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Example Terminology
The following terminology is used in these examples
and is specific to Juniper Networks:
-
bgp.l3vpn.0—The table on the provider edge
(PE) router in which the VPN-IPv4 routes that are received from another
PE router are stored. Incoming routes are checked against the vrf-import statements from all the VPNs configured on the PE
router. If there is a match, the VPN–Internet Protocol
version 4 (IPv4) route is added to the bgp.l3vpn.0 table.
To view the bgp.l3vpn.0 table, issue the show route table
bgp.l3vpn.0 command.
-
routing-instance-name.inet.0—The routing table for a specific routing instance. For example,
a routing instance called VPN-A has a routing table called VPN-A.inet.0. Routes are added to this table in the following
ways:
- They are sent from a customer edge (CE) router configured
within the VPN-A routing instance.
- They are advertised from a remote PE router that passes
the vrf-import policy configured within VPN-A (to view the
route, run the show route command). IPv4 (not VPN-IPv4)
routes are stored in this table.
-
vrf-import policy-name—An
import policy configured on a particular routing instance on a PE
router. This policy is required for the configuration of interprovider
and carrier-of-carriers VPNs. It is applied to VPN-IPv4 routes learned
from another PE router or a route reflector.
-
vrf-export policy-name—An
export policy configured on a particular routing instance on a PE
router. It is required for the configuration of interprovider and
carrier-of-carriers VPNs. It is applied to VPN-IPv4 routes (originally
learned from locally connected CE routers as IPv4 routes), which
are advertised to another PE router or route reflector.
- MP-EBGP—The multiprotocol external BGP (MP-EBGP)
mechanism is used to export VPN-IPv4 routes across an autonomous system
(AS) boundary. To apply this mechanism, use the labeled-unicast statement at the [edit protocols bgp group group-name family inet] hierarchy level.
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