The value of vRtrIsisExportPolicy4 is the name of the fourth policy to be used for determining which routes are exported from the routing table to IS-IS. If no export policy is defined, non IS-IS router will not be exported from the routing table manager to IS-IS. If multiple policy names are specified, the policies are evaluated in the order they are specified. The first policy that matches is applied. The export policy name list, vRtrIsisExportPolicy1 through vRtrIsisExportPolicy5, is handled by the SNMP agent as a single entity. When an SNMP SET request is received to modify one or more of the policy names, all the policy variables are first set to the empty string, ''H, and then the new names are set into the specified policy variables within a single SNMP SET PDU.