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Using Tunnel interface on Router

mahesh18
Frequent Contributor
Frequent Contributor

Hi Everyone,

I see hew Tunnel  interface on Router.

Router is Running OSPF.

It has no crypto statemets.

tunnel configuration

interface Tunnel1

ip address 10.4.x.x x.x.x.x

delay 7

tunnel source Loopback1

tunnel destination 10.4.x.x

My question is when we use Tunnel interface without any crypto statemets?

Thanks

MAhesh

1 Accepted Solution

Accepted Solutions

Karsten Iwen
VIP Mentor VIP Mentor
VIP Mentor

This Tunnel is a plain GRE-Tunnel. These are typically used without crypto when:

1) The traffic is not sent through an untrusted network and a cryptographic protection is not needed.
2) The GRE-traffic gets encrypted on a separate device if the GRE-Endpoint is not capable of doing the needed cryptographic protection.


Sent from Cisco Technical Support iPad App

View solution in original post

3 Replies 3

Karsten Iwen
VIP Mentor VIP Mentor
VIP Mentor

This Tunnel is a plain GRE-Tunnel. These are typically used without crypto when:

1) The traffic is not sent through an untrusted network and a cryptographic protection is not needed.
2) The GRE-traffic gets encrypted on a separate device if the GRE-Endpoint is not capable of doing the needed cryptographic protection.


Sent from Cisco Technical Support iPad App

mahesh18
Frequent Contributor
Frequent Contributor

Hi Karsten,

Thanks for reply.

So you mean this is possible where we only need GRE tunnel on device and this device can communicate to other

end of tunnel and other device can do the IPSEC encryption right if needed?

Thanks

MAhesh

mahesh18
Frequent Contributor
Frequent Contributor

Hi Karsten,

Many thanks for reply back.

Regards

Mahesh

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