Multicast Forwarding
Querying IGMP/MLD IP Multicast Groups
Cisco 220 Series Smart Switches Administration Guide Release 1.1.0.x 173
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• MRouter Ports Auto Learn—Enable or disable auto learning of the Multicast
router.
• Query Robustness—Enter the robustness variable value to be used if the
switch cannot read this value from messages sent by the elected querier.
• Query Interval—Enter the query interval value to be used by the switch if
the switch cannot derive the value from the messages sent by the elected
querier.
• Query Max Response Interval—Enter the query maximum response delay
to be used if the switch cannot read the maximum response time value from
general queries sent by the elected querier.
• Last Member Query Counter—Enter the last member query count to be
used if the switch cannot derive the value from the messages sent by the
elected querier.
• Last Member Query Interval—Enter the maximum response delay to be
used if the switch cannot read maximum response time value from group-
specific queries sent by the elected querier.
• Immediate Leave—When enabled, reduces the time that it takes to block
unnecessary MLD traffic sent to a switch port.
STEP 6 Click Apply. The Running Configuration is updated.
Querying IGMP/MLD IP Multicast Groups
The IGMP/MLD IP Multicast Group page displays the IPv4 and IPv6 group
addresses that the switch learned from the IGMP/MLD messages that it snoops.
To query for an IP Multicast group:
STEP 1 Click Multicast > IGMP/MLD IP Multicast Group.
STEP 2 Enter the query criteria:
• VLAN ID equals to—Enter the VLAN ID to query.
• IP Version equals to—Select either Version 4 or Version 6.
• IP Multicast Group Address equals to—Enter the IP Multicast group
address to query.
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