diff --git a/xCAT-server-2.0/lib/xcat/plugins/ipmi.pm b/xCAT-server-2.0/lib/xcat/plugins/ipmi.pm
index 138ceb632..6ac214259 100644
--- a/xCAT-server-2.0/lib/xcat/plugins/ipmi.pm
+++ b/xCAT-server-2.0/lib/xcat/plugins/ipmi.pm
@@ -944,16 +944,34 @@ sub getnetinfo {
 		\@returnd
 	);
 
+
 	if($error) {
 		$rc = 1;
 		$text = $error;
 	}
 	else {
+          # response format:
+          # 4 bytes   (RMCP header)
+          # 1 byte    (auth type)
+          # 4 bytes   (session sequence)
+          # 4 bytes   (session id)
+          # 16 bytes  (message auth code, not present if auth type is 0, $authoffset=16)
+          # 1 byte    (ipmi message length)
+          # 1 byte    (requester's address
+          # 1 byte    (netfun, req lun)
+          # 1 byte    (checksum)
+          # 1 byte    (Responder's slave address)
+          # 1 byte    (Sequence number, generated by the requester)
+          # 1 byte    (command)
+          # 1 byte    (return code)
+          # 1 byte    (param revision)
+          # N bytes   (data)
+          # 1 byte    (checksum)
 		if($subcommand eq "garp") {
-			$code = $returnd[36];
+			$code = $returnd[36-$authoffset];
 
 			if($code == 0x00) {
-				$code = $returnd[38] / 2;
+				$code = $returnd[38-$authoffset] / 2;
 				$text = sprintf("$format %d","Gratuitous ARP seconds:",$code);
 			}
 			else {
@@ -962,7 +980,7 @@ sub getnetinfo {
 			}
 		}
       elsif($subcommand eq "alert") {
-         if ($returnd[39] & 0x8) { 
+         if ($returnd[39-$authoffset] & 0x8) { 
             $text = "SP Alerting: enabled";
          } else {
             $text = "SP Alerting: disabled";
@@ -971,50 +989,50 @@ sub getnetinfo {
 		elsif($subcommand =~ m/^snmpdest(\d+)/ ) {
 			$text = sprintf("$format %d.%d.%d.%d",
 				"SP SNMP Destination $1:",
-				$returnd[41],
-				$returnd[42],
-				$returnd[43],
-				$returnd[44]);
+				$returnd[41-$authoffset],
+				$returnd[42-$authoffset],
+				$returnd[43-$authoffset],
+				$returnd[44-$authoffset]);
 		}
 		elsif($subcommand eq "ip") {
 			$text = sprintf("$format %d.%d.%d.%d",
 				"BMC IP:",
-				$returnd[38],
-				$returnd[39],
-				$returnd[40],
-				$returnd[41]);
+				$returnd[38-$authoffset],
+				$returnd[39-$authoffset],
+				$returnd[40-$authoffset],
+				$returnd[41-$authoffset]);
 		}
 		elsif($subcommand eq "netmask") {
 			$text = sprintf("$format %d.%d.%d.%d",
 				"BMC Netmask:",
-				$returnd[38],
-				$returnd[39],
-				$returnd[40],
-				$returnd[41]);
+				$returnd[38-$authoffset],
+				$returnd[39-$authoffset],
+				$returnd[40-$authoffset],
+				$returnd[41-$authoffset]);
 		}
 		elsif($subcommand eq "gateway") {
 			$text = sprintf("$format %d.%d.%d.%d",
 				"BMC Gateway:",
-				$returnd[38],
-				$returnd[39],
-				$returnd[40],
-				$returnd[41]);
+				$returnd[38-$authoffset],
+				$returnd[39-$authoffset],
+				$returnd[40-$authoffset],
+				$returnd[41-$authoffset]);
 		}
 		elsif($subcommand eq "backupgateway") {
 			$text = sprintf("$format %d.%d.%d.%d",
 				"BMC Backup Gateway:",
-				$returnd[38],
-				$returnd[39],
-				$returnd[40],
-				$returnd[41]);
+				$returnd[38-$authoffset],
+				$returnd[39-$authoffset],
+				$returnd[40-$authoffset],
+				$returnd[41-$authoffset]);
 		}
 		elsif ($subcommand eq "community") {
 			$text = sprintf("$format ","SP SNMP Community:");
-			my $l = 38;
+			my $l = 38-$authoffset;
 			while ($returnd[$l] ne 0) {
 				$l = $l + 1;
 			}
-			my $i=38;
+			my $i=38-$authoffset;
 			while ($i<$l) {
 				$text = $text . sprintf("%c",$returnd[$i]);
 				$i = $i + 1;