Restrictions - Cisco ASR 9000 Series Configuration Manual

Implementing Layer-2 Multicast with IGMP Snooping
The IGMP snoop synchronization functionality is available for all the supported satellite hardware types in
5.2.2 release. This is also a prerequisite for faster convergence times in the case of nV multicast offload feature,
which is also introduced in 5.2.2 . For more information on nV Multicast Offload feature, see Cisco ASR 9000
Series Aggregation Services Router nV System Configuration Guide.
Note IGMP Snoop Synchronization is not supported in the cases, where hosts are of different endian types in
dual-homed system topology.

Restrictions

The following are the restrictions of the Bidirectional IGMP Snoop Synchronization feature on Satellite
Dual-Homed Systems feature:
• Synchronization is not supported on ASR9K chassis running RSP cards of different endian types.
• IGMP synchronization over BVI requires that the BVI must have a lower IP address than the
• Ambiguous VLAN ports are not supported with IGMP snoop synchronization functionality.
• The IGMP snoop configuration has to be manually synchronized on both the hosts for the synchronization
Information About IGMP Snooping Configuration Profiles
To enable IGMP snooping on a bridge domain, you must attach a profile to the bridge domain. The minimum
configuration is an empty profile. An empty profile enables the default configuration options and settings for
IGMP snooping, as listed in the
You can attach IGMP snooping profiles to bridge domains or to ports under a bridge domain. The following
guidelines explain the relationships between profiles attached to ports and bridge domains:
• Any IGMP profile attached to a bridge domain, even an empty profile, enables IGMP snooping. To
• An empty profile configures IGMP snooping on the bridge domain and all ports under the bridge using
• A bridge domain can have only one IGMP snooping profile attached to it (at the bridge domain level)
• Port profiles are not in effect if the bridge domain does not have a profile attached to it.
• IGMP snooping must be enabled on the bridge domain for any port-specific configurations to be in
• If a profile attached to a bridge domain contains port-specific configuration options, the values apply to
internal-querier, and the bridge domain is configured with an internal querier with the lowest possible
query max response time, that is, "query-max-response-time 1."
functionality to work as expected on the nV Satellite dual-homed systems.
Default IGMP Snooping Configuration Settings, on page
disable IGMP snooping, detach the profile from the bridge domain.
default configuration settings.
at any time. Profiles can be attached to ports under the bridge, one profile per port.
effect.
all of the ports under the bridge, including all mrouter and host ports, unless another port-specific profile
is attached to a port.
Cisco ASR 9000 Series Aggregation Services Router Multicast Configuration Guide, Release 6.0.x
Information About IGMP Snooping Configuration Profiles
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