Cisco 350 Series Administration Manual page 354

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STEP 3
NOTE
STEP 1
272
- User Defined—Enter a user-defined value.
• 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 from the IP
NOTE
address defined on the outgoing interface.
Click Apply. The Running Configuration file is updated.
Changes in IGMP Snooping timers configuration, such as: Query Robustness, Query Interval
etc. do not take effect on timers which already created.
IGMP Interface Settings
An interface that is defined as a Multicast router port receives all IGMP packets (reports and
queries) as well as all Multicast data.
To define IGMP on an interface:
Click Multicast > IPv4 Multicast Configuration > IGMP Interface Settings.
The following fields are displayed for each interface on which IGMP is enabled:
• Interface Name—Interface on which IGMP snooping is defined.
• Router IGMP Version—IGMP version.
Cisco 350, 350X and 550X Series Managed Switches, Firmware Release 2.4, ver 0.4
Multicast
IPv4 Multicast Configuration