I have a cisco 1801 that is the end point of a bunch of gre tunnels. I recently got my hands on a 7200 that we decided to change to instead. When i enter the config into the new 7200 everything seems fine but the tunnel wont go up. I have messed around with it a bit and found that this config works on a 1801 but not on my 7200 or a 2811 that i also tried.
I wonder if there is a command that comes standard on the 1801 that dont in my 7200/2811?
ip address 10.1.1.1 255.255.255.0
no ip redirects
ip nhrp map multicast dynamic
ip nhrp network-id 100
tunnel source Loopback1
tunnel mode gre multipoint
ip address 192.168.1.1 255.255.255.0
This config gives me up/up on the 1801 but not on the other two. None of the tree have anything connecting to it in my tests. It feels like some thing simple that im just missing to see.