129Local Management: Overview, Setup, and NavigationIGMP/VLAN Configuration ScreenThe IGMP/VLAN Configuration Screen, Figure 43, allows the user to enable ordisable IGMP (Internet Group Management Protocol, RFC 2236) on selectedVLANs, or globally on all VLANs that are available.IGMP provides a solution for handling multicast streams in layer 2 switchingdevices. IGMP is for hosts on multi-access networks to inform locally attachedswitches of their Multicast group membership information. This is performed byhosts multicasting IGMP Host Membership Reports. Multicast switches listen forthese messages and then pass them to routers. This allows distribution trees to beformed to deliver multicast datagrams.Information from the IGMP packets is used to send the multicast stream only tothe end stations that request it. IGMP is enabled or disabled by VLAN, not port-by-port.The following multicast routing protocols are transparently supported and areused only to detect the location of routers.:• DVMRP (Distance Vector Multicast Routing Protocol, RFC 1075)• PIM (Protocol Independent Multicast) version 1 and 2• CBT (Core Based Trees)• MOSPF (Multicast OSPF, RFC 1583)Figure 43. IGMP/VLAN Configuration ScreenSmartSwitch 9000 Local ManagementIGMP/Vlan ConfigurationModule Name: 9H531-24 Firmware Revision: 01.00.00Slot Number: 11 BOOTPROM Revision: 01.00.00Configuration Statistics------------- ----------IGMP Version: [ 2 ] Querier Address: 0.0.0.0Query Interval: 120 Querier Uptime: 0 D 0 H 0 MQuery Response Time: 10 Querier Expire Time: 24500 SInterface Robustness: 2Last Member Query Interval: 10VLAN ID: [ 1]IGMP State: [ DISABLED ]Default for new VLANS: [ DISABLED ]SAVE EXIT RETURN
