+<!ELEMENT zoneRoute (link_ctn*)>
+<!ATTLIST zoneRoute src CDATA #REQUIRED>
+<!ATTLIST zoneRoute dst CDATA #REQUIRED>
+<!ATTLIST zoneRoute gw_src CDATA #REQUIRED>
+<!ATTLIST zoneRoute gw_dst CDATA #REQUIRED>
+<!ATTLIST zoneRoute symmetrical (YES|NO) "YES">
+