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Date:   Mon, 12 Apr 2021 19:32:11 +0300
From:   Vladimir Oltean <olteanv@gmail.com>
To:     DENG Qingfang <dqfext@gmail.com>
Cc:     Marek Behun <marek.behun@nic.cz>,
        Ansuel Smith <ansuelsmth@gmail.com>, netdev@vger.kernel.org,
        "David S. Miller" <davem@davemloft.net>,
        Jakub Kicinski <kuba@kernel.org>, Andrew Lunn <andrew@lunn.ch>,
        Vivien Didelot <vivien.didelot@gmail.com>,
        Florian Fainelli <f.fainelli@gmail.com>,
        Alexei Starovoitov <ast@kernel.org>,
        Daniel Borkmann <daniel@iogearbox.net>,
        Andrii Nakryiko <andriin@fb.com>,
        Eric Dumazet <edumazet@google.com>,
        Wei Wang <weiwan@google.com>,
        Cong Wang <cong.wang@bytedance.com>,
        Taehee Yoo <ap420073@gmail.com>,
        =?utf-8?B?QmrDtnJuIFTDtnBlbA==?= <bjorn@kernel.org>,
        zhang kai <zhangkaiheb@126.com>,
        Weilong Chen <chenweilong@huawei.com>,
        Roopa Prabhu <roopa@cumulusnetworks.com>,
        Di Zhu <zhudi21@huawei.com>,
        Francis Laniel <laniel_francis@privacyrequired.com>,
        linux-kernel@vger.kernel.org
Subject: Re: [PATCH RFC net-next 0/3] Multi-CPU DSA support
Message-ID: <20210412163211.jrqtwwz2f7ftyli6@skbuf>
References: <20210410133454.4768-1-ansuelsmth@gmail.com>
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 <20210411185017.3xf7kxzzq2vefpwu@skbuf>
 <20210412150045.929508-1-dqfext@gmail.com>
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On Mon, Apr 12, 2021 at 11:00:45PM +0800, DENG Qingfang wrote:
> On Sun, Apr 11, 2021 at 09:50:17PM +0300, Vladimir Oltean wrote:
> >
> > So I'd be tempted to say 'tough luck' if all your ports are not up, and
> > the ones that are are assigned statically to the same CPU port. It's a
> > compromise between flexibility and simplicity, and I would go for
> > simplicity here. That's the most you can achieve with static assignment,
> > just put the CPU ports in a LAG if you want better dynamic load balancing
> > (for details read on below).
> >
>
> Many switches such as mv88e6xxx only support MAC DA/SA load balancing,
> which make it not ideal in router application (Router WAN <--> ISP BRAS
> traffic will always have the same DA/SA and thus use only one port).

Is this supposed to make a difference? Choose a better switch vendor!