17-OTA050101 Ethernet Service Introduction ISSUE 1.21

7/30/2019 17-OTA050101 Ethernet Service Introduction ISSUE 1.21

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Copyright 2008 Huawei Technologies Co., Ltd. All rights reserved.

Ethernet Service

Introduction


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Copyright 2008 Huawei Technologies Co., Ltd. All rights reserved. Page1

Objectives

Upon completion of this course, you will be able to:

Outline the classification of Ethernet service;

Explain the function and applications of different types Ethernet

service.


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Contents

1. Basic Concepts

2. Ethernet Service Classification


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Basic Concepts

Port

External physical port of Ethernet unit, the common rates of

external port are 10M, FE, GE;

VC Trunk

Virtual Container Trunk, VC Trunk is built by VC. It is the

internal port of Ethernet unit.


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Basic Concepts of VLAN

VLAN 100 VLAN 200

Purpose of VLAN division:

Broadcast suppression

Security

Efficient management

VLAN division modes:

Port based

MAC address based

L3 protocol based


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Send

to

C

ross-connectunit

Note: Both of the external and internal ports can process Tag flag

Structure of Ethernet Unit

FE

GE

Collecting alarm

and performance

event

NX

VC4

GFP-F

NVC12/VC3/VC4

FE

Port

VCTRUNK


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Tag Attributes

Tag flag is used to identify the type of frames. Three types of Tag

attributes are available: Tag aware, Access, and Hybrid.

Tag Aware: When the port is set to be Tag aware, the port transmits the

packets with the Tag flag transparently and discards those without the Tag flag;

Access: When the port is set to be Access, the port attaches a Tag flag to thepackets without Tag flag according to its VLAN ID and discards those with the

Tag flag;

Hybrid: When the port is set to be Hybrid, the port can process packets

regardless of the Tag flag and attach a Tag flag to the packets without the Tag

flag according to its VLAN ID.


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Packet

PortTag Untag

Tag aware (In) Transmit transparently Discard

Tag aware (Out) Transmit transparently

Access (In) Discard Attach default VLAN ID

Access (Out) Delete VLAN ID

Hybrid (In) Transmit transparently Attach default VLAN ID

Hybrid (Out)

If VLAN ID is the same, delete

the Tag flag, otherwise transmit

transparently

Basic Concepts


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Contents

1. Basic Concepts



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2.1 Overview

2.2 EPL

2.3 EVPL

2.4 EPLAN

Contents


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EPL: Ethernet Private Line

EPLAN: Ethernet Private LAN

EVPL: Ethernet Virtual private Line

EVPLAN: Ethernet Virtual Private LAN

Overview


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EPL

Definition

EPL Classification

EPL (Ethernet Private Line) ,EPL can provide low latency

and high security point to point transmission.

Point to Point EPL: Point to point transmission without sharing;

Port Shared EPL: Share one Port with different VLAN ID;

VCTRUNK Shared EPL: Share one VCTRUNK with different

VLAN ID.


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Point to Point EPLA B

2f MS_SP Ring

T2000

NP ChainNE1

NE2

NE3

NE4

NE5

A B

PORT1 PORT2

PORT1 PORT2

VCTRUNK Service A Service B

Point to Point transmission without sharing


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Port Shared EPL

VCTRUNK C & C(1) Service C & C(2) Service

NE

1

NE2

NE3

NE4 NE5

PORT3 PORT4

C(2)C(1)

C (HQ.)

PORT3

NP Chain

T2000

Share one external port with different VLAN ID

2f MS_SP Ring


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VCTRUNK Shared EPL

NE1

NE2

NE3

NE4

NE5

DPORT1

PORT2

PORT2PORT1

E

D E

2f MS_SP RingNP Chain

Share one VCTRUNK with different VLAN ID

T2000

VCTRUNK D & D Service E & E Service


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Questions

How many types of EPL can be provided?

Can EPL implement VCTRUNK sharing with the same

VLAN ID?


