Hello,

I have a router terminating two tunnels, one is a regular IPsec tunnel, and one 
is a GRE tunnel with IPsec protection. Both tunnels work by themselves, but 
they cannot communicate with each other.

I remember reading somewhere that you cannot hairpin an IPsec tunnel to a DMVPN 
tunnel, and it would appear that applies to a regular GRE tunnel as well.

Both tunnels have peer/endpoint addresses on one VRF, with payload traffic on 
another.

Can anyone tell me if this limitation is documented anywhere, and if there's a 
workaround, other than to terminate the tunnels on 2 separate routers?

Platform ISR G2, IOS 15.1(4)M8

Thanks,
Scott


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