maybe it’s not revelant, but this patch provides more explanations about the output of “show summary”.
RCS file: /cvs/src/usr.sbin/bgpctl/bgpctl.8,v
retrieving revision 1.67
diff -u -p -u -r1.67 bgpctl.8
--- bgpctl.8 25 Oct 2015 13:08:29 -0000 1.67
+++ bgpctl.8 22 May 2016 16:05:13 -0000
@@ -364,7 +364,24 @@ Multiple options can be used at the same
filter can be combined with other filters.
.It Cm show summary
Show a list of all neighbors, including information about the session state
-and message counters.
+and message counters:
+.Bl -tag -width xxxxxxxxxxxxxx -compact
+Description of the neighbor.
+Autonomous system number.
+Number of messages received from the neighbor since the session was established.
+Number of messages sent to the neighbor since the session was established.
+Number of outgoing messages queued.
+Number of days and hours that the session has been up.
+State of the session / Number of routes received. The session is up if there is no information for the State column (Established is not displayed).
.It Cm show summary terse
Show a list of all neighbors, including information about the session state,
in a terse format.