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Date: Sat, 31 Jan 2009 13:33:54 -0800
From: Andrew Thompson <thompsa@FreeBSD.org>
To: Mike Tancsa <mike@sentex.net>
Message-ID: <20090131213354.GA29777@citylink.fud.org.nz>
References: <200901271739.n0RHdGd3047497@lava.sentex.ca>
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Cc: freebsd-net@freebsd.org
Subject: Re: lagg failover mode and vlans
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On Tue, Jan 27, 2009 at 12:39:26PM -0500, Mike Tancsa wrote:
...
> 
> but if I create some vlan interfaces off lagg0
> 
> lagg0.100: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> metric 0 mtu 1500
>         options=3<RXCSUM,TXCSUM>
>         ether 00:30:48:90:4c:fe
>         inet 192.168.100.1 netmask 0xffffff00 broadcast 192.168.100.255
>         media: Ethernet autoselect
>         status: active
>         vlan: 100 parent interface: lagg0
> lagg0.102: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> metric 0 mtu 1500
>         options=3<RXCSUM,TXCSUM>
>         ether 00:30:48:90:4c:fe
>         inet 192.168.102.1 netmask 0xffffff00 broadcast 192.168.102.255
>         media: Ethernet autoselect
>         status: active
>         vlan: 102 parent interface: lagg0
> 
> and do the same pulling of the cable, it does not work.  BUT, if I do an 
> arp -nda on a machine that is part of vlan102  which is doing the pinging 
> (so an arp-who has gets sent out and a reply answered), it works.  The 
> other option is if I send a packet out on the vlan's broadcast address from 
> the server

Can you verify that em2, em3 and all the lagg* interfaces have the same
mac address.

Andrew