Date: Mon, 13 Mar 2006 01:11:05 -0500
From: Chuck Ebbert <76306.1226@compuserve.com>
Subject: Re: Router stops routing after changing MAC Address
To: Greg Scott <GregScott@InfraSupportEtc.com>
Cc: linux-kernel <linux-kernel@vger.kernel.org>,
       "David S. Miller" <davem@davemloft.net>
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In-Reply-To: <925A849792280C4E80C5461017A4B8A20321CC@mail733.InfraSupportEtc.com>

On Fri, 10 Mar 2006 18:33:15 -0600, Greg Scott wrote:

> How to change MAC addresses is documented well enough - and it works -
> but when I change MAC addresses, my router stops routing.  From the
> router, I can see the systems on both sides - but the router just
> refuses to forward packets.  Here are my little test scripts to change
> MAC Addresses.
> 
> First - ip-fudge-mac.sh
> [root@test-fw2 gregs]# more ip-fudge-mac.sh
> ip link set eth0 down
> ip link set eth0 address 01:02:03:04:05:06
                            ^
 Bit zero is set, so this is a multicast address.  Is that intentional?

> ip link set eth0 up
> 
> ip link set eth1 down
> ip link set eth1 address 17:20:16:01:60:03
                            ^
 Ditto.

> ip link set eth1 up
> 
> echo "1" > /proc/sys/net/ipv4/ip_forward


-- 
Chuck
"Penguins don't come from next door, they come from the Antarctic!"

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