From 6a02e2dc1789940721a47e7606660096fe04cfe3 Mon Sep 17 00:00:00 2001
From: Matthias Radestock <matthias.radestock@gmail.com>
Date: Tue, 23 Feb 2016 09:53:34 +0000
Subject: [PATCH] explain TCP/UDP connections, heartbeats, back-off

Fixes #1969
---
 site/troubleshooting.md | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/site/troubleshooting.md b/site/troubleshooting.md
index 23d3b9d1..c258651a 100644
--- a/site/troubleshooting.md
+++ b/site/troubleshooting.md
@@ -124,6 +124,13 @@ Proxy](proxy.html#troubleshooting).
 
 ### <a name="weave-status-connections"></a>List connections
 
+Connections between weave peers carry control traffic over TCP and
+data traffic over UDP. For a connection to be fully established, the
+TCP connection and UDP data path must be able to transmit information
+in both directions. Weave routers check this regularly with
+heartbeats. Failed connections are automatically retried, with an
+exponential back-off.
+
 Detailed information on the local weave router's connections can be
 obtained with `weave status connections`: