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    Configuring Data MDTs

    To configure data MDTs:

    1. Configure a dynamic interface profile to specify the PIM configuration of the IP interface or MTI interface in the VRF.
      host1(config)#profile pe13DataMdtMti host1(config-profile)#ip virtual-router pe1:pe13 host1(config-profile)#ip unnumbered loopback 0 host1(config-profile)#ip pim sparse-mode host1(config-profile)#exit
    2. Configure a dynamic interface profile to specify the IP interface or MDT interface in the parent.
      host1(config-profile)#profile pe1DataMdtMdt host1(config-profile)#ip virtual-router pe1 host1(config-profile)#ip unnumbered loopback 0 host1(config-profile)#ip pim sparse-mode host1(config-profile)#exit
    3. Configure the destination profile for dynamic IP tunnel creation.
      host1(config)#gre destination profile pe13DataMdtProfile virtual-router pe1 host1(config-dest-profile)#tunnel source host1(config-dest-profile)#tunnel destination ip subnet host1(config-dest-profile)#tunnel mdt profile pe1DataMdtMdt host1(config-dest-profile)#profile pe13DataMdtMti host1(config-dest-profile)#exit

      The router uses this destination profile to verify whether it can create a dynamic tunnel, and to supply additional configuration parameters when it creates a tunnel. For more information about creating dynamic IP tunnels, see Configuring Dynamic IP Tunnels in the JunosE IP Services Configuration Guide.

    4. Configure the group address pools in the route map.
      host1(config)#virtual-router pe1 host1:pe1(config)#ip pim group-address-pool pe13DataMdtGroups

      If the data MDTs are established using ASM, you must divide the range of available MDT P-Group addresses so that PEs source VPN multicasts. All VRFs in a PE draw from a single address pool that contains the range of group addresses assigned to that PE.

      If the data MDTs are established using SSM, you can configure VRFs to transmit on a tunnel using the same MDT P-Group address. Each VRF transmits using a unique P-Source address; however, each data MDT created by the VRF must use a different P-Group address. There might be one sender data MDT and possibly many receiver data MDTs sharing an IP tunnel.

      For SSM, each PE can assign MDT P-Groups from the same range, but the P-Group addresses must be administratively divided among the VPNs as mentioned in the following example:

      host1(config)#virtual-router pe1 host1:pe1(config)#ip pim group-address-pool pe11DataMdtSSMGroups host1:pe1(config)#ip pim group-address-pool pe12DataMdtSSMGroups host1:pe1(config)#ip pim group-address-pool pe13DataMdtSSMGroups
    5. Configure the access list to match <S,G> and <*,G> entries.
      host1:pe1(config)#virtual-router pe1:pe13 host1:pe1:pe13(config)#access-list pe13DataMdtSend permit ip host host1:pe1:pe13(config)#access-list pe13DataMdt permit ip any
    6. Specify a route map to configure the set of <S, G> for which data MDTs can be created, and the threshold to be applied for each SG.
      host1:pe1:pe13(config)#route-map pe13MdtThresholds permit 10 host1:pe1:pe13(config-route-map)#match ip address pe13DataMdtSend host1:pe1:pe13(config-route-map)#set threshold 0 host1:pe1:pe13(config-route-map)#route-map pe13MdtThresholds permit 20 host1:pe1:pe13(config-route-map)#match ip address pe13DataMdt host1:pe1:pe13(config-route-map)#exit
    7. Configure the data MDT.
      host1:pe1:pe13(config)#ip pim data-mdt host1:pe1:pe13(config-ip-pim-data-mdt)#tunnel source host1:pe1:pe13(config-ip-pim-data-mdt)#tunnel group-address-pool pe13DataMdtG$ host1:pe1:pe13(config-ip-pim-data-mdt)#route-map pe13MdtThresholds

    Note: You can configure PIM on IPv4 and IPv6 interfaces. However, IPv6 does not support all PIM configuration options. For information about configuring PIM on IPv6 interfaces, see Unresolved xref.

    Published: 2014-08-19