North American Network Operators Group
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Re: Quick question about secondary addresses

  • From: Jesper Skriver
  • Date: Sat Jul 31 10:59:19 2004 
On Fri, Jul 30, 2004 at 10:21:06AM -0700, Dan Lockwood wrote:

> I'm in a debate with a guy over the use of 'ip address x.x.x.x s.s.s.s
> secondary' on Cisco gear.  I seem to remember reading that the use of
> secondary addresses is a bad idea, but I can't recall the details of
> why.  Process switched?

No, traffic to hosts within a subnet configured as secondaries
will be CEF switched.

The only "bad" thing I can think of with secondaries, is that it's often
not what you want, why not split it on layer 2 as well, and get the
benefit of a smaller broadcast domain ?

> Can anyone offer a resource or more specific information?

/Jesper