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Configuring Policy-Based Export for Routing Instances

Configuring policy-based export simplifies the process of exchanging route information between routing instances.

Exporting routing information between routing instances typically is accomplished by configuring separate routing table groups for each instance. The use of policy-based export reduces the configuration needed for exporting routes between multiple routing instances by eliminating the configuration of separate routing table groups for each instance.

Policy-based export is particularly useful in the following two cases:

Overlapping VPNs—VPN configurations in which more than one VRF has the same route target

Nonforwarding instances—Multilevel IGPs using multiple routing instances

Note: The instance-export and instance-import statements are not valid for VRF instances. The auto-export statement is valid for VRF and non-VRF instances. The instance-import statement automatically enables auto-export for non-VRF instances.

For detailed information about configuring overlapping VPNs and nonforwarding instances, see the JUNOS VPNs Configuration Guide.

For sample configurations, see the following sections:

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