netdev - Re: [net-next v8 0/3] add broadcast_neighbor for no-stacking networking arch

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Message-Id: <9409D921-76FA-4A49-9E39-7F47DCB2B486@bamaicloud.com>
Date: Sun, 28 Sep 2025 12:11:49 +0800
From: Tonghao Zhang <tonghao@...aicloud.com>
To: Hangbin Liu <liuhangbin@...il.com>
Cc: netdev@...r.kernel.org,
 Jay Vosburgh <jv@...sburgh.net>,
 "David S. Miller" <davem@...emloft.net>,
 Eric Dumazet <edumazet@...gle.com>,
 Jakub Kicinski <kuba@...nel.org>,
 Paolo Abeni <pabeni@...hat.com>,
 Simon Horman <horms@...nel.org>,
 Jonathan Corbet <corbet@....net>,
 Andrew Lunn <andrew+netdev@...n.ch>,
 Steven Rostedt <rostedt@...dmis.org>,
 Masami Hiramatsu <mhiramat@...nel.org>,
 Mathieu Desnoyers <mathieu.desnoyers@...icios.com>,
 Nikolay Aleksandrov <razor@...ckwall.org>,
 Zengbing Tu <tuzengbing@...iglobal.com>,
 Liang Li <liali@...hat.com>
Subject: Re: [net-next v8 0/3] add broadcast_neighbor for no-stacking
 networking arch

> On Sep 24, 2025, at 10:23, Hangbin Liu <liuhangbin@...il.com> wrote:
> 
> On Fri, Jun 27, 2025 at 09:49:27PM +0800, Tonghao Zhang wrote:
>> For no-stacking networking arch, and enable the bond mode 4(lacp) in
>> datacenter, the switch require arp/nd packets as session synchronization.
>> More details please see patch.
> 
> Hi Tonghao,
> 
> Our engineer has a question about this feature. Since the switch requires
> ARP/ND packets for session synchronization, do we also need to send IGMP
> join/leave messages to the switch for synchronization?
Hello, I'm very sorry for replying to your question so late. In fact, the non-stacking network architecture disables the multicast function to prevent the server from learning other server real mac addresses. This architecture uses the arp proxy. To better answer your question, I post a blog:
https://huatuo.tech/blog/2025-09-26-some-thoughts-on-non-stacking-network-architecture/
> 
> Thanks
> Hangbin
>