loopback or another interface (usually a static route of last resort
to the loopback address/interface).
loopback or null?
In the "old" days, null was handled by CPU (software switched), so lots
of us old-timers got into the habit of using loopback instead of null.
On a modern platform it should make no operational difference provided
you have everything you need set up properly. (null routing the /16, for
example, might be bad if you ever actually try to route that whole
prefix instead of just subs -- as it would be specific and static).
Deepak Jain
AiNET
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