High Availability (Ha) Features For Mld; Bridge Domain Support For Mld; Multicast Router And Host Ports - Cisco ASR 9000 Series Configuration Manual

Implementing MLD Snooping
• With the use of some optional configurations, it provides security between bridge domains by filtering

High Availability (HA) features for MLD

MLD supports the following HA features:
• Process restarts
• RP Failover
• Stateful Switch-Over (SSO)
• Non-Stop Forwarding (NSF)—Forwarding continues unaffected while the control plane is restored
• Line card online insertion and removal (OIR)

Bridge Domain Support for MLD

MLD snooping operates at the bridge domain level. When MLD snooping is enabled on a bridge domain, the
snooping functionality applies to all ports under the bridge domain, including:
• Physical ports under the bridge domain.
• Ethernet flow points (EFPs)—An EFP can be a VLAN, VLAN range, list of VLANs, or an entire interface
• Pseudowires (PWs) in VPLS bridge domains.
• Ethernet bundles—Ethernet bundles include IEEE 802.3ad link bundles and Cisco EtherChannel bundles.

Multicast Router and Host Ports

MLD snooping classifies each port as one of the following:
• Multicast router ports (mrouter ports)—These are ports to which a multicast-enabled router is connected.
• Host ports—Any port that is not an mrouter port is a host port.
the MLD reports received from hosts on one bridge port and preventing leakage towards the hosts on
other bridge ports.
following a process restart or route processor (RP) failover.
port.
From the perspective of the MLD snooping application, an Ethernet bundle is just another EFP. The
forwarding application in the Cisco ASR 9000 Series Routers randomly nominates a single port from
the bundle to carry the multicast traffic.
Mrouter ports are usually dynamically discovered, but may also be statically configured. Multicast traffic
is always forwarded to all mrouter ports, except when an mrouter port is the ingress port.
Cisco ASR 9000 Series Aggregation Services Router Multicast Configuration Guide, Release 6.0.x
High Availability (HA) features for MLD
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