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Date:      Tue, 15 Dec 1998 09:29:48 +1100
From:      Kevin Sheehan <kevin@planb.net.au>
To:        Dan <dan@falken.netmetrics.net>, "'Lew Payne'" <lewiz@netcom.com>
Cc:        "freebsd-questions@FreeBSD.ORG" <freebsd-questions@FreeBSD.ORG>
Subject:   RE: Strange Network Problem
Message-ID:  <01BE280D.76F4E780@fossil.planb.com.au>

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>> 2) What is the proper netmask for aliased IPs? I have found reasonably
>> authoritative references to both 255.255.255.255 and 255.255.255.254 in
>> the archives. I would like to clear this up.
>
>Huh?  The proper netmask to use is the netmask which accurately
>represents the address block you've been assigned.  You must ASK
>what the actual address block is that those other IP's came from,
>and set your netmask accordingly.  Setting an arbitrary netmask
>is an invitation to disaster.  The broadcast address, computed
>from your netmask, MAY BE ALREADY ASSIGNED TO ANOTHER MACHINE.

A mask of 255.255.255.255 is not so bad for an alias.

Rgs.


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