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    Configuring a PE Router to Provide BGP VPN Services

    To configure a PE router to provide BGP VPN services:

    1. Configure PE-to-PE LSPs.

      See Unresolved xref, for information about configuring LSPs.

    2. Enable BGP routing.
      host1:vr1(config)#router bgp 100
    3. (Optional) Disable automatic route-target filtering.
      host1:vr1(config-router)#no bgp default route-target filter
    4. Configure PE-to-PE BGP sessions.
      1. Create the PE-to-PE session.
        host1:vr1(config)#router bgp 100 host1:vr1(config-router)#neighbor 192.168.1.158 remote-as 100
      2. Create the VPN-IPv4 address family.
        host1:vr1(config-router)#address-family vpnv4
      3. Activate the PE-to-PE session in the VPN-IPv4 address family.
        host1:vr1(config-router-af)#neighbor 192.168.1.158 activate host1:vr1(config-router-af)#exit-address-family
      4. (Optional) Enable the BGP speaker to check the reachability of indirect next hops when selecting the best VPN-IPv4 route to a prefix.
        host1:pe1(config-router-af)#check-vpn-next-hops
    5. Configure PE-to-CE BGP sessions.
      1. Enable and configure BGP:
        host1:vr1(config)#router bgp 100

        See Unresolved xref, for more information about configuring BGP.

      2. Specify the IPv4 unicast address family for each VRF:
        host1:vr1(config-router)#address-family ipv4 unicast vrf vrfA
      3. Configure the method of route advertisement by doing one of the following:
        • Use neighbor commands to specify peers to which BGP advertises the routes:
          host1:vr1(config-router)#neighbor 10.12.13.0 remote-as 200
        • Use network commands or the redistribute static command to make BGP advertise static routes to customers.
          host1:vr1(config-router)#network 10.3.0.0 mask 255.255.0.0 host1:vr1(config-router)#redistribute static
        • Use redistribute commands to make BGP advertise IGP routes to customers.
          host1:vr1(config-router)#redistribute ospf
    6. (Optional) Configure an AS override.

      See Example: Using a Single AS Number for All CE Sites for examples.

    7. (Optional) Force the BGP speaker to accept routes that have the speaker’s AS number in its AS path.
      host1:vr1(config-router)#bgp enforce-first-as

    See Creating Multicast VPNs in JunosE Multicast Routing Configuration Guide.

    Published: 2014-08-18