netdev - Problem with GVRP on eth while having a bridge

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Message-ID: <51138866.8000802@profihost.ag>
Date:	Thu, 07 Feb 2013 11:56:38 +0100
From:	Stefan Priebe - Profihost AG <s.priebe@...fihost.ag>
To:	Linux Netdev List <netdev@...r.kernel.org>
CC:	kaber@...sh.net, David Miller <davem@...emloft.net>,
	LKML <linux-kernel@...r.kernel.org>,
	Alexandre DERUMIER <aderumier@...so.com>
Subject: Problem with GVRP on eth while having a bridge

Hello list,

this was tested using vanilla 3.7.6 kernel.

When i add a vlan to an ethernet device supporting gvrp everything is
fine until this ethernet device also had a bridge.

This works fine as long as eth1 is not attached to a bridge.

# ip link add link eth1 name eth1.99 type vlan id 99 gvrp on
# ip link set eth1.99 up

The dynamic VLAN stays up at the switch - no problems.

If eth1 has a bridge the dynamic vlan is created at the switch so the
initial packet was send but it disappears after a few seconds.

Wireshark shows that the kernel has stopped sending GVRP packets. After
adding a bridge to eth1.

Greets,
Stefan

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