Routing policy is provided to the stack by the Policy Agent. The Policy Agent main configuration file contains a TcpImage statement for each stack that is to receive policy, and can optionally contain a CommonRoutingConfig statement that identifies a local shared routing policy file. The TcpImage statement identifies the z/OS® UNIX file or MVS™ data set that contains policy for that stack. This policy file can contain a RoutingConfig statement to identify the z/OS UNIX file or MVS data set that contains the local routing policy. The RoutingConfig statement is required for each stack that is to receive routing policy. If both a RoutingConfig statement and a CommonRoutingConfig statement are defined, the specified CommonRoutingConfig file is processed before the RoutingConfig policy file specified for that stack.
On the policy server, use the DynamicConfigPolicyLoad statement to specify the remote routing policies. On the policy client, use the PolicyServer statement to retrieve the remote routing policies from the policy server.
In the routing policy file, routing rules define sets of conditions that are compared when a route is being selected to send TCP or UDP traffic that originates in the TCP/IP stack. If a rule match is found, an appropriate route for the traffic is selected based on the route tables that are specified in the action that is associated with the rule.