From: Tobias Waldekranz <tobias@waldekranz.com>
To: Andrew Lunn <andrew@lunn.ch>
Cc: netdev <netdev@vger.kernel.org>,
Vladimir Oltean <vladimir.oltean@nxp.com>,
emeric.dupont@zii.aero
Subject: Re: Regression with improved multi chip isolation
Date: Mon, 07 Mar 2022 10:21:28 +0100 [thread overview]
Message-ID: <87cziynmnb.fsf@waldekranz.com> (raw)
In-Reply-To: <YiUIQupDTGwgHE4K@lunn.ch>
On Sun, Mar 06, 2022 at 20:15, Andrew Lunn <andrew@lunn.ch> wrote:
> Hi Tobias
>
> I just found a regression with:
>
> d352b20f4174a6bd998992329b773ab513232880 is the first bad commit
> commit d352b20f4174a6bd998992329b773ab513232880
> Author: Tobias Waldekranz <tobias@waldekranz.com>
> Date: Thu Feb 3 11:16:56 2022 +0100
>
> net: dsa: mv88e6xxx: Improve multichip isolation of standalone ports
>
> Given that standalone ports are now configured to bypass the ATU and
> forward all frames towards the upstream port, extend the ATU bypass to
> multichip systems.
Sorry about that.
> I have a ZII devel B setup:
>
> brctl addbr br0
> brctl addif br0 lan0
> brctl addif br0 lan1
>
> ip link set br0 up
> ip link set lan0 up
> ip link set lan1 up
>
> ip link add link br0 name br0.11 type vlan id 11
> ip link set br0.11 up
> ip addr add 10.42.11.1/24 dev br0.11
>
> Has it happens, lan0 has link, and i run tcpdump on the link peer. lan1
> does not have link.
>
> I then ping 10.42.11.2.
>
> I found that the ARP Request who-has 10.42.11.2 tell 10.42.11.1 are
> getting dropped. I also see:
>
> p06_sw_in_filtered: 122
> p06_sw_out_filtered: 90
> p06_atu_member_violation: 0
> p06_atu_miss_violation: 0
> p06_atu_full_violation: 0
> p06_vtu_member_violation: 0
> p06_vtu_miss_violation: 121
>
> port 6 is the CPU port. Both p06_vtu_miss_violation and
> p06_sw_in_filtered are incrementing with each ARP Request broadcast
> from the host.
>
> The bridge should be vlan unaware, vlan_filtering is 0.
Huh, a VLAN upper without filtering enabled; didn't consider that
use-case...
Vladimir has already correctly diagnosed the problem. I'm working on a
fix right now, which I aim to send later today.
prev parent reply other threads:[~2022-03-07 9:23 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-03-06 19:15 Regression with improved multi chip isolation Andrew Lunn
2022-03-06 19:49 ` Vladimir Oltean
2022-03-06 20:27 ` Andrew Lunn
2022-03-07 9:21 ` Tobias Waldekranz [this message]
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