■ Multicast IPv6—If you specify the multicast IPv6 address family, you can use
BGP to exchange routing information about how to reach an IPv6 multicast
source instead of an IPv6 unicast destination. For a general description of
multicasting, see JUNOSe Multicast Routing Configuration Guide.
■ 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.
■ 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.
As discussed in “Understanding BGP Command Scope” on page 18 , BGP configuration
commands fall into five categories. If you specify the multicast address family, from
within the Address Family Configuration mode you can issue the commands listed
in Table 7 on page 19 to configure parameters that affect the multicast address family
globally. You can issue the commands listed in Table 9 on page 20 to configure a
peer or peer group that you have activated in the multicast address family without
affecting those configuration parameters for any other address family within which
the peer or peer group is activated.
If you issue any of the commands listed in Table 8 on page 19 from within the default
IPv4 unicast address family to configure a peer or peer group, you can apply those
configuration values to the same entity in the multicast address family by activating
the peer or peer group in the multicast address family.
Example To add a peer to the multicast routing table, first add the peer to the unicast routing
table, and then copy it to the multicast routing table.
host1(config)#router bgp 22
host1(config-router)#neighbor 192.168.55.122 remote-as 33
host1(config-router)#address-family ipv4 multicast
host1(config-router-af)neighbor 192.168.55.122 activate
address-family
■ Use to configure the router to exchange IPv4 or IPv6 addresses by creating the
specified address family.
■ IPv4 addresses can be exchanged in unicast, multicast, or VPN mode. IPv6
addresses can be exchanged in unicast mode.
154 ■ Configuring BGP Multicasting
JUNOSe 11.1.x BGP and MPLS Configuration Guide
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