[72943] in North American Network Operators' Group

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Re: Quick question about secondary addresses

daemon@ATHENA.MIT.EDU (Will Hargrave)
Tue Aug 3 06:13:06 2004

Date: Tue, 3 Aug 2004 11:12:29 +0100
From: Will Hargrave <will@harg.net>
To: nanog@nanog.org
In-Reply-To: <D87C1436D1DECB4A8FEB646F4FFDCE8601B7DA57@EXCHANGE08.shastalink.k12.ca.us>
Errors-To: owner-nanog-outgoing@merit.edu


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?  Can anyone offer a resource or more specific
> information?

One which hasn't been mentioned - DHCP will break horribly if the dhcp 
shared-subnets declarations don't match the multinetted subnets on the wire.


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