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From: =?iso-8859-1?Q?VELARTIS_Philipp_D=FCrhammer?=
To: 'Proxmox VE development discussion'
Thread-Topic: BUG in vlan aware bridge
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Date: Tue, 12 Oct 2021 10:48:22 +0000
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Subject: [pve-devel] BUG in vlan aware bridge
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HI,
i am playing around since days because we have strange packet losses.
Finally I can report following (Linux 5.11.22-4-pve, Proxmox 7, all devices=
MTU 1500):
Packet with sizes > 1500 without VLAN working well but at the moment they a=
re Tagged they are dropped by the bond device.
Netfilter (set to 1) always reassembles the packets when they arrive a brid=
ge. But they don't get fragmented again I they are VLAN tagged. So the bond=
device drops them. If the bridge is NOT Vlan aware they also get fragmente=
d and it works well.
Setup not working:
tapX (tagged) <- -> vmbr0 <- - > bond0
Setup working:
tapX (tagged) <- -> vmbr0 <- - > bond0
Setup also working:
tapX < - - > vmbr0v350 < -- > bond0.350 < -- > bond0
Have you got any idea where to search? I don't understand who is in charge =
of fragmenting packages again if they get reassembled by netfilter. (and wh=
y it is not working with vlan aware bridges)