[101501] in North American Network Operators' Group
Re: Using x.x.x.0 and x.x.x.255 host addresses in supernets.
daemon@ATHENA.MIT.EDU (Jon Lewis)
Tue Jan 8 09:52:22 2008
Date: Tue, 8 Jan 2008 09:50:13 -0500 (EST)
From: Jon Lewis <jlewis@lewis.org>
To: Joe Provo <nanog-post@rsuc.gweep.net>
cc: nanog@merit.edu
In-Reply-To: <20080108141842.GA16325@gweep.net>
Errors-To: owner-nanog@merit.edu
On Tue, 8 Jan 2008, Joe Provo wrote:
> Yes. Efficient address utilization is a Good Thing.
>
>> I realize that technically they are valid addresses, but does anyone
>> assign a node or server which is a member of a /22 with a x.x.x.0
>> and x.x.x.255?
>
> Great for router interfaces, loops, etc where you don't care that
> broken or archaic systems cannot reach them, and where the humans
> interacting with them should have no issues.
Until you assign a .255/32 to a router loopback interface and then find
that you can't get to it because some silly router between you and it
thinks '.255? that's a broadcast address.'
Been there...had to change the loopback IP.
----------------------------------------------------------------------
Jon Lewis | I route
Senior Network Engineer | therefore you are
Atlantic Net |
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