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Cisco ASR 1000 Series Aggregation Services Routers Software Configuration Guide
OL-16506-17
Chapter 18 LSM-MLDP-based MVPN Support
For more information, see MPLS Traffic Engineering (TE) - Fast Reroute (FRR) Link and Node
Protection.
Configuring MLDP with PIM-based MVPN
MLDP with PIM-based MVPN supports MLDP coexistence with a PIM-based MVPN deployment.
Using this feature, you can gradually introduce MLDP in an existing PIM-based MVPN environment,
facilitating phased migration towards a complete LSM-based MVPN network infrastructure. If both the
MLDP-based MVPN and GRE-based MVPN are configured, MDT selects PIM based MVPN by default.
Configure the precedence for MLDP MVPN and PIM based MVPN using the mdt preference option1
option2 command. This example sets MLDP MVPN precedence over PIM based MVPN:
Router(config-vrf)# mdt preference MLDP pim
MLDP Support with Load Balancing
MLDP supports load balancing of multicast traffic with Equal Cost Multipath (ECMP) links. For Load
balancing to work with MLDP, use the disable mpls MLDP forwarding recursive command, which is
enabled by default. Also, ensure that the mpls MLDP path multipath command is enabled for load
balancing to function as expected.
Root Node Redundancy
Configure multiple root nodes in the network using the mdt default mpls MLDP ip_address command.
The control plane builds a corresponding tree with root at the configured node to enable efficient
forwarding. A node in the network selects the nearest root for optimal bandwidth usage. Also, in case a
root node is unreachable (due to link failure, or router crash), the node switches to the next available root.
This example describes the root node redundancy configuration:
Router(config)# ip vrf blue1
Router(config-if)# rd 10:3
Router(config-if)# vpn id 10:3
Router(config-vrf)# route-target import 10:3
Step 3
ip multicast mpls traffic-eng [range
{access-list-number |
access-list-name}]
Example:
Router(config)# ip multicast mpls
traffic-eng
Enables IP multicast traffic on a tail end router enabled
with MPLS TE P2MP functionality.
Step 4
mpls MLDP path traffic-eng
Example:
Router(config)# mpls MLDP path
traffic-en
Configures MLDP to use traffic-eng tunnels.
Step 5
end
Example:
Router(config)# end
Closes the configuration session.
Command Purpose