724-746-5500 | blackbox.com Page 24Chapter 3: Installation
For different network applications, the subnet mask may be 255.255.255.240. It is a small network that accommodates a
maximum of 15 nodes in the network.
Default gateway:
For the routed packet, if the destination is not in the routing table, all the traffic is put into the device with the designated IP
address, known as the default router. Basically, it is a routing policy.
To assign an IP address to the switch, check what the IP address is for the network that will be connected to the switch. Use the
same network address and append your host address to it.
Figure 3-13. Default gateway.
For example, you can enter the IP address, “192.168.1.1,” as shown in Figure 3-13. An IP address such as 192.168.1.x must be set
on your PC.
Next, type in the Subnet Mask, for example, “255.255.255.0.” Any subnet mask such as 255.255.255.x is allowable in this case.
3.2 Typical Applications
The LGB2118A implements (16) Gigabit Ethernet TP ports with auto MDI-X and (2) slots for the removable module supporting LC
fiber SFP modules. The LGB2124A has (20) Gigabit Ethernet TP ports with auto MDI-X and (4) slots for the removable combo
module supporting twisted-pair and LC fiber SFP modules. For more details about the switch’s specifications, refer to Chapter 1.
The switch is suitable for the following applications.
• Central site/remote site application is used in carrier or ISP (see Figure 3-14).
• Peer-to-peer application is used in two remote offices (see Figure 3-15).
• Office network (see Figure 3-16).