Tunnel interface question

[frelaxx]

I have a router that is multihomed between two ISP's, I am looking at the tunnel interfaces and I see a line "tunnel key 1" with no reference to what the key is. See Example:

interface Tunnel1
ip unnumbered FastEthernet0/1
ip policy route-map policy1
tunnel source XX.XX.XX.XX
tunnel destination XX.XX.XX.XX
tunnel key 1

There are two more successive tunnel interfaces with tunnel key 2 & 3 respectively. Are these keys underlying and therefore do not appear in the running-config or are they just sequence numbers? Or are they something completely different?

Thanks for any assistance.....

 

[jneiberger]

Apparently, that's just a numeric plaintext password.