Loopback

[navneet_78]

Why do we sometimes use the Tunnel source as the loopback?

Thanks

Navneet

[sourabhagarwal · Accepted solution]

You cannot have two tunnels that use the same encapsulation mode with exactly the same source and destination address. The workaround is to create a loopback interface and source packets off the loopback interface.

Also, loopback interface is a virtual interface that is always up sessions to stay up even if the outbound interface is down.

hope it help ... rate if it does ....

[navneet_78]

Thnx for the response Sourabh

Cheers

Navneet

[network.king]

Hi

Using the loopback holds good for all having the same explanation , a interface always up and if your router having a tunnel has multiple interfaces for traffic to exit and having a loopback as source would make the tunnel to be up always.

If configured with any interfaces as source , and if interface down tunnel also down.But if your router is connected as a spoke , then it doesnt make any diff.

Hope this helps

regards

vanesh k

[gbenoit83]

Question about Loopback as the ip radius source interface.

I cannot get my loopback to be used to ssh into my router. I have set up a static route going to the next hop which is our core switch. If the ip radius source is set to an interface, it works with no issue. I have set the source as loopback, entered a static route and even disabled CoPP and still no success. 

Any suggestions?