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Definition

EVPL( Ethernet Virtual Private Line) multiple service

flows can share VCTRUNK with VLAN ID and MPLS. It

can improve the bandwidth utilization ratio and save the

ports resource of Ethernet unit.

EVPL


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EVPL-- Comparison

Application EPL EVPL

Point to Point Support Support

Port Shared Support Support

VCTRUNK

Shared

Support Support

MPLS Un-support Support

QinQ Un-support Support

EVPL can provide VCTRUNK sharing with MPLS and QinQ

technology


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MPLS Basics

MPLS: Multi-protocol Label Switching, standard routing and switching

platform;

Tunnel/VC: Two labels in MPLS, range of value is 16(220-1);

LSP: Label switching path, different value labels will be given in different

nodes, data can be sent forward according these labels;

P/PE: P (Provider) internal node of MPLS network, PE (Provider Edge) the

edge of MPLS network.

MPLS network

PE

PE PIP

MPLS

LSP

P


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QinQ Basics

QinQ technology is a VLAN stacking technology

C-VLAN

S-VLAN

Advantages of QinQ technology:

Expands VLAN and alleviates VLAN resource insufficiency;

Extends LAN service to WAN, connecting the client network to

the carrier network and supporting transparent transmission.


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EVPL (MPLS)

EVPL can provide VCTRUNK sharing with different MPLS labels if

the VLAN ID of the service are the same. The traffic of A and B

will share VCTRUNK1 with different Tunnel and VC values.

LAN Switch

SDH networkNE1 NE2

A2

A VLAN ID=11

Tunnel

VC

55

25

Tunnel

VC

55

26

VCTRUNK

OptiX OSN3500

Service link

B VLAN ID=11

A VLAN ID=11

B VLAN ID=11


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EVPL (QinQ)

EVPL can provide VCTRUNK sharing with different S-VLAN if the

C-VLAN ID of the service are the same. The traffic of A and B will

share VCTRUNK1 with different S-VLAN values.

LAN Switch

SDH networkNE1 NE2

A2

A VLAN ID=11

VCTRUNK

OptiX OSN3500

Service link

B VLAN ID=11

A VLAN ID=11

B VLAN ID=11

S-VLAN C-VLAN

20 11

S-VLAN C-VLAN

30 11


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Questions

Whats the difference between EPL and EVPL?

Whats the main feature of EVPL?


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EPLAN

Definition

EPLAN (Ethernet Private LAN), it is based on L2

switching. It can provide muti-points to muti-points low

latency and high security communication.


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EPLAN

EPLAN (Ethernet Private Local Area Network) all the sub-companies at

different areas can communicate with each other. NE3 implements the L2

switching function.

NE1

NE2

NE3

NE4

NE5PORT1

PORT1

F(1)

F(2)

PORT1

F(3)

VB

PORT1

VCTRUNK1

PORT1

VCTRUNK2VCTRUNK1VB

VB

PORT1

VCTRUNK1VCTRUNK

F(1) & F(2) Service

F(3) & F(2) Service

F(1) & F(3) Service

2f MS_SP Ring

T2000


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EPLAN-- MAC Add. Self-learning

Port 1

Port 2

MAC add. Port

MACA 1

MACB 1

MACC 2

MACD 2

L2 Switch

MACD MACA

MACA MACD

Forwarding based on destination address


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EPLAN-- VB/LP

VB: Virtual bridge, logical L2 switch. One Ethernet unit can

configure N*VB, each VB provides M*LP, the data in

different VB is isolated;

LP: Logical Port, the logical port of VB.

VB2VB3

Ethernet Unit

PORT

LP1

LP2

LP5

LP6

VCG

VB1

LP4


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EPLAN-- RSTP/STP

Root

RSTP/STP: Rapid/Spanning tree protocol. The protocol will

temporarily disable the backup links when loop of Ethernet

service is occurred in the network.


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Questions

What is the advantage of EPLAN?

What is the working mechanism of EPLAN?


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Summary

Basic Concepts

Ethernet Service Classification


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Documents

17-OTA050101 Ethernet Service Introduction ISSUE 1.21