hcna-transmission practice guide

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OptiX SDH Networking and Self-Healing Protection

Content

SDH Network Topologies....................................................................Page 2

Survivable networks and their protection mechanisms.Page 14

Confidential Information of Huawei. No Spreading Without Permission

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Through this course, trainees should be able to:

List the SDH different topologies structures, features and applications.

Have idea about the basic concept of the SDH network protection. And understand

the network objectives, application architecture, switching initialization and

restoration criteria, characteristics, network capacity of different types of network

protection.

References

ITU-T Recommendation G.841 (Oct, 1998) Types and characteristics of SDH

network protection architectures

ITU-T Recommendation G.810 (Aug, 1996) Definitions and terminology for

synchronization networks ITU-T Recommendation G.803

ITU-T Recommendation G.803 (Aug, 2003) Architecture of transport networks

based on the synchronous digital hierarchy (SDH)


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The network topology, the geometrical layout of SDH network nodes and transmission

lines, reflects the physical connection of the network. The network topology is important

in the sense that it determines the performance, reliability and cost-effectiveness of an SDH

network.


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The chain network is simple and economical at the initial application stage of SDH

equipment. For a chain network, its more difficult and more expensive to protect the

traffic, compared with a ring network. The chain network is used in cases where the traffic

is unimportant or where the traffic load is small so that we dont have to care about the

traffic protection.


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In the star network, the hub node selects routes and passes through the traffic signals for

all the other nodes. As a result, the hub node is able to manage the bandwidth resources

thoroughly and flexibly. On the other hand, there is the possibility of a potential bottleneck

of bandwidth resources. Besides, the equipment failure of the hub node may result in the

breakdown of the entire network.


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A tree structure can be considered as the combination of chain and star structures. It is

suitable for broadcast service. However, due to the bottleneck problem and the optical

power budget limit, it is not suitable for bidirectional traffic.


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The ring network is the most widely used network for SDH transmission networks.

In such a structure, any traffic between two adjacent nodes can be directly add/drop

between them. For traffic between two non-adjacent nodes, we have to configure the

add/drop traffic at the source node and the sink node. And the pass-through traffic in

between those two nodes must be created as well.

The ring network is highly survivable. The most obvious advantage of a ring network is its

high survivability that is essential to modern optical networks with large capacity. Thus, the

ring network enjoys very broad applications in SDH networks.


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Mesh networks are such communications networks in which many nodes are

interconnected with each other via direct routes. In such topological structure, if direct

routes are used in the interconnection of all the nodes, this structure is considered as an

ideal mesh topology. In a non-ideal mesh topological structure, the service connection

between nodes that are not connected directly is established through route selection and

transiting via other nodes.

In a mesh network, no bottle neck problem exists. Since more than one route can be

selected between any nodes, when any equipment fails, services can still be transmitted

smoothly through other routes. Thus, the reliability of service transmission is increased.

However, such networks are more complicated, costly and difficult to manage. Mesh

networks are very suitable for those regions with large traffic.


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Tangent ring networks / Intersectant ring networks/ Not protection chain.

In selecting a topological structure, many factors should be considered. For example, the

network should be highly survivable, easy to configure, suitable to add new services, and

simple to mange. In a practical communications network, different layers adopt different

topological structures.


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The advantage of sub-network can simplify the big network, make it easy to maintenance.


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The concept of sub-network is introduced in Huawei OptiX series equipment and network

management systems in order to facilitate network topology management, security

management, tributary interface expansion, and traffic management.

In practical applications, it simplifies the topology structure of complicated networks and

thus enables hierarchical management.


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Modern society is getting more and more dependent on communications with the

development of science and technologies, and so higher requirements to network security

are being brought forward. Thus the concept of survivable network comes into being. The

following will deal with the concepts of survivable network.


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Please pay attention to that the network can only restore services here. It cannot repair the

failure in the network, which cannot do without human intervention.

So there should have protection channels to carry over the services in the working

channels. The first requirement for survivability of network is there should have protection

routes or standby routes.

A survivability also need something else. Nodes in the network must have the intelligence

to check out the failure occurred and inform corresponding units of doing relative

protection operation. And the nodes also should have powerful cross-connect capability to

implement the protection operation.

For the survivable network, the protection object can be the physical or electronic.


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Unidirectional traffic and bidirectional traffic are named regarding the traffic flow

directions in the ring. A unidirectional ring means that traffic travel in just one direction,

e.g. clockwise or counter-clockwise. While in a bidirectional ring, traffic signals go in two

directions, one opposite to another.

Protection modes can be divided into two kinds: 1+1 and 1:N. In 1+1 protection mode,

every working system is protected by a dedicated protection system. But in 1:N protection

mode, N systems share one protection system; and when the system is in normal operation,

the protection system can also transmit extra traffic. Thus a higher efficiency can be

obtained than that of 1+1 system.

