Update Xconnect config

Change-Id: I5871406680f215902f232c960a763fb1c87df85f
diff --git a/configuration/xconnect.rst b/configuration/xconnect.rst
index 5bc5fc4..12f39da 100644
--- a/configuration/xconnect.rst
+++ b/configuration/xconnect.rst
@@ -1,13 +1,17 @@
 VLAN Cross Connect
 ==================
 
-VLAN cross connect creates a L2 bridge between two given ports on the same
-device.  Once configured, every packets arriving at one of the port with
-specific VLAN tag will be sent to another port directly.  Current
+VLAN cross connect creates a L2 bridge between two given endpoints on the same
+device.  Once configured, every packets arriving at one of the endpoints with
+specific VLAN tag will be sent to another endpoint directly.  Current
 implementation only matches on the outermost VLAN tag. If the packet is double
 tagged, the S-tag will be matched and both the S-tag and C-tag will be
 persisted.
 
+.. note::
+    An endpoint could be a physical port number or a logical port load balancer ID.
+    See examples below.
+
 VLAN cross connect only works on the same device.  If you are looking for
 transporting L2 traffic across devices, please refer to :doc:`pseoduwire
 <pseudowire>`
@@ -25,12 +29,16 @@
 
 .. code-block:: text
 
-   sr-xconnect-add <deviceId> <vlanId> <port1> <port2>
+   sr-xconnect-add <deviceId> <vlanId> <ep1> <ep2>
 
 - ``deviceId``: device ID, e.g. **of:0000000000000201**
 - ``vlanId``: VLAN ID, e.g. **94**
-- ``port1``: One end of the cross connect, e.g. **2**
-- ``port2``: Another end of the cross connect, e.g. **54**
+- ``ep1``: One end point of the cross connect.
+  Use integer to specify physical port number (e.g. **1**).
+  Use ``LB:<key>`` to specify port load balancer key (e.g. **LB:2**)
+- ``ep2``: Another end point of the cross connect.
+  Use integer to specify physical port number (e.g. **3**).
+  Use ``LB:<key>`` to specify port load balancer key (e.g. **LB:4**)
 
 Remove cross connect via CLI
 ----------------------------
@@ -57,12 +65,12 @@
    $ curl -X POST --header 'Content-Type: application/json' --header 'Accept: application/json' -d '{ \
      "deviceId": "of:0000000000000201", \
      "vlanId": "94", \
-     "ports": [ 1, 2 ] \
+     "endpoints": [ 1, 2 ] \
    }' 'http://${ONOS-IP}/onos/segmentrouting/xconnect'
 
 - ``deviceId``: device ID, e.g. **of:0000000000000201**
 - ``vlanId``: VLAN ID, e.g. **94**
-- ``ports``: endpoints of the cross connect, e.g. **[1, 2]**
+- ``endpoints``: endpoints of the cross connect, e.g. **[1, 2]**
 
 Remove cross connect via REST
 -----------------------------