ZyXEL Communications P-660HN-F1 14.1.3 802.1Q/1P Example

Chapter 14 802.1Q/1P

PVC

Avirtual circuit is a logical point-to-point circuit between customer sites. Permanent means that the circuit is preprogrammed by the carrier as a path through the network. It does not need to be set up or torn down for each session.

Forwarding Tagged and Untagged Frames

Each port on the device is capable of passing tagged or untagged frames. To forward a frame from an 802.1Q VLAN-aware device to an 802.1Q VLAN-unaware device, the ZyXEL Device first decides where to forward the frame and then strips off the VLAN tag. To forward

aframe from an 802.1Q VLAN-unaware device to an 802.1Q VLAN-aware switch, the ZyXEL Device first decides where to forward the frame, and then inserts a VLAN tag reflecting the ingress port's default VID. The default PVID is VLAN 1 for all ports, but this can be changed.

Whether to tag an outgoing frame depends on the setting of the egress port on a per-VLAN, per-port basis (recall that a port can belong to multiple VLANs). If the tagging on the egress port is enabled for the VID of a frame, then the frame is transmitted as a tagged frame; otherwise, it is transmitted as an untagged frame.

14.1.3 802.1Q/1P Example

This example shows how to configure the 802.1Q/1P settings on the ZyXEL Device.

Figure 126 802.1Q/1P Example

P-660HN-F1

1		1	VoIP Network
	2
2			Internet - (PPPoE)
		3
	4		Internet - (PPPoE)
3
		5
4	6
	7
	8

LAN1 and LAN2 are connected to ATAs (Analogue Telephone Adapters) and used for VoIP traffic. You want to create high priority for this type of traffic, so you want to group these ports into one VLAN (VLAN2) and then to a PVC (PVC1) where the priority is set to high level of service.

You would start with the following steps.

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