diff --git a/perl-xCAT/xCAT/Schema.pm b/perl-xCAT/xCAT/Schema.pm
index d0c34b80f..10c366997 100644
--- a/perl-xCAT/xCAT/Schema.pm
+++ b/perl-xCAT/xCAT/Schema.pm
@@ -805,7 +805,7 @@ servicenode => {
   ftpserver => 'Do we set up a ftp server on this service node? Not supported on AIX Valid values:yes or 1, no or 0. If yes, configure and start vsftpd.  (You must manually install vsftpd on the service nodes before this.) If no or 0, it does not change the current state of the service. xCAT is not using ftp for compute nodes provisioning or any other xCAT features, so this attribute can be set to 0 if the ftp service will not be used for other purposes',
   nimserver => 'Not used. Do we set up a NIM server on this service node? Valid values:yes or 1, no or 0. If no or 0, it does not change the current state of the service.',
   ipforward => 'Do we set up ip forwarding on this service node? Valid values:yes or 1, no or 0. If no or 0, it does not change the current state of the service.',
-  dhcpinterfaces => 'The network interfaces DHCP server should listen on for the target node. This attribute can be used for management node and service nodes.  If defined, it will override the values defined in site.dhcpinterfaces.',
+  dhcpinterfaces => 'The network interfaces DHCP server should listen on for the target node. This attribute can be used for management node and service nodes.  If defined, it will override the values defined in site.dhcpinterfaces. This is a comma separated list of device names. !remote! indicates a non-local network for relay DHCP. For example: !remote!,eth0,eth1',
 
      comments => 'Any user-written notes.',
      disable => "Set to 'yes' or '1' to comment out this row.",