diff --git a/xCAT-client-2.0/pods/man8/mkrrnodes.8.pod b/xCAT-client-2.0/pods/man8/mkrrnodes.8.pod
index 04c2f060c..30ce0d194 100644
--- a/xCAT-client-2.0/pods/man8/mkrrnodes.8.pod
+++ b/xCAT-client-2.0/pods/man8/mkrrnodes.8.pod
@@ -5,7 +5,7 @@ B<mkrrnodes> - Adds or deletes nodes in the xCAT cluster database.
 
 =head1 SYNOPSIS
 
-B<mkrrnodes> [-d ]| [-C a|b|,...,r]  -R [startrange,endrange]
+B<mkrrnodes> [-d ]| [-C a|b|,...,r] -L [Start Rack number for CU] -R [startrange,endrange]
 
 
 B<mkrrnodes> [B<-h> | B<--help>]
@@ -48,13 +48,13 @@ An error has occurred.
 
 =item *
 
-To build a nodelist entry like this "rrb048c","rrb048,qs22,cub,cell,cell-c,compute,tb,all,rack06",,,,:
+To build a nodelist entry like this "rrb048c","rrb048,qs22,cub,cell,cell-c,cell-cub-c,compute,tb,all,rack20",,,,:
 
-B<mkrrnodes> -C b -R 048,048
+B<mkrrnodes> -C b -L 45 -R 048,048
 
-To delete a nodelist entry like this "rrb048c","rrb048,qs22,cub,cell,cell-c,compute,tb,all,rack06",,,,:
+To delete a nodelist entry like this "rrb048c","rrb048,qs22,cub,cell,cell-c,cell-cub-c,compute,tb,all,rack20",,,,:
 
-B<mkrrnodes> -d -C b -R 048,048
+B<mkrrnodes> -d -C b -L 45 -R 048,048
 
 =item *