Configure IPv4 IS-IS redistribution

Before you begin

To perform this procedure on a non-default VRF, you must first change the VRF instance. For information about how to use EDM for a non-default VRF, see Select and Launch a VRF Context View. All parameters might not be available in non-default VRFs.

About this task

Use this procedure to configure IS-IS redistribution. In a non-default VRF, just like in the Global Router, the routes are not redistributed into IS-IS automatically. To advertise the VRF routes, you must explicitly redistribute a protocol into IS-IS, within the context of a VRF. Routing between VRFs is also possible by using redistribution policies and injecting routes from the other protocols.

The VRF specific routes are transported in TLV 184 with the I-SID assigned to the VPNs. After extracting the IP VPN IP reachability information, the routes are installed in the route tables of the appropriate VRFs based on the I-SID association.

Procedure

In the navigation pane, expand Configuration > IP.
Select IS-IS.
Select the Redistribute tab.
Select Insert.
In SrcVrfId, select the source VRF ID.
In RouteSource, select the protocol for route redistribution.
Complete the remaining optional fields as required.
Select enable.
Select Insert.

IS-IS Redistribute Field Descriptions

Use the data in the following table to use the IS-IS Redistribute tab.


Name	Description
DstVrfId	Specifies the destination Virtual Routing and Forwarding (VRF) ID used in the redistribution.
Protocol	Specifies the protocols that receive the redistributed routes.
SrcVrfId	Specifies the source VRF ID used in the redistribution. For IS-IS, the source VRF ID must be the same as the destination VRF ID.
RouteSource	Specifies the source protocol for the route redistribution entry.
Enable	Enables or disables a redistribution entry. The default is disable.
RoutePolicy	Specifies the route policy to be used for the detailed redistribution of external routes from a specified source into the IS-IS domain.
Metric	Specifies the metric for the redistributed route. The value can be a range between 0 to 65535. The default value is 0. Use a value that is consistent with the destination protocol.
MetricType	Specifies the metric type. Specifies a type1 or a type2 metric. For metric type1, the cost of the external routes is equal to the sum of all internal costs and the external cost. For metric type2, the cost of the external routes is equal to the external cost alone. The default is type2.
Subnets	Indicates whether the subnets are advertised individually or aggregated to their classful subnet. Choose suppress to advertise subnets aggregated to their classful subnet. Choose allow to advertise the subnets individually with the learned or configured mask of the subnet. The default is allow.
SetTag	Tag routes that BGP or OSPF redistribute into IS-IS. You can then configure router filtering to prevent tagged IS-IS routes from being redistributed back to BGP or OSPF. To use IS-IS Route Tagging on GRT IS-IS routes, you must also configure the metric-type as external. If you want to use IS-IS tags on GRT as internal routes, all Fabric nodes must be above a minimum software version. Any switch in the SPB Fabric that runs earlier software versions triggers an exception if you use metric type internal. To ensure this does not occur, if you attempt to configure a tag and the metric-type is not external, the switch reminds you to upgrade the software on all devices. You must ensure all devices in the network run the minimum required software.