ipsec VTI ip address

[Graham Turner]

This is post re. the configuration of the tunnel interface for the purpose
of static VTI between two IOS hosts.

Just wanted to see what the issues were with the 'ip address' of the tunnel
interface

seems we have a number of options;

static ip address
ip unnumbered [loopback or other interface]
no ip address

are there are any pro's and con's of either, as it is just i recall some
issues with perhaps the use of 'ip unnumbered' in some instances ?

Thanks

[bod43]

If you want to route IP traffic across the link then you
will need an IP address.

Unless you have a good reason to do otherwise use
static IP address. If you use ip unnumbered there
are certain hop by hop troubleshooting strategies
that don't work. You can't ping individual interfaces.