User manual SMC SMC7904WBRAS-N2 V2

[. . . ] USER GUIDE ADSL2 BARRICADETM N 4-Port ADSL/ADSL2+ Wireless Router SMC7904WBRAS-N2 v2 4-Port ADSL/ADSL2+ Wireless Router User Guide No. # 149xxxxxxxxx SMC-UG-0312-01 Information furnished by SMC Networks, Inc. However, no responsibility is assumed by SMC for its use, nor for any infringements of patents or other rights of third parties which may result from its use. No license is granted by implication or otherwise under any patent or patent rights of SMC. [. . . ] IPv6 Address Pool -- The address range available for DHCPv6 assignment. Prefix Length -- The length of the IPv6 address prefix sent in DHCPv6 assignments. Preferred Time -- The time over which assigned addresses are preferred. DNS Servers -- Specifies up to three IPv6 Domain Name servers for IPv6 addresses. DHCP SETTINGS The ADSL Router includes a Dynamic Host Configuration Protocol (DHCP) server that can assign temporary IP addresses to any attached host requesting the service, as well as a DHCP relay serivce that will route the DHCP service to other subnets than that of the unit. DHCP DISABLED By selecting "None, " you can disable DHCP on the ADSL Router. Figure 36: DHCP Disabled The following items are displayed on this page: DHCP Mode -- When set to "None, " disables DHCP on the unit. ­ 76 ­ CHAPTER 6 | LAN Settings DHCP Settings DHCP RELAY Dynamic Host Configuration Protocol (DHCP) can dynamically allocate an IP address and other configuration information to network clients that broadcast a request. To receive the broadcast request, the DHCP server would normally have to be on the same subnet as the client. However, when the access point's DHCP relay agent is enabled, received client requests can be forwarded directly by the access point to a known DHCP server on another subnet. Responses from the DHCP server are returned to the access point, which then broadcasts them back to clients. Figure 37: DHCP Relay The following items are displayed on this page: DHCP Mode -- When set to "DHCP Relay, " enables routing of the DHCP service to units on a different subnet. Relay Server -- Enter the address of the DHCP server for routing to other units. ­ 77 ­ CHAPTER 6 | LAN Settings DHCP Settings DHCP SERVER The unit can support up to 253 local clients. Addresses are assigned to clients from a common address pool configured on the unit. Be sure not to include the unit's IP address in the address pool range. Figure 38: DHCP Server The following items are displayed on this page: LAN IP Address -- Displays the LAN IP address for management of the ADSL Router. (Default: 192. 168. 2. 1. ) Subnet Mask -- Displays the local subnet mask. (Default: 255. 255. 255. 0) DHCP Mode -- When set to "DHCP Server, " enables the ADSL Router to act as a DHCP server. Interface -- Selects either the RJ-45 LAN ports, or wireless interfaces. IP Pool Range -- Configures the IP address pool for the DHCP server and determines how many IP addresses can be assigned. NOTE: Do not enter the ADSL Router's LAN IP address as part of the IP Pool range. Default Gateway -- Specifies the gateway address through which traffic is routed from. Usually the LAN IP address of the ADSL Router ­ 78 ­ CHAPTER 6 | LAN Settings DHCP Settings MAX Lease Time -- Select a time limit for the use of an IP address from the IP pool. When the time limit expires, the client has to request a new IP address. (Default: 86400 seconds; Range: 60~86400 seconds; -1 indicates an infinite lease time) Domain Name -- Specifies the unique name used to identify the ADSL Router on the network. Set VendorClass IP Range -- Click on this option to assign IP address ranges to specific device types. Device Name -- Describes the device type. Start/End Address -- Specifies the IP addresses from the DHCP IP pool to assign to this device type. Router Address -- Specifies a default router IP address to use for traffic from this device. Option 60 -- Specifies the DHCP Option 60 vendor class identifier that indicates the device type. Figure 39: Device IP Range Table ­ 79 ­ CHAPTER 6 | LAN Settings DHCP Settings DHCP STATIC IP Assigns a physical MAC address to the DHCP pool by mapping it to a corresponding IP address. Figure 40: DHCP Static IP Assignment The following items are displayed on this page: IP Address -- Enter the IP address from the DHCP address pool to assign to the specified MAC address. [. . . ] HTTP Hypertext Transfer Protocol: HTTP is a standard used to transmit and receive all data over the World Wide Web. ISP Internet Service Provider. A company that provides access to the Internet. This may be your local telephone company, or a dedicated Internet service company. ­ 151 ­ GLOSSARY ITU International Telecommunication Union ITU-T Telecommunication Standardization Section of ITU LAN Local Area Network: A group of interconnected computers and support devices. MAC ADDRESS The physical layer address used to uniquely identify network nodes. MTU should be set to a value that minimizes unnecessary fragmentation and maximizes the transfer of large sequential data streams. NTP Network Time Protocol: NTP provides the mechanisms to synchronize time across the network. The time servers operate in a hierarchical-masterslave configuration in order to synchronize local clocks within the subnet and to national time standards via wire or radio. PING A utility used to determine whether a specific IP address is accessible. [. . . ]