host1(config-router-af)#neighbor 2.2.2.2 activate
d. Configure the MP-BGP PE neighbor to send labeled IPv6 prefixes.
host1(config-router-af)#neighbor 2.2.2.2 send-label
host1(config-router-af)#neighbor 2.2.2.2 update-source loopback 1
host1(config-router-af)#neighbor 2.2.2.2 next-hop-self
host1(config-router-af)#exit-address-family
7. Configure the P router with an IPv4 IGP and an MPLS signaling protocol.
8. Configure the PE 2 router as you did PE 1 in Steps 1–6.
9. Configure the CE 1 and CE 2 routers.
a. Configure both an IPv4 and an IPv6 interface toward the PE router. Use an
IPv4-compatible IPv6 address.
b. Configure an MP-BGP session to the PE router over TCPv4, and activate the
IPv6 unicast address family.
neighbor send-label
â– Use to cause an MP-BGP neighbor to distribute an MPLS label with its IPv6 prefix
advertisements.
â– If you specify a BGP peer group by using the peer-group-name argument, all the
members of the peer group inherit the characteristic configured with this
command. You cannot override the characteristic for a specific member of the
peer group.
â– Example
host1(config-router-af)#neighbor 192.168.5.1 send-label
â– Use the no version to halt distribution of the MPLS label with route
advertisements.
â– See neighbor send-label.
OSPF and BGP/MPLS VPNs
Before reading this section, we recommend you be thoroughly familiar with OSPF.
For detailed information about that protocol, see JUNOSe IP, IPv6, and IGP
Configuration Guide.
You can use BGP/MPLS VPNs to connect OSPF domains without creating OSPF
adjacencies between the domains. The BGP/MPLS VPN backbone acts as either an
OSPF backbone (area 0) or an OSPF area above the backbone.
In this topology, OSPF is the routing protocol between the CE router and the PE
router. This OSPF link can be configured in area 0 or any other OSPF area. However,
if the customer site has any connections to area 0, then at least one OSPF router
configured on a CE router must have an area 0 link to a PE site. In this case, the
OSPF and BGP/MPLS VPNs â– 479
Chapter 5: Configuring BGP-MPLS Applications
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