For multiplex section protection ring, traffic protection is based on multiplex section.

Switching or not is determined by signal qualities of the multiplex section between each

span of nodes.


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The network has two channels (two pairs of fibers): working (active) channel and

protection (standby) channel.

When the network is normal (i.e. no failure on working channel), working channel is used

to transport the traffics.

When the working channel is failed, use the protection channel.

Linear Multiplex Section (MS) protection is one of multiplex section protections. Linear

multiplex section protection switching can be a dedicated or shared protection mechanism.

It protects the multiplex section layer, and applies to point-to-point physical networks. One

protection multiplex section can be used to protect the normal traffic from a number (N) of

working multiplex sections. It cannot protect against node failures. It can operate in a

unidirectional or bidirectional manner, and it can carry extra traffic on the protection

multiplex section in bidirectional operation.


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Source node: concurrent sending

Sink node: selective receiving


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Out of 1+1 linear multiplex section protections, some modes require APS protocol during

the switching process, some dont require. For 1 1 unidirectional switching, the signal

selection is based on the local conditions and requests. Therefore each end operates

independently of the other end, and bytes K1 and K2 are not needed to coordinate switch

action.


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When the network has no failure, N working channels can transmit the normal traffic while

the protection channel transmits extra (unimportant) traffic or it transmits no traffic.

Suppose the fiber from NE A to NE B of the working channel 1 is broken. NE B detects

R_LOS alarm and sends a request to NE A to switch the services on the failed channel to

the protection channel.

Upon receiving the request, NE A bridges the service on the failed channel to the

protection channel.

NE B get the information from NE A and switch to select the service from the protection

channel.

NE A switches to select the service from the protection channel. This step completes the

switching of the service on the faulty channel to the protection channel for both directions.


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When the working channel 1 repaired, the _RLOS alarm disappears. NE B sets the K1 byte

to Wait-To-Restore (WTR) state. If WTR state lasts for a special time (10 minutes by

default), it switches to select the signal from the working channel and sends No Request

signal to the NE A using K1 byte.

NE A releases the bridge and replies with the same indication on K1 byte. The selector at

the NE A is also released.

Receiving this K1 byte causes the NE B to release the bridge. This step completes the

protection recovery.


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In 1+1 protection mode, every working system is protected by a dedicated protection

system. But in 1:N protection mode, N systems share one protection system; and when the

system is in normal operation, the protection system can also transmit extra traffic. Thus a

higher efficiency can be obtained than that of 1+1 system, but a more complicated APS

protocol is needed. This protection mode mainly protects the normal traffic in case optical

cable of the working multiplex section is cut off or multiplex section performance degrades.


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Answer

Linear 1+1 MS

Linear M:N (M=1)


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In OSN networking application, there is no PP ring. But when we need to create a

protection sub-net when using the NMS T2000.

The protection switching principle of two-fiber bidirectional path protection ring is

basically the same as that of unidirectional path protection ring, except that in two-fiber

bidirectional path protection ring, the route of receiving signals is consistent with that of

sending signals

Two-fiber unidirectional MS dedicated protection ring is composed of two fibers. Working

channels and protection channels are carried over different optical fibers. Of course, fiber

P1 can be used to carry extra traffic when not used for protection. The two-fiber

unidirectional Multiplex Section dedicated protection ring is seldom used in actual

applications since it has no advantages over either the two-fiber unidirectional path

protection ring or two-fiber bidirectional multiplex section shared protection.


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The orderwires can be passed through used the backboard in the dual slots

When we are facing the sub-rack, the left hand side is the West line board, the right hand

side is the East line board

The W was used for the source node

The E was used for the sink node


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On each fiber, half the channels are defined as working channels and half are defined as

protection channels. The normal traffic carried on working channels in one fiber are

protected by the protection channels in another fiber traveling in the opposite direction

around the ring. This permits the bidirectional transport of normal traffic. Only one set of

overhead channels is used on each fiber.


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For example, a STM-16 system shall assign #1--- #8VC4 as the working channels, #9---#16

as the protection channels. One fiber of #9---#16 are to protect #1---#8 of another fiber.


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For two-fiber bidirectional multiplex section protection rings, as their traffic have uniform

routes and are sent bidirectional, time slots in the ring can be shared by all nodes, so the

total capacity is closely related to the traffic distribution mode and quantity of nodes on

the ring.


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When a node determines that a switch is required, it sources the appropriate bridge

request in the K-bytes in both directions, i.e. the short path and long path.

The destination node is the node that is adjacent to the source node across the failed span.

When a node that is not the destination nodes receives a higher priority bridge request, it

enters the appropriate pass-through state. In this way, the switching nodes can maintain

direct K-byte communication on the long path. Note that in the case of a bidirectional

failure such as a cable cut, the destination node would have detected the failure itself and

sourced a bridge request in the opposite direction around the ring.

