D-Link DGS-3308FG Product Manual - Page 175

8-port Gigabit Ethernet Switch User's Guide • Switch IGMP Snooping - This enables or disables IGMP snooping on the Switch. • Querier State - Select the version number of the IGMP to be used for the IP interface from the drop-down list. • Query Interval - The time (in seconds) between the transmission of IGMP query packets. • Max Response - The maximum number of respondents to an IGMP query. Range is between 1 and 25. • Robustness Variable - This is a tuning variable to allow for sub-networks that are expected to lose a large number of packets. A value between 2 and 255 can be entered, with larger values being specified for subnetworks that are expected to lose larger numbers of packets. Multicast Interface Configuration The following window is used to configure a multicast interface (Layer 3 mode only). Figure 7-28. Multicast Interface Configuration screen Items on the screen above include: • Interface Name - The name of the IP interface (previously defined) on the Switch for which a multicast interface is to be configured. • IP Address - The IP address (sometimes referred to as a network address) that corresponds to the interface name above. • IGMP - Allows IGMP to be Enabled or Disabled for the IP interface. • Protocol - Allows the selection of the multicast routing protocol to be used with the above IP interface. The options are: DVMRP - Distance Vector Multicast Routing Protocol, PIMDM - Protocol Independent Multicasting Dense Mode, and INACT - the interface is inactive. For example, if DVMRP is chosen, then this routing protocol will be used to forward multicast packets for the above IP interface. IGMP Interface Configuration The following window is used to configure Internet Group Management Protocol (IGMP) on the Switch (Layer 3 mode only). 165