Routing Instances

Table Of Contents

Notes
Command Summary
Additional References

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Notes

In the Cisco world, you can use VRF-Lite to create additional routing tables on a router or L3 switch. This creates separation at layer-3 like VLANs do at layer-2.

Juniper have something similar (although not identical) called a routing instance.

There are several types of routing instance, depending on how they should be used.

The ‘Virtual Router’ and ‘No-Forwarding’ types are the closest to VRF-Lite. Virtual router creates an additional routing table and an additional forwarding table.

The no-forwarding type creates an additional routing table, but the best routes still end up in the global forwarding table. You might use this if you want to create multiple instances of OSPF or some other routing protocol.

Other routing instance types include:

VRF – MPLS Network
L2VPN – VPLS Network
Forwarding – Filter-Based Forwarding (FBF; Like Cisco’s PBR)

Command Summary

Command	Mode	Description
set routing-instances NAME instance-type TYPE	Configuration	Create a routing instance
set routing-instances NAME interface	Configuration	Assign interfaces to a routing instance
set routing-instances NAME routing-options static route NETWORK next-hop IP	Configuration	Add a static route to a routing instance
show route instance	Operational	See the routing instances
show route table INSTANCE.inet.0	Operational	See the routing table for the routing instance

Additional References

Routing Instances Overview

Juniper Routing Instances