Multicast Irb; Supported Bridge Port Types; Restrictions; Multicast Support For Pw-He Interfaces - Cisco ASR 9000 Series Configuration Manual

Implementing Layer-3 Multicast Routing on Cisco IOS XR Software

Multicast IRB

Multicast IRB provides the ability to route multicast packets between a bridge group and a routed interface
using a bridge-group virtual interface (BVI). It can be enabled with multicast-routing. THE BVI is a virtual
interface within the router that acts like a normal routed interface. For details about BVI, refer Cisco ASR 9000
Series Aggregation Services Router Interface and Hardware Component Configuration Guide
BV interfaces are added to the existing VRF routes and integrated with the replication slot mask. After this
integration, the traffic coming from a VRF BVI is forwarded to the VPN.

Supported bridge port types

• Bundles
• Satellites
• EFPs (physical, vlans, etc)
• Pseudowires

Restrictions

• Supported only on Ethernet line cards and enhanced ethernet line cards.
• Support only for IPv4
• Supports IGMP snooping
Multicast IRB
The CE-PE is collapsed into 1 router (IRB) and IGMP snooping is enabled on the BVIs.
BVI type is included in a multicast VRF. After the BVI slot mask is included in the VRF route slot mask, the
traffic from the VRF BVI is forwarded to the VPN/ core.

Multicast support for PW-HE interfaces

Multicast support for Pseudowire Head-end (PW-HE) interfaces is available only on the enhanced ethernet
cards.
Multicast support is available under these circumstances:
• IPv4 and IPv6 multicast traffic forwarding over the L3 PW-HE interface/sub-interface. PW-HE interface
• L3 PW-HE interfaces/sub-interfaces in global , MVPNv4 and MVPNv6 VRFs.
• L3 PW-HE interface/sub-interfaces in MVPNv4 and MVPNv6 where the core can be GRE or MLDP.
• PIM-SM, PIM-SSM (PE-CE) , MSDP and PIM Auto-RP over the PW-HE interface.
• IGMP/ MLD snooping on L2 PW-HE VC5 sub-interface.
type can be PW-ether (VC4 or VC5) or PW-iw (VC11). IPv6 multicast is not available on VC11.
Cisco ASR 9000 Series Aggregation Services Router Multicast Configuration Guide, Release 6.0.x
Multicast IRB
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