■ VPN IPv6—If you specify the VPN-IPv6 address family, you can configure the
router to provide IPv6 VPN services over an MPLS backbone. These VPNs are
often referred to as BGP/MPLS VPNs.
■ L2VPN—If you specify the L2VPN address family, you can configure the PE router
for VPLS L2VPNs or VPWS L2VPNs to exchange layer 2 network layer reachability
information (NLRI) for all VPLS or VPWS instances. Optionally, you can use the
signaling keyword with the address-family command for the L2VPN address
family to specify BGP signaling of L2VPN reachability information. Currently,
you can omit the signaling keyword with no adverse effects. For a description
of VPLS, see “Configuring VPLS” on page 589. For a description of VPWS, see
“Configuring VPWS” on page 657.
■ Route-target—If you specify the route-target address family, you can configure
the router to exchange route-target membership information to limit the number
of routes redistributed among members. For a description of route-target filtering,
see “Configuring BGP-MPLS Applications” on page 379.
■ VPLS—If you specify the VPLS address family, you can configure the router to
exchange layer 2 NLRI for a specified VPLS instance. For a description of VPLS,
see “Configuring VPLS” on page 589.
■ VPWS—If you specify the VPWS address family, you can configure the PE router
to exchange layer 2 NLRI for a specified VPWS instance. For a description of
VPWS, see “Configuring VPWS” on page 657.
Any command issued outside the context of an address family applies to the unicast
IPv4 address family by default.
To limit the exchange of routes to those from within the address family and to set
other desired BGP parameters:
1. Access Router Configuration mode and create peers and peer groups. These
peers and peer groups are in the default IPv4 address family.
host1(config)#router bgp 100
host1(config-router)#neighbor 10.10.2.2 remote-as 100
host1(config-router)#neighbor 10.10.3.3 remote-as 100
host1(config-router)#neighbor ibgp peer-group
2. In Router Configuration mode, create the address family within which the router
exchanges addresses; this creation accesses Address Family Configuration mode.
host1(config-router)#address-family vpn4 unicast
3. From within the address family, activate individual neighbors or peer groups to
exchange routes from within the current address family. These peers or peer
groups must first be created in the IPv4 address family.
host1(config-router-af)#neighbor ibgp activate
4. If you have activated a peer group, from within the address family add peers as
members of the peer group. These peers must first be created in the IPv4 address
family.
host1(config-router-af)#neighbor 10.10.2.2 peer-group ibgp
host1(config-router-af)#neighbor 10.10.3.3 peer-group ibgp
44 ■ Configuring BGP Peer Groups
JUNOSe 11.1.x BGP and MPLS Configuration Guide
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