Zyxel OLT2412 [161/326] Vlan translation example

Chapter 23 VLAN Stacking and Translation

OLT2412 User’s Guide

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23.2.1 VLAN Translation Example

In the following example figure, packets that carry VLAN ID 12 and are received on port 3 match a

pre-configured VLAN translation rule. The OLT translates the VLAN ID from 12 into 123 before

forwarding the packets.

Figure 43 VLAN Translation Example

23.3 VLAN Tag Format

A VLAN tag (service provider VLAN stacking or customer IEEE 802.1Q) consists of the following

three fields.

“Type” is a standard Ethernet type code identifying the frame and indicates that whether the frame

carries IEEE 802.1Q tag information. SP TPID (Service Provider Tag Protocol Identifier) is the

service provider VLAN stacking tag type. Many vendors use 0x8100 or 0x9100.

TPID (Tag Protocol Identifier) is the customer IEEE 802.1Q tag.

• If the VLAN stacking port role is access port, then the OLT adds the SP TPID tag to all incoming

frames on the service provider's edge devices (1 and 2 in the VLAN stacking example figure).

Priority refers to the IEEE 802.1p standard that allows the service provider to prioritize traffic based

on the class of service (CoS) the customer has paid for.

• On the OLT, configure priority level of the inner IEEE 802.1Q tag.

• "0" is the lowest priority level and "7" is the highest.

VID is the VLAN ID. SP VID is the VID for the second (service provider’s) VLAN tag.

Port 3

123

Service Provider

Network

Table 82 VLAN Tag Format

Type Priority VID