man: ip-neighbour.8: Document all known nud states

Not sure how useful they are in practice, but as 'ip neigh' supports
setting them all, they deserve to be described as well.

While at it, also add a missing layer of indentation to the subordinate
nud state list.

Signed-off-by: Phil Sutter <phil@nwl.cc>

diff --git a/man/man8/ip-neighbour.8 b/man/man8/ip-neighbour.8
index 19c6d9d8bf605a7e1050703b66105acb4e41b597..b292e181449501fd33a23abbca7abe1d796ea00b 100644 (file)
--- a/man/man8/ip-neighbour.8
+++ b/man/man8/ip-neighbour.8
@@ -35,7 +35,8 @@ ip-neighbour \- neighbour/arp tables management.
 
 .ti -8
 .IR STATE " := {"
-.BR permanent " | " noarp " | " stale " | " reachable " }"
+.BR permanent " | " noarp " | " stale " | " reachable " | " none " |"
+.BR incomplete " | " delay " | " probe " | " failed " }"
 
 .SH DESCRIPTION
 The
@@ -86,6 +87,7 @@ the state of the neighbour entry.
 is an abbreviation for 'Neighbour Unreachability Detection'.
 The state can take one of the following values:
 
+.RS
 .TP
 .B permanent
 the neighbour entry is valid forever and can be only
@@ -105,6 +107,24 @@ This option to
 .B ip neigh
 does not change the neighbour state if it was valid and the address
 is not changed by this command.
+.TP
+.B none
+this is a pseudo state used when initially creating a neighbour entry or after
+trying to remove it before it becomes free to do so.
+.TP
+.B incomplete
+the neighbour entry has not (yet) been validated/resolved.
+.TP
+.B delay
+neighbor entry validation is currently delayed.
+.TP
+.B probe
+neighbor is being probed.
+.TP
+.B failed
+max number of probes exceeded without success, neighbor validation has
+ultimately failed.
+.RE
 .RE
 
 .TP