Cisco ASR 9000 Series Configuration Guidelines

receivers that are interested in receiving traffic for that stream. An Inclusive multicast tree in VPLS LSM is
a P2MP tree.
Selective trees—A Selective multicast tree is used by a PE to send IP multicast traffic for one or more specific
IP multicast streams, received by the PE over PE-CE interfaces that belong to the same or different VPLS
instances, to a subset of the PEs that belong to those VPLS instances. This is to provide a PE the ability to
create separate SP multicast trees for specific multicast streams, e.g. high bandwidth multicast streams. This
allows traffic for these multicast streams to reach only those PE routers that have receivers for these streams.
This avoids flooding other PE routers in the VPLS instance.
VPLS LSM Limitations
VPLS LSM has these limitations:
• Only BGP-AD signaling with RSVP-TE multicast trees are supported.
• Statically configured PWs are not supported.
• Only Inclusive trees are supported.
• Selective multicast trees are not supported.
• LDP signalled P2P PW is not supported. Only BGP signalled PWs are supported.
• Only RSVP-TE multicast trees are supported.
• If IGMP snooping is enabled in a bridge domain participating in the P2MP multicast tree root, IGMP
snooping traffic is forwarded using ingress replication. P2MP multicast trees are not used.
• P2MP PW signaling is initiated when P2MP is enabled in a VPLS domain. Therefore, it is possible that
one or more Leaf PEs are unable to join the multicast tree. In this scenario, the leaf PEs do not receive
traffic sent over the P2MP tree.
• Traffic is blackholed until Leaf PEs successfully join the multicast tree. Automatic recovery is not
supported.
• MAC learning occurs when unknown unicast traffic is sent on a P2MP multicast tree. As a result, traffic
is switched to a P2P PW. Packet reordering may occur as P2P and P2MP PWs potentially take different
paths through the network. Traffic, which is already in transit over P2MP, may arrive later than newer
traffic on P2P PW for the same flow.
• With respect to VPLS LSM, the A9K-SIP-700 Line Card has some specific limitations as follows:
• ISSU is not supported.
• QoS is not supported on Access-PW on this line card.
• MPLS-TE is not supported on serial interfaces.
• If TE or RSVP or both are configured, RSVP does not remove the interface and neighbors.
• Only FRR Link Protection is supported. FRR Node Protection is not supported.
• The maximum number of P2MP-enabled BD-VFI supported is 1000.
• To transition from Bud to Mid node, remove the entire l2vpn configuration using the no l2vpn
command. Configuring no multicast p2mp command is not enough.
L2VPN and Ethernet Services Configuration Guide for Cisco ASR 9000 Series Routers, IOS XR Release 6.3.x
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Implementing Multipoint Layer 2 Services
VPLS LSM Limitations

Cisco ASR 9000 Series Specifications

General

Series	ASR 9000
Category	Network Router
Modular Design	Yes
Redundancy	Yes (Hardware and Software)
Operating System	Cisco IOS XR
Interfaces/Ports	10G, 40G, 100G, 400G Ethernet
Expansion Slots	Varies by model
Routing Protocol	BGP, OSPF, IS-IS, EIGRP
Management	CLI, SNMP, NETCONF
Power Supply	Redundant
Port Density	Varies by model
Power Supply Options	AC, DC
Memory	Varies by model
Storage	Varies by model
Dimensions	Varies by model
Weight	Varies by model