From: Ido Schimmel <idosch@nvidia.com>
To: Jack Ma <jack4it@gmail.com>
Cc: netdev@vger.kernel.org, David Ahern <dsahern@kernel.org>,
Stephen Hemminger <stephen@networkplumber.org>,
Jakub Kicinski <kuba@kernel.org>
Subject: Re: [PATCH iproute2-next v2 2/2] ip nexthop: support fdb destination port
Date: Thu, 23 Jul 2026 10:49:52 +0300 [thread overview]
Message-ID: <20260723074952.GD3189375@shredder> (raw)
In-Reply-To: <20260723-b4-vxlan-fdb-port-iproute2-v2-2-9012ac01b49e@gmail.com>
On Thu, Jul 23, 2026 at 01:25:08AM +0000, Jack Ma wrote:
> The kernel gained NHA_DST_PORT, an optional per-nexthop UDP destination
> port for fdb nexthops. VXLAN uses it to reach several receivers that
> share an underlay IP but listen on different ports, load-balancing a
> flow across (IP, port) legs of one nexthop group.
>
> Wire it into `ip nexthop`:
>
> ip nexthop add id 1 via 192.0.2.1 fdb dst_port 4790
>
> The port is parsed on add (sent as NHA_DST_PORT, __be16, network order)
> and printed back on dump/get. The kernel only accepts it together with
> fdb and a gateway.
>
> Signed-off-by: Jack Ma <jack4it@gmail.com>
Reviewed-by: Ido Schimmel <idosch@nvidia.com>
prev parent reply other threads:[~2026-07-23 7:50 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-07-23 1:25 [PATCH iproute2-next v2 0/2] ip nexthop: support fdb destination port Jack Ma
2026-07-23 1:25 ` [PATCH iproute2-next v2 1/2] uapi: add NHA_DST_PORT Jack Ma
2026-07-23 1:25 ` [PATCH iproute2-next v2 2/2] ip nexthop: support fdb destination port Jack Ma
2026-07-23 7:49 ` Ido Schimmel [this message]
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