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Date: Tue, 27 Aug 1996 06:19:56 -0500 (CDT)
From: Mike <flaq@synwork.com>
To: satan@yoss.canweb.net
cc: questions@FreeBSD.org
Subject: Re: having trouble with ip aliasing
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On Tue, 27 Aug 1996 satan@yoss.canweb.net wrote:

> 
> Hi! 
> I am having trouble configuring my server for virtual ips.
> Its 'main' ip is 152.160.182.16 (ifconfig)
> I do the following
> 
> ifconfig ed0 inet 152.160.5.1 alias 
> route add -host 152.160.5.1 localhost
> 
> The route command fails with 'file exists' error, and I cant ping
> the server on 152.160.5.1, even from a local machine (same LAN).
> Now, I have no problem aliasing to ips on same subnet, ie., 
> aliasing to 152.160.182.224, for example.  So I suspect this is a 
> problem with netmask on ifconfig, but I cant figure out what it 
> should be.
> 
> Thanks,
> 
> --Stan
> 

For an IP alias, I use:

ifconfig ed0 xxx.xxx.xxx.xxx netmask 255.255.255.255 alias

I don't think you should have to add a route.

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