Cisco SX350 Series Administration Manual page 333

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STEP 2
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To configure IGMP on an interface, select a static VLAN and click Edit. Enter the following
fields:
• IGMP Snooping Status—Select to enable IGMP Snooping on the VLAN. The device
monitors network traffic to determine which hosts have asked to be sent Multicast
traffic. The device performs IGMP snooping only when IGMP snooping and Bridge
Multicast filtering are both enabled.
• 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 MLD group-specific queries sent before
the device assumes there are no more members for the group, if the device is the elected
querier.
- Use Query Robustness (x)—This value is set in
number in parentheses is the current query robustness value.
- 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.
Cisco Sx350, SG350X, SG350XG, Sx550X & SG550XG Series Managed Switches, Firmware Release 2.2.5.x
IPv4 Multicast Configuration
MLD VLAN Settings page. The
Multicast