Subnet Mask  | Type in an address code that determines the size of the network.  | 
  | (Default: 255.255.255.0/ 24)  | 
Enable DHCP | DHCP stands for Dynamic Host Configuration Protocol. The  | 
  | router by factory default acts a DHCP server for your network  | 
  | so it automatically dispatch related IP settings to any local user  | 
  | configured as a DHCP client. It is highly recommended that you  | 
  | leave the router enabled as a DHCP server if you do not have a  | 
  | DHCP server for your network.  | 
  | You can configure the router to serve as a DHCP server for the  | 
  | 2nd subnet. Check the box to enable DHCP server setting.  | 
Start IP Address | Enter a value of the IP address pool for the DHCP server to start  | 
  | with when issuing IP addresses. If the 2nd IP address of your  | 
  | router is 220.135.240.1, the starting IP address must be  | 
  | 220.135.240.2 or greater, but smaller than 220.135.240.254.  | 
IP Pool Counts | Enter the number of IP addresses in the pool. The maximum is  | 
  | 10. For example, if you type 3 and the 2nd IP address of your  | 
  | router is 220.135.240.1, the range of IP address by the DHCP  | 
  | server will be from 220.135.240.2 to 220.135.240.11.  | 
Lease Time  | It allows you to set the leased time for the specified PC.  | 
Force DNS manual setting | Force router to use DNS servers in this page instead of DNS  | 
  | servers given by the Internet Access server (PPPoE, PPTP,  | 
  | L2TP or DHCP server).  | 
Primary IP Address | You must specify a DNS server IP address here because your  | 
  | ISP should provide you with usually more than one DNS Server.  | 
  | If your ISP does not provide it, the router will automatically  | 
  | apply default DNS Server IP address: 194.109.6.66 to this field.  | 
Secondary IP Address | You can specify secondary DNS server IP address here because  | 
  | your ISP often provides you more than one DNS Server. If your  | 
  | ISP does not provide it, the router will automatically apply  | 
  | default secondary DNS Server IP address: 194.98.0.1 to this  | 
  | field.  | 
  | The default DNS Server IP address can be found via Online  | 
  | Status:  | 
  | If both the Primary IP and Secondary IP Address fields are left  | 
  | empty, the router will assign its own IP address to local users as  | 
  | a DNS proxy server and maintain a DNS cache.  | 
  | If the IP address of a domain name is already in the DNS cache,  | 
  | the router will resolve the domain name immediately. Otherwise, | 
  | the router forwards the DNS query packet to the external DNS  | 
  | server by establishing a WAN connection.  | 
After finishing all the settings here, please click OK to activate them.
Vigor2750 Series User’s Guide | 135  |