User manual ZYXEL NBG-318S

[. . . ] NBG-318S Powerline Ethernet Series User's Guide Version 3. 60 6/2007 Edition 1 DEFAULT LOGIN IP Address http://192. 168. 1. 1 Password 1234 www. zyxel. com About This User's Guide About This User's Guide Intended Audience This manual is intended for people who want to configure the NBG-318S using the web configurator. You should have at least a basic knowledge of TCP/IP networking concepts and topology. Related Documentation · Quick Start Guide The Quick Start Guide is designed to help you get up and running right away. It contains information on setting up your network and configuring for Internet access. [. . . ] In cases where your computer is required to use a static IP address in another network, you may need to manually configure the network settings of the computer every time you want to access the Internet via the NBG-318S. With the Any IP feature and NAT enabled, the NBG-318S allows a computer to access the Internet without changing the network settings (such as IP address and subnet mask) of the computer, when the IP addresses of the computer and the NBG-318S are not in the same subnet. Whether a computer is set to use a dynamic or static (fixed) IP address, you can simply connect the computer to the NBG-318S and access the Internet. The following figure depicts a scenario where a computer is set to use a static private IP address in the corporate environment. In a residential house where a NBG-318S is installed, you can still use the computer to access the Internet without changing the network settings, even when the IP addresses of the computer and the NBG-318S are not in the same subnet. 100 NBG-318S User's Guide Chapter 7 LAN Figure 51 Any IP Example The Any IP feature does not apply to a computer using either a dynamic IP address or a static IP address that is in the same subnet as the NBG-318S's IP address. You must enable NAT to use the Any IP feature on the NBG-318S. Address Resolution Protocol (ARP) is a protocol for mapping an Internet Protocol address (IP address) to a physical machine address, also known as a Media Access Control or MAC address, on the local area network. IP routing table is defined on IP Ethernet devices (the NBG-318S) to decide which hop to use, to help forward data along to its specified destination. The following lists out the steps taken, when a computer tries to access the Internet for the first time through the NBG-318S. 1 When a computer (which is in a different subnet) first attempts to access the Internet, it sends packets to its default gateway (which is not the NBG-318S) by looking at the MAC address in its ARP table. 2 When the computer cannot locate the default gateway, an ARP request is broadcast on the LAN. 3 The NBG-318S receives the ARP request and replies to the computer with its own MAC address. 4 The computer updates the MAC address for the default gateway to the ARP table. Once the ARP table is updated, the computer is able to access the Internet through the NBG318S. 5 When the NBG-318S receives packets from the computer, it creates an entry in the IP routing table so it can properly forward packets intended for the computer. After all the routing information is updated, the computer can access the NBG-318S and the Internet as if it is in the same subnet as the NBG-318S. NBG-318S User's Guide 101 Chapter 7 LAN 7. 3 LAN IP Screen Use this screen to change your basic LAN settings. Click Network > LAN. Figure 52 Network > LAN > IP The following table describes the labels in this screen. Table 37 LABEL LAN TCP/IP IP Address IP Subnet Mask Type the IP address of your NBG-318S in dotted decimal notation 192. 168. 1. 1 (factory default). The subnet mask specifies the network number portion of an IP address. Your NBG-318S will automatically calculate the subnet mask based on the IP address that you assign. Unless you are implementing subnetting, use the subnet mask computed by the NBG-318S. Click Reset to begin configuring this screen afresh. Network > LAN > IP DESCRIPTION Apply Reset 7. 4 LAN IP Alias IP alias allows you to partition a physical network into different logical networks over the same Ethernet interface. The NBG-318S supports three logical LAN interfaces via its single physical Ethernet interface with the NBG-318S itself as the gateway for each LAN network. To change your NBG-318S's IP alias settings, click Network > LAN > IP Alias. The screen appears as shown. 102 NBG-318S User's Guide Chapter 7 LAN Figure 53 Network > LAN > IP Alias The following table describes the labels in this screen. Table 38 LABEL IP Alias 1, 2 IP Address IP Subnet Mask Network > LAN > IP Alias DESCRIPTION Select the check box to configure another LAN network for the NBG-318S. [. . . ] 2 Select your product on the ZyXEL home page to go to that product's page. 272 NBG-318S User's Guide Appendix G Legal Information 3 Select the certification you wish to view from this page. ZyXEL Limited Warranty ZyXEL warrants to the original end user (purchaser) that this product is free from any defects in materials or workmanship for a period of up to two years from the date of purchase. During the warranty period, and upon proof of purchase, should the product have indications of failure due to faulty workmanship and/or materials, ZyXEL will, at its discretion, repair or replace the defective products or components without charge for either parts or labor, and to whatever extent it shall deem necessary to restore the product or components to proper operating condition. Any replacement will consist of a new or re-manufactured functionally equivalent product of equal or higher value, and will be solely at the discretion of ZyXEL. This warranty shall not apply if the product has been modified, misused, tampered with, damaged by an act of God, or subjected to abnormal working conditions. [. . . ]