Qwest 3347-02 Router Manual PDF (Setup & Configuration Guide)

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106

Link:

VLAN

When you click

VLAN

, the

VLANs

page appears.

Overview

A Virtual Local Area Network (VLAN) is a network of computers or other devices that

behave as if they are connected to the same wire even though they may be physically

located on different segments of a LAN. You set up VLANs by conﬁguring the Gateway soft-

ware rather than hardware. This makes VLANs very ﬂexible. VLANs behave like separate

and independent networks.

Beginning with Version 7.7.4, VLANs are now strictly layer 2 entities. They can be thought

of as virtual Ethernet switches, into which can be added: Ethernet ports, router IP inter-

faces, ATM PVC/VCC interfaces, SSIDs, and any other physical port such as USB, HPNA,

or MOCA. This allows great ﬂexibility on how the components of a system are connected to

each other.

VLANs are part of Motorola’s VGx Virtual Gateway technology which allows individual port-

based VLANs to be treated as separate and distinct “channels.” When data is passed to a

Motorola Netopia VGx-enabled broadband gateway, speciﬁc policies, routing, and prioritiza-

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tion parameters can be applied to each individual service, delivering that service to the

appropriate peripheral device with the required level of quality of service (QoS). In effect, a

single Motorola gateway acts as separate virtual gateways for each distinct service being

delivered.

Motorola’s VGx technology maps multiple local VLANs to one or more speciﬁc permanent

virtual circuits (PVCs) for DSL, or wide area network VLANs for a ﬁber network. VGx pro-

vides service segmentation and QoS controls, service management, and supports delivery

of triple play applications: voice for IP Telephony, video for IPTV, and data.

Your Gateway supports the following:

•

Port-based VLANs - these can be used when no trunking is required

•

Global VLANs - these are used when trunking is required on any port member of the

VLAN

- Supports 802.1q and 802.1p; both are conﬁgurable

•

Routed VLANs

- WAN-side VLAN with Multiple WAN IPoE interface support and IP interface-to-VLAN

binding

- LAN-side VLAN with IP interface-to-VLAN binding

- Inter-VLAN routing

•

Bridged VLANs - these VLANs are used to bridge trafﬁc from LAN to WAN

•

Prioritization per VLAN and per port

Ethernet Switching/Policy Setup

Before you conﬁgure any VLANs, the unconﬁgured Gateway is set up as a router composed

of a LAN switch, a WAN switch, and a router in the middle, with LAN and WAN IP interfaces

connected to their respective switches. These bindings between Ethernet switch ports, IP

LAN interface, IP WAN interface and WAN physical ports are automatically created.

When you conﬁgure any VLANs, the default bindings are no longer valid, and the system

requires explicit binding between IP interfaces and layer 2 interfaces. Each VLAN can be

thought of as a layer 2 switch, and enabling each port or interface in a VLAN is analogous

to plugging it in to the layer 2 switch.

Thereafter, in order for devices to communicate on layer 2, they must be associated in the

same VLAN. For devices to communicate at layer 3, the devices must be either on the

same VLAN, or on VLANs that have an Inter-VLAN routing group enabled in common.

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When conﬁguring VLANs you must deﬁne how trafﬁc needs to be forwarded:

•

If trafﬁc needs to be bridged between LAN and WAN you can create a single VLAN that

encompasses the WAN port and LAN ports.

•

If trafﬁc needs to be routed then you must deﬁne four elements:

• LAN-side VLANs

• WAN-side VLANs

• Associate IP Interfaces to VLANs

• Inter-VLAN Routing Groups: conﬁguration of routing between VLANs is done by associ-

ation of a VLAN to a Routing Group. Trafﬁc will be routed between VLANs within a rout-

ing group. The LAN IP Ethernet Interface can be bound to multiple LAN VLANs, but

forwarding can be limited between an Ethernet LAN port and a WAN VLAN if you properly

conﬁgure Inter-VLAN groups.

Inter-VLAN groups are also used to block routing between WAN interfaces. If each WAN

IP interface is bound to its own VLAN and if you conﬁgure a different Inter-VLAN group

for each WAN VLAN then no routing between WAN IP interfaces is possible.

•

Example: to route between a VCC and all the LAN ports, which effectively is similar to

the default conﬁguration without any VLANs:

Create a VLAN named “VccWan” consisting of vcc1, ip-vcc1, routing-group 1

Create a VLAN named “Lan” consisting of eth0.1, eth0.2, eth0.3, eth0.4, ssid1, ssid2,

ssid3, ssid4 (etc.), ip-eth-a, routing-group 1

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An example of multiple VLANs, using a Motorola Netopia® Gateway with VGx managed

switch technology, is shown below:

A VLAN Model Combining Bridging and Routing

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To conﬁgure VLANs check the

Enable

checkbox.

To create a VLAN select a list item from the main VLAN page and click the

Edit

button.

The

VLAN Entry

page appears.

Check the

Enable

checkbox, and enter a descriptive name for the VLAN.

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