Allied Telesis AT-AR236E manual Configuring the LAN, Enable/Disable Dhcp

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4.5Configuring the LAN

By default, your ADSL Router has DHCP server (LAN side) enabled. If you already have a DHCP server running on your network, you must disable one of the two DHCP servers; if you plug a second DHCP server into the network, you will experience network errors and the network will not function normally.

4.5.1 Enable/Disable DHCP

To enable or disable DHCP, Click setup. Under LAN Setup, select DHCP Configuration. This will bring up the screen shown in Figure 10.

The Start IP Address is where the DHCP server starts issuing IP addresses. This value must be greater than the ADSL Router IP address value. For example if the ADSL Router IP address is 192.168.1.1 (default) than the starting IP address must be 192.168.1. 2 (or higher).

The End IP Address is where the DHCP server stops issuing IP addresses. The ending address cannot exceed a subnet limit of 254. Hence the max value for our default gateway is 192.168.1.254. If the DHCP server runs out of DHCP addresses, users will not get access to network resources. If this happens you can increase the Ending IP address (to the limit of 255) or reduce the lease time.

The Lease Time is the amount of time a network user will be allowed connection to the ADSL Router with their current dynamic IP address. The amount of time is in units of minutes; the default value is 3600 minutes (60 hours).

Note: If you change the start or end values, make sure the values are still within the same subnet as the gateways IP address. In other words, if the gateways IP address is 192.168.1.1 (default) and you change the DHCP start/end IP addresses to be 192.128.1.2/192.128.1.100, you will not be able to communicate to the ADSL Router if your PC has DHCP enabled.

Figure 10 (DHCP Server configuration)

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Contents Web Interface User’s Guide Wide Area Network connection Local Area Network connection Features IntroductionManagement Support Your gateway at a glance Ports and buttonsLED description Installing your Adsl Router Setting up your Adsl Router Log into your Adsl RouterQuick Start Quick StartSetup for advance user Wide Area Network connectionLocal Area Network connection Configuring the WAN New ConnectionBridged gateway profile and Connection PPPoA Connection Setup Page PPPoE Connection Setup Dhcp Connection Setup Static Connection Setup Page Modem setup Modify an Existing ConnectionConfiguring the LAN Enable/Disable DhcpChanging the Adsl Router IP address Static IP address assignmentFirewall/NAT Services Advanced for advance user only UPnPPort Forwarding DMZ configuration Advanced SecurityEnable Remote Telnet Access ControlEnable Web from WAN Enable Incoming Icmp PingMAC Address Filters MAC FiltersMulticast MulticastStatic Routing Dynamic Routing System Commands ToolsUser Management Update Firmware Ping Test Modem TestStatus System Log Appendix a Troubleshooting Adsl Router is not functionalCan’t connect to the Adsl Router DSL Link LED continues to blink but does not go solid DSL Link LED is always offWhat is a firewall? Adsl Router terms