diff --git a/xCAT-server/lib/xcat/plugins/slpdiscover.pm b/xCAT-server/lib/xcat/plugins/slpdiscover.pm
index 4a1ec0a22..cb10b8cde 100644
--- a/xCAT-server/lib/xcat/plugins/slpdiscover.pm
+++ b/xCAT-server/lib/xcat/plugins/slpdiscover.pm
@@ -79,22 +79,10 @@ sub process_request {
 	$callback = shift;
 	$docmd = shift;
 	%searchmacs=();
+	%flexchassismap = ();
 	my $srvtypes = [ qw/service:management-hardware.IBM:chassis-management-module service:management-hardware.IBM:management-module service:management-hardware.IBM:integrated-management-module2/ ];
 	xCAT::SLP::dodiscover(SrvTypes=>$srvtypes,Callback=>\&handle_new_slp_entity);
-	$macmap = xCAT::MacMap->new();
-	$macmap->refresh_table();
-	my @toconfig;
-	foreach my $mac (keys(%searchmacs)) {
-		my $node = $macmap->find_mac($mac,1);
-		unless ($node) {
-			next;
-		}
-		my $data = $searchmacs{$mac};
-		$data->{nodename}=$node;
-		$data->{macaddress}=$mac;
-		$chassisbyuuid{$data->{attributes}->{"enclosure-uuid"}->[0]}=$node;
-		push @toconfig,$data;
-	}
+	
 	my $mpatab=xCAT::Table->new("mpa",-create=>0);
 	my @mpaentries;
 	$mpahash={};
@@ -117,13 +105,13 @@ sub process_request {
 	}
 	my $mactab = xCAT::Table->new("mac");
 	my %machash;
+	my %node2machash;
 	my %macuphash;
 	my @maclist = $mactab->getAllNodeAttribs([qw/node mac/]);
 	foreach (@maclist) {
 		$machash{$_->{node}}=$_->{mac};
+		$node2machash{$_->{mac}} = $_->{node};
 	}
-		
-
 	
 	my $mptab = xCAT::Table->new('mp');
 	if ($mptab) {
@@ -132,7 +120,26 @@ sub process_request {
 			$nodebymp{$_->{mpa}}->{$_->{id}}=$_->{node};
 		}
 	}
-		
+
+	$macmap = xCAT::MacMap->new();
+	$macmap->refresh_table();
+	my @toconfig;
+	foreach my $mac (keys(%searchmacs)) {
+		my $node = $macmap->find_mac($mac,1);
+		unless ($node) {
+			if (defined $node2machash{$mac}) {
+				$node = $node2machash{$mac};
+			} else {
+				next;
+			}
+		}
+		my $data = $searchmacs{$mac};
+		$data->{nodename}=$node;
+		$data->{macaddress}=$mac;
+		$chassisbyuuid{$data->{attributes}->{"enclosure-uuid"}->[0]}=$node;
+		push @toconfig,$data;
+	}
+
 	foreach my $data (@toconfig) {
 		my $mac = $data->{macaddress};
 		my $nodename = $data->{nodename};
@@ -141,13 +148,16 @@ sub process_request {
 			$addr .= "%".$data->{scopeid};
 		}
 		$flexchassisuuid{$nodename}=$data->{attributes}->{"enclosure-uuid"}->[0];
-		setup_cmm_pass($nodename);
-		if ($machash{$nodename} =~ /$mac/i) { #ignore prospects already known to mac table
-			configure_hosted_elements($nodename);
-			next;
-		}
+		
 		if ($data->{SrvType} eq "service:management-hardware.IBM:chassis-management-module") {
 			sendmsg(":Found ".$data->{SrvType}." at address $addr",$callback,$nodename);
+			
+			setup_cmm_pass($nodename);
+			if ($machash{$nodename} =~ /$mac/i) { #ignore prospects already known to mac table
+				configure_hosted_elements($nodename);
+				next;
+			}
+		
 			unless (do_blade_setup($data,curraddr=>$addr)) {
 				next;
 			}
@@ -172,14 +182,21 @@ sub setupIMM {
 	my $newaddr;
 	if ($ient) {
 		my $bmcid=$ient->{bmcid};
-		if ($bmcid and $slpdata->{macaddress} =~ /$bmcid/) { return; } #skip configuration, we already know this one
+		if ($bmcid and $slpdata->{macaddress} =~ /$bmcid/) { 
+			sendmsg("The IMM ".$node." has been configured (ipmi.bmcid). Skipped.",$callback);
+			return; 
+		} #skip configuration, we already know this one
 		$newaddr = $ient->{bmc};
 	}
 	my @ips;
 	if ($newaddr) {
 		@ips = xCAT::NetworkUtils::getipaddr($newaddr,GetAllAddresses=>1);
 	}
-	sendmsg(":Configuration of ".$node." commencing, configuration may take a few minutes to take effect",$callback);
+	if (!@ips) {
+		sendmsg(":Cannot find the IP attribute for bmc",$callback,$node);
+		return;
+	}
+	sendmsg(":Configuration of ".$node."[".join(',',@ips)."] commencing, configuration may take a few minutes to take effect",$callback);
 	#ok, with all ip addresses in hand, time to enable IPMI and set all the ip addresses (still static only, TODO: dhcp
 	my $ssh = new xCAT::SSHInteract(-username=>$args{username},
 					-password=>$args{password},
@@ -210,8 +227,8 @@ sub configure_hosted_elements {
 	my $node;
 	my $immdata;
 	my $slot;
-        my $user = $passwordmap{$cmm}->{username};
-        my $pass = $passwordmap{$cmm}->{password};
+	my $user = $passwordmap{$cmm}->{username};
+	my $pass = $passwordmap{$cmm}->{password};
 	foreach $immdata (@{$flexchassismap{$uuid}}) {
 		$slot=$immdata->{attributes}->{slot}->[0];
 		if ($node = $nodebymp{$cmm}->{$slot}) {
@@ -232,10 +249,10 @@ sub setup_cmm_pass {
 	my $localpass=$defaultbladepass;
 	if ($mpahash->{$nodename}) {
 		if ($mpahash->{$nodename}->{username}) {
-			$localuser = $mpahash->{$nodename}->[0]->{username};
+			$localuser = $mpahash->{$nodename}->{username};
 		}
 		if ($mpahash->{$nodename}->{password}) {
-			$localuser = $mpahash->{$nodename}->[0]->{password};
+			$localpass = $mpahash->{$nodename}->{password};
 		}
 	}
         $passwordmap{$nodename}->{username}=$localuser;