When the destination node receives the bridge request, it performs the bridge and bridges

the channels that were entering the failed span onto the protection channels in the

opposite direction. In addition, for signal fail-ring switches, the node also performs the

switch to protection channels.


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WTR: wait to restore


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APS requests are also initiated based on multiplex section and equipment performance

criteria detected by the NE. All the working and protection channels are monitored

regardless of the failure or degradation conditions (i.e. after a switch has been completed,

all appropriate performance monitoring is continued). The NE initiates the following bridge

requests automatically: Signal Failure (SF), Signal Degrade (SD), Reverse Request (RR), and

Wait to Restore (WTR). The bridge requests are transmitted from NE to NE (not from NMS

to NE).


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The APS controller is responsible for generating and terminating the APS information

carried in the K1K2 bytes and implementing the APS algorithm. With the switching state of

each NE, the APS controller status is also changed.


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For two-fiber bidirectional multiplex section protection rings, as their traffic have uniform



the ring. The network capacity for two-fiber bidirectional multiplex section ring is

*M*STM-N (M is the number of nodes on the ring, STM-N is the STM level). If we count

the protection channels as well, the maximum traffic load that a two-fiber bidirectional MS

shared protection ring can carry is M*STM-N. Nevertheless, half of the traffic would not be

protected in case of fiber failures.


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Four-fiber MS shared protection rings require four fibers for each span of the ring.

Working and protection channels are carried over different fibers: two multiplex sections

transmitting in opposite directions carry the working channels while two multiplex sections,

also transmitting in opposite directions, carry the protection channels. This permits the

bidirectional transport of normal traffic. The multiplex section overhead is dedicated to

either working or protection channels since working and protection channels are not

transported over the same fibers.


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In the normal situation, the services will be transmitted on the working fibers


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When the fibers between two nodes broken, the switching will happen between these

two nodes

In the other sections, the services will be transmit on the original routes


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When all the fibers between two NEs broken, the ring switch happens

All the services will go to the protection fibers


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APS requests are also initiated based on multiplex section and equipment performance

criteria detected by the NE. All the working and protection channels are monitored

regardless of the failure or degradation conditions (i.e. after a switch has been completed,

all appropriate performance monitoring is continued). The NE initiates the following bridge

requests automatically: Signal Failure (SF), Signal Degrade (SD), Reverse Request (RR), and

Wait to Restore (WTR). The bridge requests are transmitted from NE to NE (not from NMS

to NE).


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For four-fiber bidirectional multiplex section protection rings, as their traffic have uniform



the ring. The network capacity for four-fiber bidirectional multiplex section ring is M*STM-

N (M is the number of nodes on the ring; STM-N is the STM level). If we count the

protection channels as well, the maximum traffic load that a four-fiber bidirectional MS

shared protection ring can carry is 2*M*STM-N. Nevertheless, half of the traffic would not

be protected in case of fiber failures.


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K1 bits 1-4 carry bridge request codes. K1 bits 5-8 carry the destination node ID for the

bridge request code indicated in K1 bits 1-4.


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As network structures are becoming more and more complicated, the sub-network

connection protection (SNCP) is the only traffic protection mode that can be adapted to

various network topological structures with a fast switching time.

The protection mechanism of SNCP is similar to the PP ring. But for SNCP, the protection

function will be completed in the cross-connect unit not PDH unit.


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As shown in the figure , SNCP uses the 1+1 protection mode. Traffics are simultaneously

sent on both the working and protection sub-network connection. When the working sub-

network connection fails, or when its performance deteriorates to a certain level, at the

receiving end of the sub-network connection, the signal from the protection sub-network

connection is selected according to the preference selection rule. Switching usually takes

the unidirectional switching mode, thus it needs no APS protocol.


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The protection mechanism of SNCP ring is concurrent sending in the transmitting end and

selective receiving in the receiving end.

Here is a ring chain combination network with 5 nodes. The ring network is SNCP ring.

Suppose that there have E1 services from node A to the end node of the chain. The

services will concurrently sent to both working SNC and protection SNC. After passing

through subnetwork1 and subnetwork2 separately, they both reach node C. there is a

selector in node C, the SNC termination node. Normally, node C will receive the service

from the working SNC, then pass through to the line unit in the chain.


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TU-LOM (HP-LOM): tributary unit loss of multi-frame, a consecutive of 2-10 frames of H4

are not in the order of the multi-frame or have invalid H4 values.

TU-LOP: tributary unit loss of pointer, a consecutive of 8 frames receives invalid pointers or

NDF.

HP-TIM: higher order path trace identifier mismatch, what J1 should receive is not

consistent with it actually receives, generating this alarm in this terminal.

