diff --git a/perl-xCAT/xCAT/Schema.pm b/perl-xCAT/xCAT/Schema.pm
index 5c84c9d1b..a3fd92ee3 100644
--- a/perl-xCAT/xCAT/Schema.pm
+++ b/perl-xCAT/xCAT/Schema.pm
@@ -433,7 +433,7 @@ networks => {
   net => 'The network address.',
   mask => 'The network mask.',
   mgtifname => 'The interface name of the management/service node facing this network.  !remote! indicates a non-local network for relay DHCP.',
-  gateway => 'The network gateway.',
+  gateway => 'The network gateway. It can be set to an ip address or the keyword <myself>, the keyword <myself> indicates the cluster-facing ip address configured on this management node or service node. Leaving this field blank means that there is no gateway for this network.',
   dhcpserver => 'The DHCP server that is servicing this network.  Required to be explicitly set for pooled service node operation.',
   tftpserver => 'The TFTP server that is servicing this network.  If not set, the DHCP server is assumed.',
   nameservers => 'The nameservers for this network.  Used in creating the DHCP network definition, and DNS configuration.',