Cisco 500 Series Administration Manual page 327

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STEP 4
STEP 5
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• MRouter Ports Auto Learn—Select to enable Auto Learn of the Multicast
router.
• Immediate Leave—Select to enable the switch to remove an interface that
sends a leave message from the forwarding table without first sending out
MAC-based general queries to the interface. When an IGMP Leave Group
message is received from a host, the system removes the host port from the
table entry. After it relays the IGMP queries from the Multicast router, it
deletes entries periodically if it does not receive any IGMP membership
reports from the Multicast clients. When enabled, this feature reduces the
time it takes to block unnecessary IGMP traffic sent to a device port.
• Last Member Query Counter—Number of IGMP group-specific queries
sent before the device assumes there are no more members for the group, if
the device is the elected querier.
• IGMP Querier Status—Select to enable this feature. This feature is required
if there is no Multicast router.
• IGMP Querier Election—Whether the IGMP querier election is enabled or
disabled. If the IGMP Querier election mechanism is enabled, the IGMP
Snooping querier supports the standard IGMP Querier election mechanism
specified in RFC3810.
If the IGMP Querier election mechanism is disabled, the IGMP Snooping
querier delays sending General Query messages for 60 seconds after it
was enabled, and if there is no other querier, it starts sending General Query
messages. It stops sending General Query messages when it detects
another querier. The IGMP Snooping Querier resumes sending General
Query messages if it does hear another querier for a Query Passive interval
that equals: Robustness * (Query Interval) + 0.5 * Query Response Interval.
• IGMP Querier Version— Select the IGMP version to be used if the device
becomes the elected querier. Select IGMPv3 if there are switches and/or
Multicast routers in the VLAN that perform source-specific IP Multicast
forwarding. Otherwise, select IGMPv2.
• Querier Source IP Address—Select the device source interface to be
used in messages sent. In MLD this address is selected automatically by
the system.
If the Auto option is selected, the system takes the source IP address
NOTE
from the IP address defined on the outgoing interface.
Select a VLAN, and click Edit.
Enter the parameters as described above.
Cisco 500 Series Managed Switch Administration Guide
Multicast
IPv4 Multicast Configuration