HP-SLM: higher order path signal label mismatch, what C2 should receive is not consistent

with it actually receives, generating this alarm in this terminal.


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If the signal failure recovers in any way, node C would switch back to receive services from

working SNC after 10 minutes.

10 minutes is the default restoration time. It can be set from 5 to 12 minutes.


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Confidential Information of Huawei. No Spreading without Permission

ii

Ethernet Configuration Practice Guide

ISSUE 1.00

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iii

Table of Contents

Course Instruction ........................................................................................................................ 1 About this course .........................................................................................................................1 Course objectives ........................................................................................................................1 Learning Notes .............................................................................................................................1 Relevant Materials .......................................................................................................................1

Chapter 1 EPL Service Configuration using Station by Station Method ...................................... 2 1.1 Laboratory Network Topology Introduction ............................................................................2 1.2 Service Requirement .............................................................................................................3 1.3 Parameters Description .........................................................................................................3 1.4 Configuration Procedure ........................................................................................................5 1.5 Test Service Configuration ................................................................................................. 19

Chapter 2 EVPL Service Configuration using Station by Station Method (PORT-Shared) ....... 20 2.1 Laboratory Network Topology Introduction ......................................................................... 20 2.2 Service Requirements ........................................................................................................ 21 2.3 Parameters Description ...................................................................................................... 21 2.4 Configuration Procedure ..................................................................................................... 25 2.5 Test Service Configuration ................................................................................................. 48

Chapter 3 EVPL Service Configuration using Station by Station Method (VCTRUNK Shared)50 3.1 Laboratory Network Topology Introduction ......................................................................... 50 3.2 Service Requirements ........................................................................................................ 51 3.3 Parameters Description ...................................................................................................... 51 3.4 Configuration Procedure ..................................................................................................... 54 3.5 Test Service Configuration ................................................................................................. 67

Chapter 4 EPLAN Service Configuration using Station by Station Method ............................... 70 4.1 Laboratory Network Topology Introduction ......................................................................... 70 4.2 Service Requirement .......................................................................................................... 71 4.3 Parameters Description ...................................................................................................... 71 4.4 Configuration Procedure ..................................................................................................... 74 4.5Test Service Configuration .................................................................................................. 94

Chapter 5 EVPLAN Service Configuration using Station by Station Method ............................ 97 5.1 Laboratory Network Topology Introduction ......................................................................... 97 5.2 Service Requirement .......................................................................................................... 98 5.3 Parameters Description ...................................................................................................... 98 5.4 Configuration Procedure ................................................................................................... 103 5.5 Test Service Configuration ............................................................................................... 131

Chapter 6 EPL Configuration by Trail Method ......................................................................... 134 6.1 Laboratory Network Topology Introduction ....................................................................... 134 6.2 Service Requirement ........................................................................................................ 135 6.3 Parameters Description .................................................................................................... 135 6.4 Configuration Procedure ................................................................................................... 137

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iv

6.5 Test Service Configuration ............................................................................................... 144

Chapter 7 EVPL Configuration by Trail Method (VCTRUNK Shared) ..................................... 145 7.1 Laboratory Network Topology Introduction ....................................................................... 145 7.2 Service Requirements ...................................................................................................... 146 7.3 Parameters Description .................................................................................................... 146 7.4 Configuration Procedure ................................................................................................... 149 7.5 Test Service Configuration ............................................................................................... 158

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OHCNATS11 Ethernet Configuration Practice Guide

1

Course Instruction

About this course

This course is applicable to Huawei OptiX OSN 3500 product;

This course is mainly used for OptiX OSN 3500 Transmission Network Academy Certification Training purpose.

Course objectives

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

To get familiarize with the hardware device through the basic equipment configuration operation;

To get familiarize with the theory of Ethernet Service through different Ethernet service configuration;

To get familiarize with U2000 station by station configuration method for EPL, EVPL, EPLAN and EVPLAN;

To get familiarize with U2000 trail configuration method for EPL and EVPL.

Learning Notes

According to lab equipment availability, this lab experiment will be carried out in group rotation. You should be well prepared before the lab experiment in order to save time. There will be 5 sets of OptiX OSN 3500 and 1 set U2000 NMS computer. For the ID of each NE, please refer to the actual NE ID allocation.

Before doing any service configuration for this practice guide, you should be familiar with the basic operation of U2000 and PDH service configuration.

Relevant Materials

OptiX OSN 3500 product documentation

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2

Chapter 1 EPL Service Configuration using Station by Station Method

1.1 Laboratory Network Topology Introduction

The network topology diagram is as follows, the network elements (NEs) consist of 5 OptiX OSN 3500. The basic topology is form from a four NEs two-fiber bidirectional multiplex section protection ring with a non-protection chain. Pair slot of slot #7 and #12 is used in each NE in the ring network; slot #7 is connected to slot #12 in the next NE. A non-protection chain is form from NE A slot #6 connected to NE E slot #12. The GNE and board slot number can be changed according to the actual situation during the configuration. One N2EFS4 board is configured in every NE and the actual slot number for each board is shown as follows. The slot number can be flexibly adjusted according to actual configuration situation.

