Netgear Modem FVS318N User Manual download pdf (Page 55)

LAN Configuration

ProSafe Wireless-N 8-Port Gigabit VPN Firewall FVS318N

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:

• It is 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.

• They are easy to manage. The addition of nodes, as well as moves and other changes,

can be dealt with quickly and conveniently from a management interface rather than from

the wiring closet.

• T

hey provide increased performance. VLANs free up bandwidth by limiting node-to-node

and broadcast traffic throughout the network.

• T

hey ensure enhanced network security. VLANs create virtual boundaries that can be

crossed only through a router. So standard, router-based security measures can be used

to restrict access to each VLAN.

Port-Based VLANs

The wireless VPN firewall supports port-based VLANs. Port-based VLANs help to confine

broadcast traffic to the LAN ports. Even though a LAN port can be a member of more than

one VLAN, the port can have only one VLAN ID as its port VLAN identifier (PVID). By default,

all eight LAN ports of the wireless VPN firewall are assigned to the default VLAN, or VLAN 1.

Therefore, by default, all eight LAN ports have the default PVID 1. However, you can assign

another PVID to a LAN port by selecting a VLAN profile from the drop-down list on the LAN

Setup screen.

After you have created a VLAN profile and assigned one or more ports to the profile, you

need to enable the profile to activate it.

The wireless VPN firewall’s default VLAN cannot be deleted. All untagged traffic is routed

through the default VLAN (VLAN1), which you need to assign to at least one LAN port.

Note the following about VLANs and PVIDs:

• One p

hysical port is assigned to at least one VLAN.

• One p

hysical port can be assigned to multiple VLANs.

• W

hen one port is assigned to multiple VLANs, the port is used as a trunk port to connect

to another switch or router.

• W

hen a port receives an untagged packet, this packet is forwarded to a VLAN based on

the PVID.

• W

hen a port receives a tagged packet, this packet is forwarded to a VLAN based on the

ID that is extracted from the tagged packet.

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Netgear Modem FVS318N User Manual Page 55

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