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From: "Frank Behrens" <frank@pinky.sax.de>
To: freebsd-net@freebsd.org
Date: Fri, 09 Mar 2007 14:44:27 +0100
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Subject: Assign IP address to which interface when using if_bridge(4)?
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I see some problems with if_bridge(4) and want to investigate this further. But before I make 
further tests I want to be sure to have the right setup. I could not find any hints in the 
documentation including FreeBSD handbook.

I have an ethernet device xl0 and want to create a if_bridge(4) to tap(4):
ifconfig bridge0 create
ifconfig bridge0 addm xl0 addm tap0 up

Now I have 3 interfaces, to which of them should I assign the ip address? When searching 
for information I found both possibilities:

1. Assign the IP address to child interface (e.g. xl0) and use this also for routing setup.
2. Assign the address to bridge interface (bridge0) and use this as reference interface.

I assume 1. is the right solution, because the bridge0 does not even create link-local 
addresses. Am I right?

Regards,
   Frank
-- 
Frank Behrens, Osterwieck, Germany
PGP-key 0x5B7C47ED on public servers available.