Network Elements Ethernet board slot number

NE A #5

NE B #5

NE C #5

NE D #5

NE E #5

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1.2 Service Requirement

Service requirement descriptionCompany H has two branches located at NE A and NE C needed an Ethernet service communication with 6Mbits/s bandwidth.

1.3 Parameters Description

EPL service of company H

SDH service link time slot number 1 to 3 of VC-12 in VC-4 #1 VC4-1:VC12:1-3is used for NE A and NE C, while service in NE B is configures as pass-through.

Time slot 1 to 3 of VC-12 in VC-4 #4 of N2EFS4 board in slot number 4 VC4-4:VC12:1-3 of NE A and NE C is used.

Parameters of external ports on the Ethernet board:

Parameter NE A NE C

Board N2EFS4 N2EFS4

Port PORT1 PORT1

Enabled/Disabled Enable Enable

Entry Detection Enable Enable

TAG Access Access

Default VLAN ID 100 100

Port Type PE PE

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Parameters of internal ports on the Ethernet boards:

Parameter NE A NE C

Board N2EFS4 N2EFS4

Internal Port VCTRUNK1 VCTRUNK1

Bound Path VC4-4:VC12-1VC12-3 VC4-4:VC12-1VC12-3

Entry Detection Enable Enable

TAG Tag Aware Tag Aware

Port Type PE PE

Parameters of the EPL serviceSame parameters on A and C:

Parameters EPL service of Company H

Board N2EFS4

Service Type EPL

Service Direction Bidirectional

Source Port PORT1

Source C-VLAN

(e.g. 1,3-6)

Null

Sink Port VCRTUNK1

Sink C-VLAN (e.g. 1,3-6) Null

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1.4 Configuration Procedure

Configuration at NE A Step 1 Configure Ethernet Port Parameters:

1 Login to U2000 Main Topology.

2 Right click on NE A to select NE Explorer.

3 Select N2EFS4 board from the Board List.

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4 From the Function Tree select Configuration> Ethernet Interface Management> Ethernet Interface.

5Select External Port.

6The diagram below shows the 4 external port of the Ethernet board, all the ports are disabled by default. Port 1 need to be enabled manually by double-click on the Enabled/Disabled tab for Port 1 and select Enabled as shown below.

After selecting, click the Apply button at the right bottom of the panel.

7Next, click on the TAG Attributes tab.

8At the TAG column, double-click and select Access for Port 1 follow by changing the Default VLAN ID to 100. After done selecting,

remember to click on the Apply button at the bottom right of the panel to activate the changes.

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Step 2 Configure Ethernet Line Service:

1At the Function Tree, select Configuration> Ethernet Service> Ethernet Line Service.

2As shown on the diagram below, at this moment there is not any service at this board. Click on the New button to create a new Ethernet Line service.

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3As shown in the diagram below is the Create Ethernet service configuration panel. Select PORT1 at the Source Port and VCTRUNK1 as the sink port. No changes are needed for the rest of the option as shown below.

4At this moment, the Bound Path panel is empty. We need to configure a bound path for the VCTRUNK1. Click the Configuration button, and the below diagram will be shown. Click on the >> button to

bound the timeslot needed to VCTRUNK1. At this time, we click 3 times on the >> button, as we have assigned 3 timeslots at the beginning of

the configuration which is VC4-4:VC12:1~3; total of 3 VC12s. Make sure the correct timeslot is bounded then click on the OK button at the bottom right of the panel and return to the Create Ethernet Line configuration panel.

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5Make sure the Ethernet Line configuration is configured correctly and click the OK button.

6System prompt will show that the configuration is successful. Confirm and close the system prompt dialog box.

7Finally the Ethernet Line service has been successfully created and the Ethernet service will be displayed in the Ethernet Line panel.

Step 3 Configure SDH service:

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1To configure a SDH service is to create a cross-connection between the Ethernet board and Line board. Select NE A at the NE explorer.

2 At the Function Tree, select Configuration> SDH Service Configuration.

3There should not have any service created yet at the SDH Service Configuration panel. Click on the Create button to create a new SDH

service.

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4At the Create SDH service panel, select the correct information from the options. (In this case, VC4-4 is selected for N2EFS4 board because only VC4-4 can support for VC-12 level virtual concatenation). After obtaining display as shown below, (The Source Slot and the Sink Slot position have to be the same as the actual board slot number), click OK.

5At this moment, the system will show a newly created SDH service on the panel, the necessary configuration at NE A station is done, you can now close the NE explorer of NE A.

