IPv6 Cisco Training: Using the? Source tunnel? Order
The most obvious reason why you¡¯re in the process of reading this article is because you¡¯re curious on how to create a ¡°tunnel¡± between two Cisco routers. Well, if that¡¯s the case you¡¯re headed in the right direction.
In this article, I¡¯m going to define the Cisco IOS interface configuration command named ¡°tunnel source¡± and also explain its usage.
So, on that note; let¡¯s begin. The first thing I need to tell you is that in order to use the ¡°tunnel source¡± command within an IPv6 network environment; your Cisco routers need to be running Cisco IOS 12.3(7)T or higher.
Network administrators (like you) use the ¡°tunnel source¡± interface configuration command, to set the source address for a tunnel interface.
Below is the proper syntax and example of using the command:
Syntax: tunnel source {ip-address | ipv6-address | interface-type interface-number}
ip-address -- Is the argument that represents the IPv4 address used as the source address for packets in the tunnel.
ipv6-address -- Is the argument that represents the IPv6 address used as the source address for packets in the tunnel.
interface-type -- Is the argument that represents the Interface type (example: fastethernet)
interface-number -- Is the argument that represents the port, connector, or interface card number.
Example:
router>enable
router#configure terminal
router(config)#interface tunnel 0
router(config-if)#ipv6 address 3ffe:b00:c21:1::56/127
router(config-if)#tunnel source fastethernet 0/0
router(config-if)#tunnel destination 192.168.20.1
router(config-if)#tunnel mode ipv6ip
In the example above, notice that the router¡¯s prompt is in ¡°interface configuration¡± mode when the ¡°tunnel source¡± command is being used; and the IPv4 address of the fastethernet 0/0 interface is being used as the source address for packets in the tunnel.
Now, if you need to remove the source address from a tunnel interface, use the word ¡°no¡± in front of the command like you see below:
router(config-if)#no tunnel source
I hope this article was very informative and helped you quickly understand the usage of the ¡°tunnel source¡± Interface configuration command. If you need to learn more; I suggest you visit my website, were you¡¯ll find the latest information regarding Cisco IPv6 Design and Implementation Techniques.
To your success,
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