netdev - Re: mv88e6320: Failed to forward PTP multicast

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Message-ID: <CAOMZO5DXH1wS9YYPWXYr-TvM+9Tj8F0bY0_kd_EAjrcCpEJJ7A@mail.gmail.com>
Date: Thu, 4 May 2023 16:40:53 -0300
From: Fabio Estevam <festevam@...il.com>
To: Andrew Lunn <andrew@...n.ch>
Cc: Vladimir Oltean <olteanv@...il.com>, Florian Fainelli <f.fainelli@...il.com>, 
	Steffen Bätz <steffen@...osonix.de>, 
	netdev <netdev@...r.kernel.org>
Subject: Re: mv88e6320: Failed to forward PTP multicast

Hi Andrew,

On Thu, May 4, 2023 at 4:21 PM Andrew Lunn <andrew@...n.ch> wrote:

> Do you see the PTP traffic on eth1?

Yes, PTP traffic is seen on eth1.

> What MAC address is the PTP traffic using? Is it a link local MAC
> address? There are some range of MAC addresses which you are not
> supposed to forward across a bridge. e.g. you don't forward BPDUs.
> Take a look at br_handle_frame(). Maybe you can play with
> group_fwd_mask.

In our case, it is a multicast MAC.

The same traffic flows correctly when the bridge is not VLAN aware.

After VLAN is activated:

# Activate VLAN filtering
ip link set dev br0 type bridge vlan_filtering 1

Then the flow stops.

Thanks