@@ -135,6 +135,14 @@ established MPTCP sockets will be accepted on the specified port, regardless
the original listener port accepting the first MPTCP subflow and/or
this peer being actually on the client side.
+.TP
+.IR IFNAME
+is the network interface name attached to the endpoint. It is important to
+specify this device name linked to the address to make sure the system knows how
+to route packets from the specified IP address to the correct network interface.
+Without this, it might be required to add IP rules and routes to have the
+expected behavior.
+
.TP
.IR ID
is a unique numeric identifier for the given endpoint
It was missing, while it is a very important option. Indeed, without it, the kernel might not pick the right interface to send packets for additional subflows. Mention that in the man page. Signed-off-by: Matthieu Baerts (NGI0) <matttbe@kernel.org> --- man/man8/ip-mptcp.8 | 8 ++++++++ 1 file changed, 8 insertions(+)