Getnet Router GA-121A User Manual

							
GA-121A User Manual 
 
 
The following table describes the parameters of this page: 
Field Description 
PVC Settings 
   The virtual path between two points in an ATM network, and its valid value is from 0 to 255. 
   The virtual channel between two points in an ATM network, ranging from 32 to 65535 (0 to 31 is 
reserved for local management of ATM traffic). 
Encapsulation Select the method of encapsulation provided by your 
ISP. You can select  LLC/SNAP or VC-Mux . 
Channel Mode 
Select the WAN connection type. You can select  1483 
Bridged, 1483 MER, PPP over Ethernet (PPPoE) , 
PPP over ATM (PPPoA) , or 1483 Routed .  
WAN IP 
Settings 
  Obtain an IP address automatically : Obtain the 
DNS server assigned by the uplink equipment, such 
as BAS. 
   Use the following IP address : The static IP 
18  
						

							
GA-121A User Manual 
Description Field 
address that your ISP provides. 
Default Route You can select Enable or Disable . 
DNS Settings 
  Obtain DNS Automatically : The dynamic IP 
address is not fixed. Your ISP assigns the different 
one each time. 
   Use the following DNS server address : If you 
want to enter the DNS server address by yourself, 
select it and enter the related data. 
 
After finishing the configuration, click  NEXT. The page shown in the following 
figure appears. 
 
1483 Routed 
19  
						

							
GA-121A User Manual 
 
 
The following table describes the parameters of this page: 
Field Description 
PVC Settings 
   The virtual path between two points in an ATM network, and its valid value is from 0 to 255. 
   The virtual channel between two points in an ATM network, ranging from 32 to 65535 (0 to 31 is 
reserved for local management of ATM traffic). 
Encapsulation Select the method of encapsulation provided by your 
ISP. You can select  LLC/SNAP or VC-Mux . 
Channel Mode 
Select the WAN connection type. You can select  1483 
Bridged, 1483 MER, PPP over Ethernet (PPPoE) , 
PPP over ATM (PPPoA) , or 1483 Routed .  
WAN IP 
Settings 
  Obtain an IP address automatically : Obtain the 
DNS server assigned by the uplink equipment, such 
as BAS. 
   Use the following IP address : The static IP 
20  
						

							
GA-121A User Manual 
21 
Field Description 
address that your ISP provides. 
Default Route You can select Enable or Disable . 
DNS Settings 
  Obtain DNS Automatically : The dynamic IP 
address is not fixed. Your ISP assigns the different 
one each time. 
   Use the following DNS server address : If you 
want to enter the DNS server address by yourself, 
select it and enter the related data. 
 
3.4   Network 
In the navigation bar, choose  Network. The  Network  page that is displayed 
contains  LAN and WAN . 
3.4.1   LAN 
Choose Network  > LAN. The LAN page that is displayed contains  LAN IP, 
DHCP , and DHCP Static IP . 
3.4.1.1 LAN IP 
Click LAN IP in the left pane. The page shown in the following figure appears. 
In this page, you can change IP address of the router. The default IP address is 
192.168.1.1. This is the private IP address of the router. This is the address 
under which the router can be reached in the local network. It can be freely 
assigned from the block of available addresses.  
						

							
GA-121A User Manual 
 
 
The following table describes the parameters and button of this page: 
Field Description 
IP Address 
Enter the IP of LAN interface. It is recommended to 
use an address from a block that is reserved for 
private use. This address block is 192.168.1.1- 
192.168.255.254. 
Subnet Mask 
Enter the subnet mask of LAN interface. The range 
of subnet mask is from 
255.255.0.0-255.255.255.254. 
Secondary IP Select it to enable the secondary LAN IP. The two 
LAN IP addresses must be in the different network.
IGMP Snooping You can disable or enable IGMP Snooping. 
Apply Changes Click it to save the settings of this page. 
 
3.4.1.2 DHCP 
Dynamic Host Configuration Protocol (DHCP) allows the individual PC to obain 
the TCP/IP configuration from the centralized DHCP server. You can configure 
this router as a DHCP server or disable it. The DHCP server can assign IP 
address, IP default gateway, and DNS server to DHCP clients. This router can 
also act as a surrogate DHCP server (DHCP proxy) where it relays IP address 
22  
						

							
GA-121A User Manual 
assignment from an actual real DHCP server to clients. You can enable or 
disable DHCP server or DHCP proxy. 
Click  DHCP  in the left pane. The page shown in the following figure appears. 
 
