diff --git a/xCAT-client/pods/man1/rpower.1.pod b/xCAT-client/pods/man1/rpower.1.pod
index 8b5052f00..ac1e2bb7f 100644
--- a/xCAT-client/pods/man1/rpower.1.pod
+++ b/xCAT-client/pods/man1/rpower.1.pod
@@ -8,6 +8,10 @@ B<rpower> I<noderange> [B<--nodeps>] [B<on>|B<onstandby>|B<off>|B<suspend>|B<sta
 
 B<rpower> [B<-h>|B<--help>|B<-v>|B<--version>]
 
+=head2 BMC (using IPMI) specific:
+
+B<rpower> I<noderange> [B<on>|B<off>|B<softoff>|B<reset>|B<boot>|B<stat>|B<state>|B<status>|B<wake>|B<suspend> [B<-w> I<timeout>] [B<-o>] [B<-r>]] 
+
 =head2 PPC (with IVM or HMC) specific:
 
 B<rpower> I<noderange> [B<--nodeps>] {B<of>}
@@ -80,13 +84,40 @@ Reboot the service processor. If there are primary and secondary FSPs/BPAs of on
 
 Attempt to request clean shutdown of OS (may not detect failures in completing command)
 
+For stateless osimage, the 'acpid' package needs to be added to the .pkglist configuration file for the stateless osimage to enable the 'softoff' function.
+
 =item B<off>
 
 Turn power off.
 
 =item B<suspend>
 
-Suspend the target nodes execution
+Suspend the target nodes execution.
+
+The B<suspend> action could be run together with B<-w> B<-o> B<-r>.
+
+Refer to the following steps to enable the B<suspend> function:
+
+1. Add the 'acpid' and 'suspend' package to the .pkglist of your osimage so that the required package could be installed correctly to your target system.
+
+2. Add two configuration files for the base function:
+
+ /etc/pm/config.d/suspend
+     S2RAM_OPTS="--force --vbe_save --vbe_post --vbe_mode"
+
+ /etc/acpi/events/suspend_event
+     event=button/sleep.*
+     action=/usr/sbin/pm-suspend
+
+3. Add the hook files for your specific applications which need specific action before or after the suspend action.
+
+Refer to the 'pm-utils' package for how to create the specific hook files.
+
+=item B<wake>
+
+Wake up the target nodes which is in B<suspend> state.
+
+Don't try to run B<wake> against the 'on' state node, it would cause the node gets to 'off' state.
 
 =item B<stat>|B<state>
 
@@ -134,6 +165,18 @@ Specify the the timeout, in minutes, to wait for the expectedstatus specified by
 
 Power off, then on.
 
+=item B<-w> I<timeout>
+
+To set the I<timeout> for the B<suspend> action to wait for the success.
+
+=item B<-o>
+
+To specify that the target node will be power down if B<suspend> action failed.
+
+=item B<-r>
+
+To specify that the target node will be reset if B<suspend> action failed.
+
 =item B<-h>|B<--help>
 
 Prints out a brief usage message.