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Configuration at NE B At station NE B, there is no add/drop of Ethernet service, therefore station NE B only need to create a pass-through SDH service. Configuration service steps is the same as previous, therefore only final result of the configured service is shown at diagram below.

Configuration at NE C Step 1 Configure Ethernet Port Parameters:

1Login to U2000 Main Topology.

2Right click on NE C to select NE Explorer.

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3Select N2EFS4 board from the Board List.

4From the Function Tree select Configuration> Ethernet Interface Management> Ethernet Interface.

5Select External Port.

6The diagram below shows the 4 external port of the Ethernet board, all the ports are disabled by default. Port 1 need to be enabled manually by double-click on the Enabled/Disabled tab for Port 1 and select Enabled as shown below.


7Next, click on the TAG Attributes tab.

8At the TAG column, double-click and select Access for Port 1 follow by changing the Default VLAN ID to 100. After done selecting,

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remember to click on the Apply button at the bottom right of the panel to activate the changes.

Step 2 Configure Ethernet Line service :


2As shown in the diagram below is the Create Ethernet service configuration panel. Select PORT1 at the Source Port and VCTRUNK1 as the sink port. No changes are needed the options as

shown below.

3At this moment, the Bound Path panel is empty. We need to configure a bound path for the VCTRUNK1. Click the Configure button,

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and the below diagram will be shown. Click on the >> button to bound

the timeslot needed to VCTRUNK1. At this time, we click 3 times on the >> button, as we have assigned 3 timeslots at the beginning of the configuration which is VC4-4:VC12:1~3; total of 3 VC12s. Make sure the correct timeslot is bounded then click on the OK button at the bottom

right of the panel and return to the Create Ethernet Line configuration panel .


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7Finally the Ethernet Line service has been successfully created and the Ethernet service will be displayed in the Ethernet Line panel .


1To configure a SDH service is to create a cross-connection between the Ethernet board and Line board. Select NE C at the NE Explorer.

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2 At the Function Tree, select Configuration> SDH Service Configuration.

3There should not have any service created yet at the SDH Service Configuration panel. Click on the Create button to create a new SDH

service.

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4At the Create SDH service panel, select the correct information from the options. (In this case, VC4-4 is selected for N2EFS4 board because only VC4-4 can support for VC-12 level virtual concatenation). After obtaining display as shown below, (The Source Slot and the Sink Slot position have to be the same as the actual board slot number), click OK.

5At this moment, the system will show a newly created SDH service on the panel, all the necessary configuration at NE C station is done, you can now close the NE explorer of NE C.

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1.5 Test Service Configuration

When all the configuration has been completed, the configurations have to be tested to make sure it works.

In order for us to test, two PCs are needed. Each PC is connected to port 1 of NE A and NE C. In the command prompt, use the ping command to test whether the services are configured successfully.

PCs with IP addresses of 188.20.7.100 and 188.20.7.101 were used for the ping test in this case. The results below show the EPL service is working normally.

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Chapter 2 EVPL Service Configuration using Station by Station Method (PORT-Shared)


The network topology diagram is as follows, the network elements (NEs) consist of 5 OptiX OSN 3500.

The basic topology is form from a four NEs two-fiber bidirectional multiplex section protection ring with a non-protection chain. Pair slot of slot #7 and #12 is used in each NE in the ring network; slot #7 is connected to slot #12 in the next NE. A non-protection chain is form from NE A slot #6 connected to NE E slot #12.

One N2EFS4 board is configured in every NE and the actual slot number for each board is shown as follows. The slot number can be flexibly adjusted according to actual configuration situation.


NE A #5

NE B #5

NE C #5

NE D #5

NE E #5

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2.2 Service Requirements

The headquarters of company H; H1 is located to NE A, while there are two branches which are H2 and H3 are located to NE B and NE D each. Both branches needed to have Ethernet communication with the headquarters and a bandwidth of 2Mbits/s is needed each.


The network planning is shown below:

1. EVPL service between company H headquarters, H1 and branch H2;

2. EVPL service between company H headquarters, H1 and branch H3;

EVPL service between company H headquarters, H1 and branch H2:

Use VC-12 timeslot number 4 of VC4 number 1 for SDH link between NE A and NE BVC4-1:VC12:4.

Use VC-12 timeslot number 4 of VC4 number 4VC4-4:VC12:4 of N2EFS4 board for NE A and VC-12 timeslot number 1 of VC4 number 4 VC4-4:VC12:1of N2EFS4 board for NE B to add drop services.

