diff --git a/perl-xCAT/xCAT/FSPconn.pm b/perl-xCAT/xCAT/FSPconn.pm
index c3f3d74a8..ee1c27707 100644
--- a/perl-xCAT/xCAT/FSPconn.pm
+++ b/perl-xCAT/xCAT/FSPconn.pm
@@ -69,6 +69,10 @@ sub mkhwconn_parse_args
 
     return usage() if ( exists $opt{h});
 
+    if ( !exists $opt{t} and !exists $opt{p}) {
+        return ( usage('Flag -t or -p must be used.'));
+    }
+
     if ( exists $opt{t} and exists $opt{p})
     {
         return( usage('Flags -t and -p cannot be used together.'));
diff --git a/perl-xCAT/xCAT/PPCconn.pm b/perl-xCAT/xCAT/PPCconn.pm
index b794aa5b9..af327ce47 100644
--- a/perl-xCAT/xCAT/PPCconn.pm
+++ b/perl-xCAT/xCAT/PPCconn.pm
@@ -59,11 +59,14 @@ sub mkhwconn_parse_args
     }
     return usage() if ( exists $opt{h});
 
-    #if ( exists $opt{s} )
-    #{
-    #    return( usage('Flags -s is just used in direct-attach enviroment.'));
-    #}
-    
+#if ( exists $opt{s} )
+#{
+#    return( usage('Flags -s is just used in direct-attach enviroment.'));
+#}
+    if ( !exists $opt{t} and !exists $opt{p} and !exists $opt{s}) {
+        return ( usage('Flag -t or -p or -s must be used.'));
+    }
+
     if ( exists $opt{t} and exists $opt{p})
     {
         return( usage('Flags -t and -p cannot be used together.'));
diff --git a/perl-xCAT/xCAT/Usage.pm b/perl-xCAT/xCAT/Usage.pm
index 3a9b26fc9..f23fb4de2 100644
--- a/perl-xCAT/xCAT/Usage.pm
+++ b/perl-xCAT/xCAT/Usage.pm
@@ -179,7 +179,7 @@ my %usage = (
        rmvm [-h|--help|-v|--version]",
     "lsslp" =>
 "Usage: lsslp [-h|--help|-v|--version]
-       lsslp [<noderange>][-V|--verbose][-i ip[,ip..]][-w][-r|-x|-z][-n][-I][-s BPA|MM|IVM|RSA|FSP|HMC][-C counts][-T timeout]
+       lsslp [<noderange>][-V|--verbose][-i ip[,ip..]][-w][-r|-x|-z][-n][-I][-s FRAME|CEC|MM|IVM|RSA|HMC][-C counts][-T timeout]
              [-t tries][-m][-e cmd][-c [timeinterval[interval,..]]][--vpdtable]
              [-M vpd|switchport][--makedhcp][--updatehost][--resetnet]",
   "rflash" =>