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About the GRE Tunnel

nawas
Level 4
Level 4

‎03-02-2010 01:46 PM - last edited on ‎03-25-2019 04:09 PM by Community Manager

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.

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Leo Laohoo
Hall of Fame
Hall of Fame

‎03-02-2010 01:59 PM

It's true.

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nawas
Level 4
Level 4
In response to Leo Laohoo

‎03-02-2010 02:04 PM

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

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Leo Laohoo
Hall of Fame
Hall of Fame
In response to nawas

‎03-02-2010 02:18 PM

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?

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