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Parameters of external Ethernet ports on the Ethernet boards:

Parameters NE A NE B

Board N2EFS4 N2EFS4

Port PORT2 PORT1

Enabled/Disabled Enabled Enabled

Entry Detection Enabled Disabled


Default VLAN ID

Port Type PE PE



Board N2EFS4 N2EFS4


Bound Path VC4-4:VC12-4 VC4-4:VC12-1


TAG Access Tag Aware

Default VLAN ID 100

Port Type PE PE

EPL Service Parameters (NE A station parameters):

Parameters EPL service of company H

Board N2EFS4

Service Type EPL


Source Port PORT2

Source Port C-VLAN(e.g.1,3-6)

100

Sink Port VCRTUNK2

Sink C-VLAN(e.g. 1,3-6) 100

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EPL Service Parameters (NE B station parameters):


Board N2EFS4

Service Type EPL


Source Port PORT1


100

Sink Port VCRTUNK2


EVPL service between company H headquarters, H1 and branch H3:

Use VC-12 timeslot number 1 of VC4 number 1 for SDH link between NE A and NE DVC4-1:VC12:1.

Use VC-12 timeslot number 5 of VC4 number 4VC4-4:VC12:5 of N2EFS4 board for NE A and VC-12 timeslot number 1 of VC4 number 4 VC4-4:VC12:1of N2EFS4 board for NE D to add drop services.


Parameters NE A NE D

Board N2EFS4 N2EFS4

Port PORT2 PORT1




Default VLAN ID

Port Type PE PE

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Parameters NE A NE D

Board N2EFS4 N2EFS4


Bound Path VC4-4:VC12-5 VC4-4:VC12-1


TAG Access Tag Aware

Default VLAN ID 200

Port Type PE PE

EPL Service Parameters (NE A station parameters):


Board N2EFS4

Service Type EPL


Source Port PORT2

Source C-VLAN(e.g. 1,3-6) 200

Sink Port VCRTUNK3


EPL Service Parameters (NE D station parameters):


Board N2EFS4

Service Type EPL


Source Port PORT1

Port C-VLAN(e.g. 1,3-6) 200

Sink Port VCRTUNK3


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1 Login to U2000 Main Topology.



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5select External Port.

6The diagram below shows the 4 external port of the Ethernet board,

all the ports are disabled by default. Port 2 needs to be enabled

manually by double-click on the Enabled/Disabled tab for Port 2 and

select Enabled as shown below.


7Select Internal Port. Change TAG Attributes of VCTRUNK1 and VCTRUNK2 to Access with VLAN ID of 100 and 200 respectively.

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1At the Function Tree, select Configuration> Ethernet Service>

Ethernet Line Service.

2As shown on the diagram below, there is an existing EPL service which is created in Chapter 1. As for now, click New to create a new

EVPL service between NE A and NE B.

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3In the Create Ethernet Service configuration panel, select PORT2 as Source Port , VCTRUNK2 as Sink Port and type in 100 for the

Source VLAN and Sink VLAN as shown below.

4At this moment, the Bound Path panel is empty. To configure a bound path to VCTRUNK2, click Configure button. At the Bound Path

panel, select VCTRUNK2 and click >> button. Click the OK button at the bottom right of the panel and return to the Create Ethernet Line configuration panel.

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7Finally the Ethernet Line service has been successfully created and the Ethernet service will be displayed in the Ethernet Line panel.

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8After configuring the EVPL service between NE A and NE B, now we have to configure EVPL service between NE A and NE D with VLAN ID 200 by clicking New and select the options as shown below.

9Click Configure , select VCTRUNK3 and bound VC12-5 by clicking >> button. Click OK when done.

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11The Ethernet Line service has been successfully created and you will see 3 EPL Ethernet service in the Ethernet Line panel.

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2 At the Function Tree, select Configuration> SDH Service

Configuration.

3There is an existing SDH service from the configuration in Chapter 1, Click on the Create button to create another new SDH service.

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4At the Create SDH service panel, select the correct information from

the options for NE A. (In this case, VC4-4 is selected for N2EFS4 board

because only VC4-4 can support for VC-12 level virtual concatenation).

After obtaining display as shown below, (The Source Slot and the

Sink Slot position have to be the same as the actual board slot

number), click OK.

5Then, configure SDH service for Ne D as shown below and click OK.

6The SDH service created will be displayed as shown below.

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Configuration at NE B Step 1 Configure Ethernet Port Parameters:


2Right click on NE B to select NE Explorer.

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all the ports are disabled by default. Port 1 need to be enabled manually

by double-click on the Enabled/Disabled tab for Port 1 and select

Enabled as shown below.


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7Next, click on the TAG Attributes tab. At the TAG column, double-click and select Access for Port 1 follow by changing the Default VLAN ID to 100. After done selecting, remember to click on the

Apply button at the bottom right of the panel to activate the changes.

8Select Internal Ports and change the Entry Detection of VCTRUNK 2 to Disabled.



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2Click New, select PORT 1 as the Source Port and VCTRUNK2 as the sink port. Fill in 100 for both Source VLAN and Sink VLAN.

