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IPV6 Tunnelling
Just checking to see that I’ve got this straight in my head.
When a question has wording along the lines of:
Configure IPv6 tunnel over IPv4 network
We should use tunnel mode gre ?
From the follwoing debugs with tunnel mode ipv6ip I get the following: l13: IPv6/IP encapsulated 150.1.3.3->150.1.1.1 (linktype=79, len=92) *May 31 12:55:37.277: Tunnel13: IPv6/IP to classify 150.1.1.1->150.1.3.3(len=92 ttl=253 tos=0xE0) *May 31 12:55:37.277: Tunnel13: to decaps IPv6/IP packet 150.1.1.1-> 150.1.3.3 (len=92, ttl=253) *May 31 12:55:37.277: Tunnel13: decapsulated IPv6/IP packet
With tunnel mode gre I get the following: *May 31 12:58:11.573: Tunnel13: GRE/IP encapsulated 150.1.3.3->150.1.1.1(linktype=79, len=124) *May 31 12:58:11.609: Tunnel13: GRE/IP to classify 150.1.1.1->150.1.3.3(len=124 type=0×86DD ttl=253 tos=0×0)
Also using debug ip packet detail I’m seeing protocol 47 with GRE and protocol 41 when ipv6ip.
Firstly, am I correct to use mode gre and secondly any tips on what to look for in a question to decide the tunnel mode if it’s not stated? Thanks,
