From: Josef Johansson <josef@oderland.se>
To: pve-devel@lists.proxmox.com
Subject: Re: [pve-devel] [PATCH pve-common 0/2] add disable bridge learning feature
Date: Thu, 11 Nov 2021 11:46:36 +0100 [thread overview]
Message-ID: <196c3dc5-f926-55a9-661c-e7b9146c7b27@oderland.se> (raw)
In-Reply-To: <179fb53f-5dff-8d3a-38b6-a392b9bcb581@proxmox.com>
On 11/11/21 11:40, Thomas Lamprecht wrote:
> On 24.09.21 10:48, Alexandre Derumier wrote:
>> Currently, if bridge receive an unknown dest mac (network bug/attack/..),
>> we are flooding packets to all bridge ports.
>>
>> This can waste cpu time, even more with firewall enabled.
>> Also, if firewall is used with reject action, the src mac of RST
>> packet is the original unknown dest mac.
>> (This can block the server at Hetzner for example)
>>
>> So, we can disable learning && unicast_flood on tap|veth|fwln port interface.
>> Then mac address need to be add statically in bridge fdb.
> I'm a bit out of the loop of the with the whole bad hetzner network thingy, is this still
> relevant as I'd see if I can get it in finally..
>
>
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>
Hi,
Is it not enough to turn off unicast_flood on fwpr*?
If I have unicast_flood on fwln some scenarios does not work.
I have been running it a while now and it seems to solve all odd quirks
we've had with the networking on PVE.
Regards
Josef
next prev parent reply other threads:[~2021-11-11 10:46 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-09-24 8:48 Alexandre Derumier
2021-09-24 8:48 ` [pve-devel] [PATCH pve-common 1/2] network: add support for disabling bridge learning on tap|veth|fwln ports Alexandre Derumier
2021-09-24 8:48 ` [pve-devel] [PATCH pve-common 2/2] Inotify: add bridge-disable-mac-learning option to bridges Alexandre Derumier
2021-11-11 10:40 ` [pve-devel] [PATCH pve-common 0/2] add disable bridge learning feature Thomas Lamprecht
2021-11-11 10:46 ` Josef Johansson [this message]
2021-11-11 18:38 ` DERUMIER, Alexandre
2022-03-16 16:33 ` [pve-devel] applied-series: " Thomas Lamprecht
2022-03-16 16:43 ` DERUMIER, Alexandre
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