GRE Tunneling for ipv6

From: nhatphuc (nhatphuc@gmail.com)
Date: Thu Feb 22 2007 - 11:00:47 ART

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Hi GS,

In Cisco Press Self-Study Implementing IPv6 Network book, there's a scenario
deploying ipv6 over gre tunnel.

Cisco uses the following configuration:

RouterR1#configure terminal
RouterR1(config)#int tunnel0
RouterR1(config-if)#ipv6 address 3ffe:b00:ffff:2::1/64
RouterR1(config-if)#tunnel source 206.123.31.200
RouterR1(config-if)#tunnel destination 132.214.1.10
RouterR1(config-if)#tunnel mode gre ipv6
RouterR2(config-if)#exit

I think command "tunnel mode gre ipv6" is used when tunneling is created
over ipv6 network

If so the correct configuration should be:

1. change tunnel source and destination addresses to ipv6 address
or
2. change mode to "tunnel mode gre" (this is default on int tunnel)

Am I correct?

Thanks

Phuc

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