address it as anything, go to router1, configure a static route>> ip route (address of loopback on router2) tunnel x (this route says to get to the loopback interface, go into the tunnel, if you can ping the loopback you definitely have a GRE tunnel.
Hi everyone, I would like to thank you in advance for any help you can provide a newcomer like myself!
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