On Mon, Oct 19, 2020 at 08:25:33PM +0800, Xin Long wrote: > --- a/Documentation/networking/ip-sysctl.rst > +++ b/Documentation/networking/ip-sysctl.rst > @@ -2640,6 +2640,12 @@ addr_scope_policy - INTEGER > > Default: 1 > > +udp_port - INTEGER Need to be more verbose here, and also mention the RFC. > + The listening port for the local UDP tunneling sock. , shared by all applications in the same net namespace. > + UDP encapsulation will be disabled when it's set to 0. "Note, however, that setting just this is not enough to actually use it. ..." > + > + Default: 9899 > + > encap_port - INTEGER > The default remote UDP encapsalution port. > When UDP tunneling is enabled, this global value is used to set When is it enabled, which conditions are needed? Maybe it can be explained only in the one above.