[#3084] Minor update to ARM

modified:   hooks-ping-check.rst

diff --git a/doc/sphinx/arm/hooks-ping-check.rst b/doc/sphinx/arm/hooks-ping-check.rst
index e327a4ccafa2a1439363a0c07e544598062f3c35..962fd7174e1922ad16449ba482c379195e8f1814 100644 (file)
--- a/doc/sphinx/arm/hooks-ping-check.rst
+++ b/doc/sphinx/arm/hooks-ping-check.rst
@@ -93,8 +93,10 @@ return to step 1.
 4. Any of the following occur:
 
     a. Receipt of an ICMP DESTINATION UNREACHABLE message
-    b. ICMP ECHO REQUEST send fails due to a network error
-    c. ICMP ECHO REQUEST send fails with Socket buffer full error
+    b. ICMP ECHO REQUEST send fails due to a network error (e.g. network is unreachable)
+    c. ICMP ECHO REQUEST send fails due to a permissions error (e.g. lease address
+    is a broadcast address)
+    d. ICMP ECHO REQUEST send fails with socket buffer full error
 
     In each of these instances the address could not be checked and is treated as
     available.