From: Andrew Lunn <andrew@lunn•ch>
To: Vivien Didelot <vivien.didelot@savoirfairelinux•com>
Cc: netdev <netdev@vger•kernel.org>,
Florian Fainelli <f.fainelli@gmail•com>,
Woojung.Huh@microchip•com, jbe@pengutronix•de,
sean.wang@mediatek•com, john@phrozen•org
Subject: Re: [PATCH v2 rfc 0/8] IGMP snooping for local traffic
Date: Wed, 6 Sep 2017 16:16:24 +0200 [thread overview]
Message-ID: <20170906141624.GE11864@lunn.ch> (raw)
In-Reply-To: <87y3pskk1p.fsf@weeman.i-did-not-set--mail-host-address--so-tickle-me>
> > What i found is that the Marvell chips don't flood broadcast frames
> > between bridged ports. What appears to happen is there is a fdb miss,
> > so it gets forwarded to the CPU port for the host to deal with. The
> > software bridge when floods it out all ports of the bridge.
>
> Do you have this issue on a single switch?
Yes. I have two boards with a single switch in my test setup. They
fail the broadcast tests in the same way as boards with multiple
switches.
> It should be done at the DSA level. DSA core must be the single entry
> point to handle all the switch logic, calling into (dumb) DSA drivers.
> If it is buried into a specific driver, we'll likely lose track of the
> problem and make it harder to maintain.
I think we need to wait and see what driver writers report their chips
are doing. If this is just a Marvell issue, we probably should fix it
in the Marvell driver only.
If i remember correctly, Woojung said he was seeing duplication of
broadcasts. So it could be the Microchip hardware is forwarding
broadcast in the hardware.
Andrew
next prev parent reply other threads:[~2017-09-06 14:16 UTC|newest]
Thread overview: 35+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-09-05 23:35 [PATCH v2 rfc 0/8] IGMP snooping for local traffic Andrew Lunn
2017-09-05 23:35 ` [PATCH v2 rfc 1/8] net: bridge: Rename mglist to host_joined Andrew Lunn
2017-09-05 23:35 ` [PATCH v2 rfc 2/8] net: bridge: Send notification when host join/leaves a group Andrew Lunn
2017-09-05 23:35 ` [PATCH v2 rfc 3/8] net: bridge: Add/del switchdev object on host join/leave Andrew Lunn
2017-09-05 23:35 ` [PATCH v2 rfc 4/8] net: dsa: slave: Handle switchdev host mdb add/del Andrew Lunn
2017-09-06 15:37 ` Vivien Didelot
2017-09-05 23:35 ` [PATCH v2 rfc 5/8] net: dsa: switch: handle host mdb add/remove Andrew Lunn
2017-09-05 23:35 ` [PATCH v2 rfc 6/8] net: dsa: switch: Don't add CPU port to an mdb by default Andrew Lunn
2017-09-05 23:35 ` [PATCH v2 rfc 7/8] net: dsa: set offload_fwd_mark on received packets Andrew Lunn
2017-09-05 23:35 ` [PATCH v2 rfc 8/8] net: dsa: Fix SWITCHDEV_ATTR_ID_PORT_PARENT_ID Andrew Lunn
2017-09-06 14:46 ` Vivien Didelot
2017-09-06 15:08 ` Andrew Lunn
2017-09-06 16:09 ` Florian Fainelli
2017-09-06 16:29 ` Andrew Lunn
2017-09-06 0:11 ` [PATCH v2 rfc 0/8] IGMP snooping for local traffic Stephen Hemminger
2017-09-06 9:52 ` Nikolay Aleksandrov
2017-09-06 0:47 ` Andrew Lunn
2017-09-06 13:56 ` Vivien Didelot
2017-09-06 14:16 ` Andrew Lunn [this message]
2017-09-06 14:27 ` John Crispin
2017-09-06 14:46 ` Matthias May
2017-09-06 15:16 ` Andrew Lunn
2017-09-06 15:27 ` Stephen Hemminger
2017-09-06 15:49 ` Woojung.Huh
2017-09-06 15:54 ` Roopa Prabhu
2017-09-06 16:06 ` Florian Fainelli
2017-09-06 16:42 ` Andrew Lunn
2017-09-06 19:54 ` Florian Fainelli
2017-09-06 23:44 ` Woojung.Huh
2017-09-07 0:43 ` Andrew Lunn
2017-09-07 0:47 ` Andrew Lunn
2017-09-06 14:29 ` Vivien Didelot
2017-09-06 15:25 ` Vivien Didelot
2017-09-06 17:01 ` Andrew Lunn
2017-09-06 18:29 ` Vivien Didelot
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