From: Jeff Mitchell <jmitchell@ll.mit.edu>
To: bridge@lists.linux-foundation.org
Subject: Re: [Bridge] What are actually ethernet devices (and what does a bridge do?).
Date: Wed, 30 Jun 2010 10:22:22 -0400 [thread overview]
Message-ID: <4C2B531E.4010308@ll.mit.edu> (raw)
In-Reply-To: <AANLkTil_htjsbpP4oz318heSGIU-1_Atrcgx9uLoOjpR@mail.gmail.com>
On 06/30/2010 05:37 AM, Stef Bon wrote:
> Now what strikes me first is that in a lot of cases a bridge is
> getting an ip address, which is (I think) not right.
> An bridge connects connects devices, and these devices should get the
> ip address, not the bridge self!
It depends what you're trying to do.
Giving the bridge an IP address can allow you to do some things that
might otherwise be difficult, by allowing you to do interesting things
to the underlying interfaces and the bridge itself.
For instance, you could do this to receive packets destined for that IP
address on any interface in the bridge.
Another use would be to ensure (by setting the ageing to zero) that any
packet sent from your IP address goes out all of the interfaces. This is
useful for mirroring/sniffing setups.
--Jeff
prev parent reply other threads:[~2010-06-30 14:22 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-06-30 9:37 [Bridge] What are actually ethernet devices (and what does a bridge do?) Stef Bon
2010-06-30 14:15 ` richardvoigt
2010-06-30 20:26 ` Stef Bon
2010-06-30 20:37 ` Jeff Mitchell
2010-06-30 21:32 ` Stef Bon
2010-06-30 21:51 ` Sergei Zhirikov
2010-06-30 14:22 ` Jeff Mitchell [this message]
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