Users Guide

To apply the access list, use the following command.
• Apply the access list.
INTERFACE mode
ip igmp access-group access-list-name
Dell Networking OS Behavior: Do not enter the ip igmp access-group command before creating the access-list. If you do, after
entering your rst deny rule, the Dell Networking OS clears the multicast routing table and re-learns all groups, even those not covered by
the rules in the access-list, because there is an implicit deny all rule at the end of all access-lists. Therefore, conguring an IGMP join
request lter in this order might result in data loss. If you must enter the ip igmp access-group command before creating the
access-list, prevent the Dell Networking OS from clearing the routing table by entering a permit any rule with a high sequence number
before you enter any other rules.
In the following example, virtual local area network (VLAN) 400 is congured with an access list to permit only IGMP reports for group
239.0.0.1. Though Receiver 2 sends a membership report for groups 239.0.0.1 and 239.0.0.2, a multicast routing table entry is created only
for group 239.0.0.1. VLAN 300 has no access list limiting Receiver 1, so both IGMP reports are accepted and two corresponding entries are
created in the routing table.
Figure 38. Preventing a Host from Joining a Group
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Internet Group Management Protocol (IGMP)