ZyXEL P-871H User Guide - Page 44

P-871H Series User’s Guide

Chapter 6 VLAN

43

C

HAPTER

6

VLAN

The type of screen you see here depends on the

VLAN Type

you selected in the

Prestige

Setup

screen. This chapter shows you how to configure 802.1Q tagged and port-based

VLANs.

6.1

Introduction to IEEE 802.1Q Tagged VLAN

A tagged VLAN uses an explicit tag (VLAN ID) in the MAC header to identify the VLAN

membership of a frame across bridges - they are not confined to the Prestige on which they

were created. The VLANs can be created statically by hand or dynamically through GVRP.

The VLAN ID associates a frame with a specific VLAN and provides the information that the

Prestige needs to process the frame across the network. A tagged frame is four bytes longer

than an untagged frame and contains two bytes of TPID (Tag Protocol Identifier, residing

within the type/length field of the Ethernet frame) and two bytes of TCI (Tag Control

Information, starts after the source address field of the Ethernet frame).

The CFI (Canonical Format Indicator) is a single-bit flag, always set to zero for Ethernet

devices. If a frame received at an Ethernet port has a CFI set to 1, then that frame should not be

forwarded as it is to an untagged port. The remaining twelve bits define the VLAN ID, giving

a possible maximum number of 4,096 (212) VLANs. Note that user priority and VLAN ID are

independent of each other. A frame with VID (VLAN Identifier) of null (0) is called a priority

frame, meaning that only the priority level is significant and the default VID of the ingress port

is given as the VID of the frame. Of the 4096 possible VIDs, a VID of 0 is used to identify

priority frames and value 4095 (FFF) is reserved, so the maximum possible VLAN

configurations are 4,094.

6.1.1

Forwarding Tagged and Untagged Frames

Each port on the Prestige is capable of passing tagged or untagged frames. To forward a frame

from an 802.1Q VLAN-aware Prestige to an 802.1Q VLAN-unaware Prestige, the Prestige

first decides where to forward the frame and then strips off the VLAN tag. To forward a frame

from an 802.1Q VLAN-unaware Prestige to an 802.1Q VLAN-aware Prestige, the Prestige

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.

TPID

2 Bytes

User Priority

3 Bits

CFI

1 Bit

VLAN ID

12 bits

Section	Page
P-871G Series User’s Guide	1
Copyright	2
Interference Statements and Warnings	3
Safety Warnings	4
ZyXEL Limited Warranty	5
Customer Support	6
Table of Contents	8
List of Figures	12
List of Tables	14
Preface	16
Getting to Know Your Prestige	18
1.1 Introduction	18
1.2 Software Features	18
1.3 Hardware Features	19
1.4 Internet Access Application	19
Hardware Overview	20
2.1 Hardware Connection	20
2.2 Front Panel LEDs	20
2.3 Rear Panel	21
2.3.1 VDSL Port	21
2.3.2 PHONE Port	21
2.3.3 LAN Ports	21
2.3.4 Console Port	21
2.3.5 POWER Port	22
The Web Configurator	24
3.1 Introduction	24
3.2 System Login	24
3.3 The Status Screen	25
3.3.1 Change Your Password	27
3.4 Prestige Lockout	27
3.5 Resetting the Prestige	28
3.5.1 Reload the Configuration File	28
3.6 Logging Out of the Web Configurator	29
3.7 Help	29
System Status and Port Statistics	30
4.1 Overview	30
Basic Setting	36
5.1 Overview	36
5.3 Introduction to VLANs	37
5.4 IGMP Snooping	38
VLAN	44
6.1 Introduction to IEEE 802.1Q Tagged VLAN	44
6.1.1 Forwarding Tagged and Untagged Frames	44
6.2 Select the VLAN Type	45
6.4.1 Configure a Port-based VLAN	50
Broadcast Storm Control	52
7.2 Broadcast Storm Control Setup	52
Maintenance	54
8.1.1 VDSL Chip Reset	54
8.1.2 Load Factory Defaults	54
8.1.3 Reboot System	55
8.2 Firmware and Configuration Management	55
8.2.1 Filename Conventions	56
8.2.1.1 Example FTP Commands	56
8.2.2 FTP Command Line Procedure	56
8.2.3 GUI-based FTP Clients	57
MAC Table	58
9.2 Viewing the MAC Table	59
Introduction to CLI	60
10.1 Overview	60
10.1.1 Accessing the Command Line Interface	60
10.2 The Login Screen	60
10.2.1 Command Conventions	61
10.2.2 Command Syntax Conventions	61
10.2.3 Getting Help	61
10.3 Command Summary	62
Command Examples	64
11.1 Overview	64
11.2 config save	64
11.3 ip igmpsnoop	64
11.4 sys password	64
11.5 sys sw bmstorm enable	65
11.6 sys sw mac list	65
11.7 Ethernet Port Setup	65
11.7.1 sys sw port enable	66
11.7.2 sys sw port speed	66
11.7.3 sys sw port status	66
11.7.4 sys sw qos defpri	67
11.7.5 sys sw vlan status	67
11.7.6 sys sw vlan type	67
11.7.7 sys sw vlan1q port status	68
11.7.8 sys sw vlan1q port defaultVID	68
11.7.9 sys sw vlan1q svlan list	69
11.7.10 sys sw vlan1q svlan setentry	69
11.7.11 sys sw vlan1q status	69
Setting up Your Computer’s IP Address	72
Verifying Settings	87
IP Subnetting	88
ASCII Characters	96
Index	98
Numerics	98
A	98
B	98
C	98
D	98
E	98
F	98
G	99
H	99
I	99
L	99
M	99
N	99
O	99
P	99
Q	100
R	100
S	100
T	100
U	100
V	100
W	101

ZyXEL P-871H User Guide - Page 44

Introduction to IEEE 802.1Q Tagged VLAN

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