[nsp] using /31s

Roger grunky at rockriver.net
Tue Feb 10 11:36:20 EST 2004

Mike Sawicki wrote:

>Jeff is right.  The only time I ever use /31's is to reference ip pairs 
>in filtering/acl applications.  This is really the only realm in
>which they are valid.  Try 'ip unnumbered' if you are getting
>desperate for space.
The problem w/

'ip unnumbered'

Is that you now depend on another interface being up.  Granted the other 
interface is usually a ethernet interface which is pretty reliable, you 
open yourself up to one more point of failure.

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