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Date:      Thu, 20 Jan 2000 10:32:39 -0500 (EST)
From:      "Jasper O'Malley" <jooji@nickelkid.com>
To:        Mikel <mikel@ocsny.com>
Cc:        Richard Martin <dmartin@origen.com>, freebsd-net@FreeBSD.ORG
Subject:   Re: Virtual IPs & rc.conf
Message-ID:  <Pine.BSF.4.21.0001201026130.10736-100000@cornflake.nickelkid.com>
In-Reply-To: <3885FB5A.5DAE854C@ocsny.com>

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On Wed, 19 Jan 2000, Mikel wrote:

> excerpt from my rc.conf:
> #rjpcopycenter.com had to add these comments in for my sanity...this file has 50
> 0r 60 aliases...;(
> ifconfig_xl0_alias1="inet 208.239.172.2 netmask 0xffffff00"

Aliases should have /32 netmasks (0xFFFFFFFF) if they're in the same
subnet as the primary address on the interface. If they're not, the first
alias should have the netmask of the subnet to which it belongs (in case
you're running two subnets on the same wire), and additional aliases
should have /32 netmasks. If you're putting all your aliases into
their own subnet, though (i.e. no other physical nodes on the network
exist in the same subnet, the subnet for the aliases is exclusively for
a large number of aliases on a single machine), you might alias them to
the lo0 adapter instead of xl0, and have your routers direct traffic for
that subnet to the address on xl0.

> excerpt from my rc.local:
> route add -host 204.107.76.110 -interface xl0
> route add -host 208.239.172.2 -interface xl0
> route add -host 208.239.172.3 -interface xl0
> route add -host 208.239.172.4 -interface xl0
> route add -host 208.239.172.5 -interface xl0

This is unnecessary in my experience.

Cheers,
Mick



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