doc: ceph-osd binds to up to 4 ports, not 3

Signed-off-by: Sage Weil <sage@redhat.com>

diff --git a/doc/rados/configuration/network-config-ref.rst b/doc/rados/configuration/network-config-ref.rst
index b07777bcb5c90fe2eeefc5fdb8f56e517a201ece..b7b6baa4e5e2e0f60578c290855e0c2278190a00 100644 (file)
--- a/doc/rados/configuration/network-config-ref.rst
+++ b/doc/rados/configuration/network-config-ref.rst
@@ -124,26 +124,22 @@ By default, Ceph OSD Daemons `bind`_ to the first available ports on a Ceph Node
 beginning at port 6800.  Note that this behavior is not deterministic, so if you
 are running more than one OSD or MDS on the same host, or if you restart the
 daemons within a short window of time, the daemons will bind to higher ports.
-Each Ceph OSD Daemon on a Ceph Node may use up to three ports:
+Each Ceph OSD Daemon on a Ceph Node may use up to four ports:
 
 #. One for talking to clients and monitors.
 #. One for sending data to other OSDs.
-#. One for heartbeating.
+#. Two for heartbeating on each interface.
 
 .. ditaa:: 
               /---------------\
               |      OSD      |
-              |           +---+----------------+
-              |           | Clients & Monitors |
-              |           +---+----------------+
+              |           +---+----------------+-----------+
+              |           | Clients & Monitors | Heartbeat |
+              |           +---+----------------+-----------+
               |               |
-              |           +---+----------------+
-              |           | Data Replication   |
-              |           +---+----------------+
-              |               |
-              |           +---+----------------+
-              |           | Heartbeat          |
-              |           +---+----------------+
+              |           +---+----------------+-----------+
+              |           | Data Replication   | Heartbeat |
+              |           +---+----------------+-----------+
               | cCCC          |
               \---------------/