IPv6 6to4 Tunnels

Configuring IPv6 6to4 Tunnels

Routing protocols aren’t possible with 6to4 tunnels only Static routes or BGP.

Step 1) Calculate the addressing required.

6to4 tunnels use a special address space 2002 followed by the address of the v4 address converted to hex

So a v4 address of would be 2002:C0A8:01EB::/128

Step 2) Configure the tunnel

R1(config)#int tunnel 1
R1(config-if)#ipv6 address 2002:C0A8:01EB::/128
R1(config-if)#tunnel source
R1(config-if)#tunnel mode ipv6ip 6to4

Step 3) Create static routes to the tunnel for the 2002::/16 network and for any other network reachable via the tunnel

R1(config)#ipv6 route 2002::/16 tunnel 1
R1(config)#ipv6 route ::/0 2002:C0A8:02EC::

This creates a default route to the other tunnel end point 2002:C0A8:02EC:: (


About ccie4all
Hello, and welcome to the first post of my CCIE blog This blog has got one simple goal and that is to improve our skills in Cisco Networking field so we can become best engineers on a job market. Wordpress Blog https://ccie4all.wordpress.com/ information about the changes made to Gns3 BGP , MPLS and R&S CCIE labs. In order to access and download all provided materials and receive important updates from Gns3 BGP , MPLS and R&S CCIE labs under GNS3 tab in the main header please go ahead and subscribe to https://ccie4all.wordpress.com/ ! All other posts have not been affected and can be accessed at any given time. Enjoy ! Tom

Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out /  Change )

Google photo

You are commenting using your Google account. Log Out /  Change )

Twitter picture

You are commenting using your Twitter account. Log Out /  Change )

Facebook photo

You are commenting using your Facebook account. Log Out /  Change )

Connecting to %s

%d bloggers like this: