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IC36240 User's Manual - Asante

IC36240 User's Manual - Asante

The following example

The following example shows output from creating a new VLAN (4) with the name Asante and assigning it to port 7. To remove a VLAN from an associated port follow these steps: 1. Click the membership check box of the desired port to deselect the association. 2. Click on the Remove unchecked member button. 9.8 IGMP Configuration The Internet Group Management Protocol (IGMP) manages the multicast groups on a LAN. IP hosts use IGMP to report their group membership to directly connected multicast switches. Switches executing a multicast routing protocol maintain forwarding tables to forward multicast datagrams. Switches use the IGMP to learn whether members of a group are present on their directly attached sub-nets. Hosts join multicast groups by sending IGMP report messages. IGMP uses group addresses, which are Class D IP addresses. The high-order four bits of a Class D address are 1110. Therefore, host group addresses can be in the range 224.0.0.0 to 239.255.255.255. The address 224.0.0.0 will not be assigned to any group. The address 224.0.0.1 is assigned to all systems on a subnet. The address 224.0.0.2 is assigned to all switches on a sub-net. Multicast switches elect a designated switch for the LAN (subnet). The designated switch is the one with the highest IP address. The switch is responsible for sending IGMP host-query messages to all hosts on the LAN. By default, the designated switch sends IGMP host-query messages every 60 seconds in order to keep the IGMP overhead on hosts and networks very low. 92 Asante IntraCore IC36240 User’s Manual

To access the IGMP configuration screen click on the IGMP button in the menu bar on the left side of the screen. The following example shows the IGMP main screen. Use this screen to view the IGMP information. To enable or disable IGMP on a specific VLAN by entering the VLAN ID number selecting the desired state and clicking apply. Click on the VLAN ID number access the advanced IGMP configuration screen. Follow these steps to enable or disable the transmit query packet status 1. Enter the VLAN ID number 2. Select enable or disable from the drop down menu 93 Asante IntraCore IC36240 User’s Manual

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