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Date:   Mon, 11 Apr 2022 10:13:44 -0600
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Subject: Re: [PATCH net-next v2] net/ipv6: Introduce accept_unsolicited_na
 knob to implement router-side changes for RFC9131
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To:     Arun Ajith S <aajith@arista.com>
Cc:     netdev@vger.kernel.org, davem@davemloft.net,
        linux-kernel@vger.kernel.org, linux-doc@vger.kernel.org,
        yoshfuji@linux-ipv6.org, kuba@kernel.org, pabeni@redhat.com,
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From:   David Ahern <dsahern@kernel.org>
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On 4/11/22 9:41 AM, Arun Ajith S wrote:
> 
> mausezahn doesn't have good support for ICMPv6.
> I tried using --type icmp6 -t icmp6 "type=136, payload=<HEX-PAYLOAD>"
> to manually craft a NA packet with  the target address and the target
> ll addr option.
> But it still doesn't allow me to set the flags to mark it as an
> unsolicited advertisement.
> 
> How about this alternative for a test:
> 1. Setup a veth tunnel across two namespaces, one end being the host
> and the other the router.
> 2. On the host side, I can configure
> net.ipv6.conf.<interface>.ndisc_notify to send out unsolicited NAs.
> 3. On the router side, I can try out various combinations of
> (accept_unsolicited_na, drop_unsolicted_na and forwarding)
> 

that works too. even simpler.