diff --git a/xCAT-server-2.0/lib/xcat/plugins/blade.pm b/xCAT-server-2.0/lib/xcat/plugins/blade.pm
index 565a0ddb0..cea6a17b3 100644
--- a/xCAT-server-2.0/lib/xcat/plugins/blade.pm
+++ b/xCAT-server-2.0/lib/xcat/plugins/blade.pm
@@ -258,6 +258,9 @@ sub eventlog { #Tried various optimizations, but MM seems not to do bulk-request
   my $data;
   my @output;
   my $oid = $eventlogoid;
+  unless ($cmd) {
+   $cmd='all';
+  }
   if ($cmd eq 'all') {
     $cmd=65535; #no MM has this many logs possible, should be a good number
   }
diff --git a/xCAT-server-2.0/lib/xcat/plugins/ipmi.pm b/xCAT-server-2.0/lib/xcat/plugins/ipmi.pm
index 2d0087405..0fcf10fa2 100644
--- a/xCAT-server-2.0/lib/xcat/plugins/ipmi.pm
+++ b/xCAT-server-2.0/lib/xcat/plugins/ipmi.pm
@@ -2349,6 +2349,9 @@ sub eventlog {
 
 	($rc,$text,$mfg_id,$prod_id,$device_id) = getdevid();
 	$rc=0;
+   unless (defined($subcommand)) {
+      $subcommand = 'all';
+   }
 	if($subcommand eq "all") {
 		$num = 0x100 * 0x100;
 	}