cancel
Showing results for 
Search instead for 
Did you mean: 
cancel
627
Views
0
Helpful
3
Replies

About the GRE Tunnel

nawas
Level 4
Level 4

Is this a true Cisco statemenet?

GRE tunnel encapsulation and deencapsulation for multicast packets are handled by the hardware in PFC3. Each hardware-assisted tunnel must have a unique source. Hardware-assisted tunnels cannot share a source even if the destinations are different.

3 Replies 3

Leo Laohoo
Hall of Fame
Hall of Fame

It's true.

So the unique source address can be any pingable interface and don't have to be a loopback, is that correct?

In our case, we had two WAN links to our routers.  Tunnel 0 source is F0/0 (/30) and Tunnel 1 source is F0/1 (/30).

Does this make sense?

Getting Started

Find answers to your questions by entering keywords or phrases in the Search bar above. New here? Use these resources to familiarize yourself with the community: