ZyXEL NBG-460N User Guide - Page 138
Router Mode, Table 48
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Chapter 8 WAN Table 48 Network > WAN > Advanced LABEL DESCRIPTION Enable Auto-bridge mode Select this option to have the NBG-460N switch to bridge mode automatically when the NBG-460N gets a WAN IP address in the range of 192.168.x.y (where x and y are from zero to nine) no matter what the LAN IP address is. Note: The NBG-460N automatically turns back to Router Mode when the NBG-460N gets a WAN IP address that is not in the 192.168.x.y range. Apply Reset Clear this check box if you are playing IPTV as the NBG-460N needs to be in Router Mode for the IPTV STB port to work. Click Apply to save your changes back to the NBG-460N. Click Reset to begin configuring this screen afresh. 8.6 Technical Reference The following section contains additional technical information about the NBG460N features described in this chapter. 8.6.1 IGMP IGMP version 2 (RFC 2236) is an improvement over version 1 (RFC 1112) but IGMP version 1 is still in wide use. If you would like to read more detailed information about interoperability between IGMP version 2 and version 1, please see sections 4 and 5 of RFC 2236. The class D IP address is used to identify host groups and can be in the range 224.0.0.0 to 239.255.255.255. The address 224.0.0.0 is not assigned to any group and is used by IP multicast computers. The address 224.0.0.1 is used for query messages and is assigned to the permanent group of all IP hosts (including gateways). All hosts must join the 224.0.0.1 group in order to participate in IGMP. The address 224.0.0.2 is assigned to the multicast routers group. 138 NBG-460N User's Guide