From: Paolo Abeni <pabeni@redhat.com>
To: Felix Fietkau <nbd@nbd.name>, netdev@vger.kernel.org
Subject: Re: [PATCH net-next] net: bridge: do not send arp replies if src and target hw addr is the same
Date: Tue, 09 Jan 2024 12:36:06 +0100 [thread overview]
Message-ID: <6b43ec63a2bbb91e78f7ea7954f6d5148a33df00.camel@redhat.com> (raw)
In-Reply-To: <20240104142501.81092-1-nbd@nbd.name>
On Thu, 2024-01-04 at 15:25 +0100, Felix Fietkau wrote:
> There are broken devices in the wild that handle duplicate IP address
> detection by sending out ARP requests for the IP that they received from a
> DHCP server and refuse the address if they get a reply.
> When proxyarp is enabled, they would go into a loop of requesting an address
> and then NAKing it again.
Can you instead provide the same functionality with some nft/tc
ingress/ebpf filter?
I feel uneasy to hard code this kind of policy, even if it looks
sensible. I suspect it could break some other currently working weird
device behavior.
Otherwise it could be nice provide some arpfilter flag to
enable/disable this kind filtering.
Cheers,
Paolo
next prev parent reply other threads:[~2024-01-09 11:36 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-01-04 14:25 [PATCH net-next] net: bridge: do not send arp replies if src and target hw addr is the same Felix Fietkau
2024-01-09 11:36 ` Paolo Abeni [this message]
2024-01-09 11:58 ` Felix Fietkau
2024-01-09 12:02 ` Nikolay Aleksandrov
2024-01-09 12:41 ` Felix Fietkau
2024-01-09 12:14 ` Paolo Abeni
2024-01-09 12:18 ` Nikolay Aleksandrov
2024-01-09 12:49 ` Dave Taht
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