Netgear SRX5308 Specifications download pdf (Page 55)

3. LAN Configuration

This chapter describes how to configure the advanced LAN features of your VPN firewall. This

chapter contains the following sections:

• Manage Virtual LANs and DHCP Options

• Configure Multi-Home LAN IP Addresses on the Default VLAN

• Manage Groups and Hosts (LAN Groups)

• Configure and Enable the DMZ Port

• Manage Routing

Manage Virtual LANs and DHCP Options

A local area network (LAN) can generally be defined as a broadcast domain. Hubs, bridges,

or switches in the same physical segment or segments connect all endpoints. Endpoints can

communicate with each other without the need for a router. Routers connect LANs together,

routing the traffic to the appropriate port.

A virtual LAN (VLAN) is a local area network with a definition that maps workstations on

some basis other than geographic location (for example, by department, type of user, or

primary application). To enable traffic to flow between VLANs, traffic needs to go through a

router, just as if the VLANs were on two separate LANs.

A VLAN is a group of PCs, servers, and other network resources that behave as if they were

connected to a single network segment—even though they might not be. For example, all

marketing personnel might be spread throughout a building. Yet if they are all assigned to a

single VLAN, they can share resources and bandwidth as if they were connected to the same

segment. The resources of other departments can be invisible to the marketing VLAN

members, accessible to all, or accessible only to specified individuals, depending on how the

IT manager has set up the VLANs.

VLANs have a number of advantages:

• They make it easy to set up network segmentation. Users who communicate most

frequently with each other can be grouped into common VLANs, regardless of physical

location. Each group’s traffic is contained largely within the VLAN, reducing extraneous

traffic and improving the efficiency of the whole network.

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Netgear SRX5308 Specifications Page 55