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Date: Sun, 6 Mar 2022 21:27:13 +0100 From: Andrew Lunn <andrew@...n.ch> To: Vladimir Oltean <vladimir.oltean@....com> Cc: Tobias Waldekranz <tobias@...dekranz.com>, netdev <netdev@...r.kernel.org>, "emeric.dupont@....aero" <emeric.dupont@....aero> Subject: Re: Regression with improved multi chip isolation > This example of injecting traffic through br0.11 is interesting because > I think that Tobias' patch merely exposes a shortcoming of tag_dsa.c. > The tagger should inject packets into the switch in VLAN 4095 > (MV88E6XXX_VID_BRIDGED), because the ports offload a VLAN-unaware bridge. > Yet my guess is that it probably does so in VID 11 - this can be seen > using tcpdump and analyzing the DSA header. 20:25:42.239330 5a:e0:ae:a2:f6:db (oui Unknown) > Broadcast, ethertype MEDSA (0xdada), length 50: Forward, tagged, dev.port:vlan 3.0:11, pri 0: ethertype ARP (0x0806) Request who-has 10.42.11.2 tell 10.42.11.1, length 28 20:25:43.279670 5a:e0:ae:a2:f6:db (oui Unknown) > Broadcast, ethertype MEDSA (0xdada), length 50: Forward, tagged, dev.port:vlan 3.0:11, pri 0: ethertype ARP (0x0806) Request who-has 10.42.11.2 tell 10.42.11.1, length 28 20:25:44.319299 5a:e0:ae:a2:f6:db (oui Unknown) > Broadcast, ethertype MEDSA (0xdada), length 50: Forward, tagged, dev.port:vlan 3.0:11, pri 0: ethertype ARP (0x0806) Request who-has 10.42.11.2 tell 10.42.11.1, length 28 20:25:45.359288 5a:e0:ae:a2:f6:db (oui Unknown) > Broadcast, ethertype MEDSA (0xdada), length 50: Forward, tagged, dev.port:vlan 3.0:11, pri 0: ethertype ARP (0x0806) Request who-has 10.42.11.2 tell 10.42.11.1, length 28 Andrew
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