topology (Protocols BGP)
Syntax
topology name {
community {
target identifier;
}
}
Hierarchy Level
[edit logical-systems logical-system-name protocols bgp family (inet | inet6) unicast], [edit logical-systems logical-system-name protocols bgp group group-name family (inet | inet6) unicast], [edit logical-systems logical-system-name protocols bgp group group-name neighbor address family (inet | inet6) unicast], [edit logical-systems logical-system-name routing-instances routing-instance-name protocols bgp family (inet | inet6) unicast], [edit logical-systems logical-system-name routing-instances routing-instance-name protocols bgp group group-name family (inet | inet6) unicast], [edit logical-systems logical-system-name routing-instances routing-instance-name protocols bgp group group-name neighbor address family (inet | inet6) unicast], [edit protocols bgp family (inet | inet6) unicast], [edit protocols bgp group group-name family (inet | inet6) unicast], [edit protocols bgp group group-name neighbor address family (inet | inet6) unicast], [edit routing-instances routing-instance-name protocols bgp family (inet | inet6) unicast], [edit routing-instances routing-instance-name protocols bgp group group-name family (inet | inet6) unicast], [edit routing-instances routing-instance-name protocols bgp group group-name neighbor address family (inet | inet6)]
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 |
community |
Configure the community to identify the multitopology routes. BGP uses the target community identifier to install the routes it learns in the appropriate multitopology routing tables.
|
Required Privilege Level
routing—To view this statement in the configuration.
routing-control—To add this statement to the configuration.
Release Information
Statement introduced in Junos OS Release 9.0.