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topology (Protocols BGP)

 

Syntax

Hierarchy Level

Release Information

Statement introduced in Junos OS Release 9.0.

Statement introduced in Junos OS Release 11.3 for the QFX Series.

Description

Enable a topology for BGP multitopology routing. You must first configure one or more topologies under the [edit routing-options] hierarchy level.

Apply the community tags to identify the application topologies by configuring a routing topology name and BGP community value.

In Junos OS, multitopology support for BGP is based on the community value in a BGP route. This configuration determines the association between a topology and one or more community values and populates the topology routing tables. Arriving BGP updates that have a matching community value are replicated in the associated topology routing table. You decide which BGP community values are associated with a given topology.

For example, you can create a configuration that causes BGP updates that are received with community value target:40:40 to be added into topology routing table :voice.inet.0 (in addition to the default routing table inet.0). Likewise, you configuration can specify that updates that are received with community value target:50:50 are added into topology routing table :video.inet.0 (in addition to the default routing table inet.0).

Options

name—Name of a topology you configured at the [edit routing-options] hierarchy level to create a topology for a specific type of traffic, such as voice or video.

Required Privilege Level

routing—To view this statement in the configuration.

routing-control—To add this statement to the configuration.