IPv6 GRE Tunneling

From: Nick Griffin (ngriffin@sio.midco.net)
Date: Mon Jan 23 2006 - 00:15:57 GMT-3

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Is there something that I'm missing on this configuration? I am unable
to get the tunnel interface to come up up using the "tunnel mode gre
ipv6", however if I change the type to "ipv6ip" it comes up right away.
Any thoughts appreciated.

R1
ipv6 unicast-routing
!
interface tunnel 0
 no ip address
 ipv6 address 2001:0DB8:1111:2222::1/64
 tunnel source Ethernet 0/0
 tunnel destination 10.0.0.1
 tunnel mode gre ipv6
!
interface Ethernet0/0
 ip address 10.0.0.2 255.255.255.0

R2
ipv6 unicast-routing
!
interface tunnel 0
 no ip address
 ipv6 address 2001:0DB8:1111:2222::2/64
 tunnel source Ethernet 0/0
 tunnel destination 10.0.0.2
 tunnel mode gre ipv6
!
interface Ethernet0/0
 ip address 10.0.0.1 255.255.255.0

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