Tunnel Management
For ICMP messages intermediate routers return 64 bits of the datagram beyond the IP header which is not enough to copy Inner header. So the encapsulator will not be able to relay the appropriate message to the original sender. But this can be handled by maintaining the soft state of the tunnel. The soft state information maintained by the tunnel includes the following:
- MTU of the tunnel
- TTL of the tunnel
- Reachability of the decapsulator
Read more about this topic: IP In IP
Famous quotes containing the words tunnel and/or management:
“You may raise enough money to tunnel a mountain, but you cannot raise money enough to hire a man who is minding his own business.”
—Henry David Thoreau (1817–1862)
“People have described me as a “management bishop” but I say to my critics, “Jesus was a management expert too.””
—George Carey (b. 1935)