D-Link DGS-6600-48T Product Manual - Page 269

DGS-6604 ip igmp query-interval ip igmp query-interval Use this command to configure the interval at which the router sends IGMP general-query messages periodically. ip igmp query-interval SECONDS Syntax Description SECONDS Configure the frequency at which the designated router sends IGMP generalquery messages. By default, the designated router sends IGMP general-query messages every 125 seconds to keep the IGMP overhead very low on the hosts and networks. The range is 1 to 31744. Default Command Mode Usage Guideline Example 125 seconds VLAN interface configuration This command is for use on the VLAN interface only. Use this Interface configuration command for modifying IGMP Group Member Query Interval on an interface. The IGMP querier sends IGMP membership query messages at the interval specified by the ip igmp query-interval command to discover which multicast groups have members on the attached networks of the router. Hosts respond with IGMP report messages indicating that they want to receive multicast packets for specific groups (that is, indicating that the host wants to become a member of the group). IGMP query messages are addressed to the all-hosts multicast group, which has the address 224.0.0.1, and has an IP time-to-live (TTL) value of 1. The igmp query-interval is also used for igmp snooping as IGMP is disabled but igmp snooping is enabled at the interface. This example shows how to configure the IGMP query interval to 300 seconds on interface VLAN 1000. Switch# configure terminal Switch(config)# interface vlan1000 Switch(config-if)# ip igmp query-interval 300 Switch(config-if)# end Verify the settings by entering the show ip igmp interface command. CLI Reference Guide 259