ZyXEL ZyWALL 5 User Guide - Page 188
WAN Screens, ZyWALL 5/35/70 Series User's Guide, NETWORK > WAN > WAN PPPoE
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Chapter 9 WAN Screens Table 43 NETWORK > WAN > WAN (PPPoE Encapsulation) (continued) LABEL DESCRIPTION Nailed-Up Select Nailed-Up if you do not want the connection to time out. Idle Timeout This value specifies the time in seconds that elapses before the ZyWALL automatically disconnects from the PPPoE server. WAN IP Address Assignment Get automatically from ISP Select this option If your ISP did not assign you a fixed IP address. This is the default selection. Use Fixed IP Address Select this option If the ISP assigned a fixed IP address. My WAN IP Address Enter your WAN IP address in this field if you selected Use Fixed IP Address. Advanced Setup Enable NAT (Network Address Translation) Network Address Translation (NAT) allows the translation of an Internet protocol address used within one network (for example a private IP address used in a local network) to a different IP address known within another network (for example a public IP address used on the Internet). Select this checkbox to enable NAT. For more information about NAT see Chapter 22 on page 435. RIP Direction RIP (Routing Information Protocol) allows a router to exchange routing information with other routers. The RIP Direction field controls the sending and receiving of RIP packets. Choose Both, None, In Only or Out Only. When set to Both or Out Only, the ZyWALL will broadcast its routing table periodically. When set to Both or In Only, the ZyWALL will incorporate RIP information that it receives. When set to None, the ZyWALL will not send any RIP packets and will ignore any RIP packets received. By default, RIP Direction is set to Both. RIP Version The RIP Version field controls the format and the broadcasting method of the RIP packets that the ZyWALL sends (it recognizes both formats when receiving). Choose RIP-1, RIP-2B or RIP-2M. RIP-1 is universally supported; but RIP-2 carries more information. RIP-1 is probably adequate for most networks, unless you have an unusual network topology. Both RIP-2B and RIP-2M sends the routing data in RIP-2 format; the difference being that RIP-2B uses subnet broadcasting while RIP-2M uses multicasting. Multicasting can reduce the load on non-router machines since they generally do not listen to the RIP multicast address and so will not receive the RIP packets. However, if one router uses multicasting, then all routers on your network must use multicasting, also. By default, the RIP Version field is set to RIP-1. Enable Multicast Select this check box to turn on IGMP (Internet Group Management Protocol). IGMP is a network-layer protocol used to establish membership in a Multicast group - it is not used to carry user data. Multicast Version Choose None (default), IGMP-V1 or IGMP-V2. IGMP (Internet Group Management Protocol) is a session-layer protocol used to establish membership in a Multicast group - it is not used to carry user data. 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 inter-operability between IGMP version 2 and version 1, please see sections 4 and 5 of RFC 2236. 188 ZyWALL 5/35/70 Series User's Guide