.BR 9m ).
Relevant only locally, other end need not agree on it.
.TP
+.B mark
+sets an XFRM mark of the form <value>[/<mask>] in the inbound and outbound
+IPsec SAs and policies (IKEv2 only). If the mask is missing then a default
+mask of
+.B 0xffffffff
+is assumed.
+.TP
+.B mark_in
+sets an XFRM mark of the form <value>[/<mask>] in the inbound IPsec SA and policy
+(IKEv2 only). If the mask is missing then a default mask of
+.B 0xffffffff
+is assumed.
+.TP
+.B mark_out
+sets an XFRM mark of the form <value>[/<mask>] in the outbound IPsec SA and policy
+(IKEv2 only). If the mask is missing then a default mask of
+.B 0xffffffff
+is assumed.
+.TP
.B mobike
enables the IKEv2 MOBIKE protocol defined by RFC 4555. Accepted values are
.B yes