The Router Does Not Receive Traffic Through The Tunnel; The Router Does Not Receive Routing Updates - HP ProCurve Secure Router 7203 dl Advanced Management And Configuration Manual

Configuring a Tunnel with Generic Routing Encapsulation
Troubleshooting GRE Configuration
9-14
The Router Does Not Receive Traffic through the
Tunnel
Enter the show interfaces command and double-check the tunnel key. You
should check the IP routing table and determine whether any traffic is being
sent through the tunnel.
You can also try pinging the destination address of the tunnel to ensure that
the remote endpoint is reachable. The route table should include a route to
the tunnel destination through a WAN interface.

The Router Does Not Receive Routing Updates

If a router is not receiving routing updates, verify that you have enabled the
routing protocol on the tunnel interface. You must enable the protocol for the
network on which the tunnel has its IP address, not its source or destination
address.
When you configure a tunnel key on a tunnel interface, the interface's maxi-
mum transmission unit (MTU) may change. This change can prevent the router
from achieving full adjacency with its neighbor. You may need to reset the
MTU and the connection to the neighbor so that the router can receive OSPF
link state advertisements (LSAs) over the tunnel.
Refer to Chapter 13: IP Routing—Configuring RIP, OSPF, BGP, and PBR for
general information on troubleshooting dynamic routing.