 
The following table describes the parameters in this page: 
Field Description 
DHCP Mode 
If set to DHCP Server , the router can assign IP 
addresses, IP default gateway and DNS Servers to 
Windows95, Windows NT and other systems that 
support the DHCP client. 
IP Pool Range It specifies the first and the last of contiguous IP 
address of the IP address pool. 
Show Client Click it, the  Active DHCP Client Table  page appears. 
It shows the assigned IP address of the clients. 
Default 
Gateway Enter the IP default gateway of the IP address pool. 
Max Lease 
Time The lease time determines the period that the PCs 
retain the assigned IP addresses before the IP 
addresses change. 
Domain Name 
Enter the domain name if you know. If you leave this 
blank, the domain name obtained by DHCP from the 
ISP is used. You must enter host name (system name) 
23  
						

							
GA-121A User Manual 
Field Description 
on each individual PC. The domain name can be 
assigned from the router through the DHCP server. 
 
Click Show Client  in the DHCP Settings page. The page shown in the following 
figure appears. You can view the IP address assigned to each DHCP client. 
 
 
The following table describes the parameters and buttons in this page: 
Field Description 
IP Address It displays the IP address relative to the MAC 
address. 
MAC Address 
It displays the MAC address of the PC. 
Each Ethernet device has a unique MAC address. 
The MAC address is assigned at the factory and it 
consists of six pairs of  hexadecimal character, for 
example, 00-A0-C5-00-02-12. 
Expired (s) 
It displays the lease time. The lease time determines 
the period that the PCs retain the assigned IP 
addresses before the IP addresses change. 
Refresh Click it to refresh this page. 
Close Click it to close this page. 
 
Choose  None in the  DHCP Settings  page. The page shown in the following 
figure appears. 
24  
						

							
GA-121A User Manual 
 
 
Choose DHCP Relay  in the DHCP Mode page. The page shown in the following 
figure appears. 
 
 
The following table describes the parameters of this page: 
Field Description 
DHCP Mode 
If set to DHCP Relay , the router acts a surrogate DHCP 
Server and relays the DHCP requests and reponses 
between the remote server and the client. 
Relay Server Enter the DHCP server address provided by your ISP. 
 
25  
						

							
GA-121A User Manual 
3.4.1.3  DHCP Static IP 
Click DHCP Static IP  in the left pane. The page shown in the following figure 
appears. You can assign the IP addresses on the LAN to the specific individual 
PCs based on their MAC address. 
 
 
The following table describes the parameters and buttons of this page: 
Field Description 
IP Address It specifies the IP address of the IP address pool.
Mac Address Enter the MAC address of a PC on the LAN. 
Add After entering the IP address and MAC address,  click it. A row will be added in the  DHCP Static IP 
Ta b l e . 
Delete Selected Select a row in the  DHCP Static IP Table , then 
click it, this row is deleted. 
Undo Click it to refresh this page. 
DHCP Static IP TableIt shows the assigned IP address based on the  MAC address. 
 
3.4.2   WAN 
Choose  Network  > WAN . The  WAN  page that is displayed contains  WAN, AT M  
Setting , and ADSL Setting . 
3.4.2.1 WAN 
Click WAN in the left pane. The page shown in the following figure appears. 
26  
						

							
GA-121A User Manual 
In this page, you can configure WAN interface of your router. 
 
 
The following table describes the parameters of this page: 
Field Description 
Default Route Selection You can choose Auto or Specified. 
VPI The virtual path between two points in an 
ATM network, ranging from 0 to 255. 
VCI 
The virtual channel between two points in an 
ATM network, ranging from 32 to 65535 (1 to 
31 are reserved for known protocols) 
Encapsulation You can choose  LLC and VC-Mux . 
Channel Mode You can choose  1483 Bridged, 1483 MER, 
PPPoE , PPPoA , or 1483 Routed . 
Enable NAPT Select it to enable the NAPT function of the 
router. If you do not select it and you want to 
27