[c-nsp] IP GRE tunnel up/down

Drew Weaver drew.weaver at thenap.com
Wed Jul 13 11:19:45 EDT 2011


Howdy,

I am trying to establish a GRE/IP tunnel over the Internet:

interface Tunnel1
description GRE-Tunnel
ip unnumbered GigabitEthernet7/0/0
no ip directed-broadcast
tunnel source Loopback1
tunnel destination x.x.x.x
end

Pretty much no matter what I do the interface status is always:

Tunnel1 is up, line protocol is down

I've read that tunnels should be up/up unless you are using keepalives and it detects a failure.

Does anyone have any insight they can share on this?

thanks,
-Drew




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