Default Igmp Snooping Configuration; Igmp Snooping Configuration Guidelines And Restrictions - Cisco WS-SUP32-GE-3B - Supervisor Engine 32 Software Configuration Manual

Chapter 27 Configuring IGMP Snooping for IPv4 Multicast Traffic
Explicit Host Tracking
IGMPv3 supports explicit tracking of membership information on any port. The explicit-tracking
database is used for fast-leave processing for IGMPv3 hosts, proxy reporting, and statistics collection.
When explicit tracking is enabled on a VLAN, the IGMP snooping software processes the IGMPv3
report it receives from a host and builds an explicit-tracking database that contains the following
information:
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Default IGMP Snooping Configuration

Table 27-3
Table 27-3
Feature
IGMP snooping querier
IGMP snooping
Multicast routers
IGMPv3 proxy reporting
IGMP snooping router learning
method
Fast-Leave Processing
IGMPv3 Explicit Host Tracking

IGMP Snooping Configuration Guidelines and Restrictions

When configuring IGMP snooping, follow these guidelines and restrictions:
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OL-11439-03
The port connected to the host
The channels reported by the host
The filter mode for each group reported by the host
The list of sources for each group reported by the hosts
The router filter mode of each group
For each group, the list of hosts requesting the source
Turning off explicit host tracking disables fast-leave processing and proxy reporting.
When explicit tracking is enabled and the switch is working in proxy-reporting mode, the router may
not be able to track all the hosts behind a VLAN interface.
shows the default IGMP snooping configuration.
IGMP Snooping Default Configuration
To support Cisco Group Management Protocol (CGMP) client devices, configure the PISA as a
CGMP server. Refer to the Cisco IOS IP Configuration Guide, Release 12.2, "Configuring IP
Multicast Routing," at this URL:
http://www.cisco.com/en/US/docs/ios/12_2/ip/configuration/guide/1cfmulti.html
Catalyst Supervisor Engine 32 PISA Cisco IOS Software Configuration Guide, Release 12.2ZY
Default Values
Disabled
Enabled
None configured
Enabled
Learned automatically through PIM or IGMP packets
Disabled
Enabled
Default IGMP Snooping Configuration
27-7