Motorola 3347 - Manual (Page 107)

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tion parameters can be applied to each individual ser vice, delivering that ser vice to the
appropriate peripheral device with the required level of quality of ser vice (QoS). In effect, a
single Motorola gateway acts as separate vir tual gateways for each distinct ser vice being
delivered.
Motorola’s VGx technology maps multiple local VLANs to one or more specific permanent
vir tual circuits (PVCs) for DSL, or wide area network VLANs for a fiber network. VGx pro-
vides ser vice segmentation and QoS controls, ser vice management, and suppor ts deliver y
of triple play applications: voice for IP Telephony, video for IPTV, and data.
Your Gateway suppor ts the following:
• Por t-based VLANs - these can be used when no trunking is required
• Global VLANs - these are used when trunking is required on any por t member of the
VLAN
- Suppor ts 802.1q and 802.1p; both are configurable
• Routed VLANs
- WAN-side VLAN with Multiple WAN IPoE inter face suppor t and IP inter face-to-VLAN
binding
- LAN-side VLAN with IP inter face-to-VLAN binding
- Inter-VLAN routing
• Bridged VLANs - these VLANs are used to bridge traffic from LAN to WAN
• Prioritization per VLAN and per por t
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 inter faces
connected to their respective switches. These bindings between Ethernet switch por ts, IP
LAN inter face, IP WAN inter face and WAN physical por ts are automatically created.
When you configure any VLANs, the default bindings are no longer valid, and the system
requires explicit binding between IP inter faces and layer 2 inter faces. Each VLAN can be
thought of as a layer 2 switch, and enabling each por t or inter face 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.