LAN/DHCP Settings

DHCP setup configures the DHCP server for relay or Option 82 (DHCP relay agent information option) for LAN clients to obtain IP addresses. DHCP server maintains local pools and leases. It also allows LAN clients to connect to a remote server for obtaining IP address.

Option 82 enables a DHCP relay agent to include information about itself when forwarding client-originated DHCP packets to a DHCP server. The DHCP server can use this information to implement IP addressing or other parameter-assignment policies.

To configure the LAN/DHCP settings, follow these steps:

Procedure
    Step 1   Select LAN > LAN/DHCP Settings.
    Step 2   In the LAN/DHCP Settings Table click Add.
    Step 3   If you choose Interface, select a VLAN from the drop-down list and click Next.
    Step 4   To configure the DHCP for IPv4, select the DHCP type for IPv4.

    Disabled Disables the DHCP server for IPv4 on this device. There are no additional parameters to complete.
    Server The DHCP server assigns addresses to clients from their respective pools.
    Relay Sends the DHCP requests and replies from another DHCP server through the device. Enter the remote DHCP server IPv4 address to configure DHCP relay agent.

    Configuring DHCP for IPv4

    Step 5   Click Next and configure the following:
    Client Lease Time Amount of time (in minutes) that a network user is allowed to connect to the router with the current IP address. Valid values are 5 to 43,200 minutes. The default is 1440 minutes (equal to 24 hours).
    Range Start and Range End The range start and end of IP addresses that can be assigned dynamically. The range can be up to the maximum number of IP addresses that the server can assign without overlapping the PPTP and SSL VPN.
    DNS Server DNS service type; where the DNS server IP address is acquired.
    Static DNS 1 and Static DNS 2

    Static IP address of a DNS Server. (Optional) If you enter a second DNS server, the device uses the first DNS server to respond to a request.
    WINS Server Optional IP address of a Windows Internet Naming Service (WINS) server that resolves NetBIOS names to IP addresses. Default is 0.0.0.0.
    DHCP Options

    • Option 66 — Enter the IP address or the hostname of a single TFTP server.

    • Option 150 — Enter the IP addresses of a list of TFTP servers.

    • Option 67 — Enter the boot filename.
    Configuring DHCP type for IPv6
    Step 6   To configure the DHCP Mode for IPv6, enter the following:
    Disable Disables the DHCP on this device. There are no additional parameters to complete
    Server DHCP server that assigns addresses to clients from their respective pools.
    Step 7   Click Next and configure the following:
    Client Lease Time Amount of time that a network user is allowed to connect to the router with the current IP address. Enter the amount of time in minutes. Valid values are 5 to 43,200 minutes. Default is 1460 minutes (24 hours). For example, if the router uses the default LAN IP address, 192.168.1.1, the starting value must be 192.168.1.2 or greater.
    Range Start Starting address of the IPv6 address pool.
    Range End Ending address of the IPv6 address pool.
    DNS Server Type of DNS (server static), proxy, or the DNS server provided by your ISP.
    Static DNS1 and DNS2 (Optional) IP address of a DNS server. If you enter a second DNS server, the device uses the first DNS server to respond. Specifying a DNS server can provide faster access than using a DNS server that is dynamically assigned. Default is 0.0.0.0.

    Configuring Option 82 Circuit

    Step 8   To configure the Option 82 Circuit enter the following information.
    Description Enter description for option 82 client.
    Circuit ID Enhances the validation security to determine about the information which is provided in the Option 82 Circuit ID. Enter the circuit ID and its format.
    Step 9   Click Next and enter the following:
    IP Address & Subnet Mask Enter the IP address and subnet mask of the device.
    Step 10   Click Next.
    Step 11   To add a new DHCP Configuration, configure the following:
    Client Lease Time Amount of time that a network user is allowed to connect to the router with the current IP address. Enter the amount of time in minutes. Valid values are 5 to 3200 minutes. Default is 1460 minutes (24 hours).
    Range Start and Range End The range start and end of IP addresses that can be assigned dynamically. The range can be up to the maximum number of IP addresses that the server can assign without overlapping the PPTP and SSL VPN. For example, if the router uses the default LAN IP address, 192.168.1.1, the starting value must be 192.168.1.2 or greater.
    DNS Server DNS service type; where the DNS server IP address is acquired.
    Static DNS 1 and Static DNS 2 Static IP address of a DNS Server. (Optional) if you enter a second DNS server, the device uses the first DNS server to respond to a request.
    WINS Server Optional IP address of a Windows Internet Naming Service (WINS) server that resolves NetBIOS names to IP addresses. Default is 0.0.0.0.
    DHCP Options

    • Option 66 — Enter the IP address or the hostname of a single TFTP server.

    • Option 150 — Enter the IP addresses of a list of TFTP servers.

    • Option 67 — Enter the boot filename.
    Step 12   Click Ok, then click Apply.