Configure Optimization Replication

1. Configure the IP fabric.
2. On all fabric nodes, configure IP prefix-list for the Multicast Group address range you want to reserve and use with PIM-SSM to form MDT.
3. Enable the following:
   • Router PIM under default VRF
   • PIM-SSM with prefix-list
   

   ip prefix-list mdt-range seq 5 permit 239.0.0.0/8
   !
   router pim vrf default-vrf
   ssm-enable range mdt-range
   !

4. Enable PIM-SM on all Fabric links.
   

   interface Ethernet 0/6
   ip address 11.1.1.200/24
   ip pim-sparse
   no shutdown
   !

5. On all leaf nodes, enable Optimized-Replication under Overlay-Gateway with the default MDT group.
   If a separate MDT is required for an EVPN domain, the MDT group address can be assigned to the associated VLAN/BD.
   

   SLX# show running-config overlay-gateway
   overlay-gateway tunnel
   ip interface Loopback 1
   map vni auto
   optimized-replication
   underlay-mdt-default-group 239.1.1.1
   underlay-mdt-group 239.1.1.103 vlan add 300
   underlay-mdt-group 239.1.1.110 vlan add 110
   underlay-mdt-group 239.1.1.200 bridge-domain add 1
   !
   activate
   !

6. Optional: Remove Optimization Replication.
   

   # no optimized-replication

Example

# vlan 5
# vlan 6
# vlan 10
# vlan 11
# vlan 12
# vlan 20
# vlan 30
# vlan 40
# overlay-gateway 10
# type layer2-extension
# optimized-replication
# underlay-mdt-default-group 239.0.0.100 ! default MDT for all VNIs
# underlay-mdt-group 239.0.0.1 vlan add 10-12,20 ! shared MDT; but not the default
# underlay-mdt-group 239.0.0.3 vlan add 30 ! MDT dedicated to vlan 30
# underlay-mdt-group 239.0.0.4 vlan add 40
# underlay-mdt-group 239.0.0.5 bridge-domain add 50,60-70