3Click Configure and click on >> button to bound VC12-1 into VCTRUNK1 and click OK.

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4 After verifying the Bound Path at the Create Ethernet Service configuration, click OK.



1To configure a SDH service is to create a cross-connection between the Ethernet board and Line board. Select NE B at the NE explorer.


Configuration.

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3 To create a new SDH service, click on the Create button.

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the options for NE B. (In this case, VC4-4 is selected for N2EFS4 board




number), click OK.

5The SDH service has been successfully created and the SDH service

is shown as below in the panel.

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Configuration at NE D Step 1 Configure Ethernet Port Parameters:


2Right click on NE D to select NE Explorer.


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all the ports are disabled by default. Port 1 need to be enabled manually

by double-click on the Enabled/Disabled tab for Port 1 and select

Enabled as shown below.


7Next, click on the TAG Attributes tab. At the Entry Detection column, change the Entry Detection of Port 1 to Disabled.

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8Select Internal Ports and change VCTRUNK3 Entry Detection to Disabled.



2Click New, select PORT 1 as the Source Port and VCTRUNK3 as the sink port. Fill in 200 for both Source VLAN and Sink VLAN.

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3Click the Configure button and select VCTRUNK3. Click on >> button to bound VC12-1 into VCTRUNK3 and click OK.

4After verifying the Bound Path at the Create Ethernet Service configuration, click OK.


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1To configure a SDH service is to create a cross-connection between

the Ethernet board and Line board. Select NE D at the NE explorer.


Configuration.

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3To create a new SDH service, click on the Create button.


the options for NE D. (In this case, VC4-4 is selected for N2EFS4 board




number), click OK.

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5The SDH service has been successfully created and the SDH service

is shown as below in the panel.

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2.5 Test Service Configuration

When all the configuration has been completed, the configurations have to be tested to make sure it works. First, you must make sure the Tag Attributes of the external port of NE A is configured as Access (PCs cannot ping each other when the ports are in Tag Aware mode as PCs do not have VLAN IDs.

Test Ethernet Service between NE A and NE B: Two PCs are needed to test the connectivity, connect two PCs to port 2 of Ethernet board in NE A and port 1 of Ethernet board in NE B each.

PCs with IP addresses of 188.20.7.100 and 188.20.7.101 were used for the ping test in this case. The results below show the EPL service is working

normally.

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Test Ethernet Service between NE A and NE D: Two PCs are needed to test the connectivity, connect two PCs to port 2 of Ethernet board in NE A and port 1 of Ethernet board in NE D each.

PCs with IP addresses of 188.20.7.100 and 188.20.7.101 were used for the ping test in this case. The results below show the EPL service is working normally.

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Chapter 3 EVPL Service Configuration using Station by Station Method (VCTRUNK Shared)


The network topology diagram is as follows, the network elements (NEs) consist of 5 OptiX OSN 3500.

The basic topology is form from a four NEs two-fiber bidirectional multiplex section protection ring with a non-protection chain. Pair slot of slot #7 and #12 is used in each NE in the ring network; slot #7 is connected to slot #12 in the next NE. A non-protection chain is form from NE A slot #6 connected to NE E slot #12.

One N2EFS4 board is configured in every NE and the actual slot number for each board is shown as follows. The slot number can be flexibly adjusted according to actual configuration situation.


NE A #5

NE B #5

NE C #5

NE D #5

NE E #5

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3.2 Service Requirements

Branch H1 of company H and branch G1 of Company G are both located at NE A. While branch H2 of company H and branch G2 of company G are both located at NE B. Both companies needed an Ethernet service of bandwidth of 6Mbits/s to communicate with each other.

The services of company H need to be isolated from the services of company G. Traffic of company H and G, however, is complementary in terms of bandwidth.


The network planning is shown below:

1. EVPL service for Company H between branch H1 and branch H2;

2. EVPL service for Company G between branch G1 and branch G2;

EVPL service for Company H between branch H1 and branch H2:

Use VC-12 timeslot 1 to 3 of VC-4 number 1 for SDH link between NE A and NE B VC4-1:VC12:1-3

Use VC-12 timeslot number 1 to 3 of VC-4 number4VC4-4:VC12:1-3of N2 EFS4 board for both NE A and NE B.



Board N2EFS4 N2EFS4

Port PORT1 PORT1


Entry Detection Enabled Enabled

TAG Access Access


Port Type PE PE

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Boards N2EFS4 N2EFS4


Bound Path VC4-4:VC12-1~3 VC4-4:VC12-1~3



Default VLAN ID

Port Type PE PE

EPL Service Parameters (NE A and NE B station parameters):


Board N2EFS4

Service Type EPL


Source Port PORT1


100

Sink Port VCRTUNK1

Sink C-VLAN

(e.g. 1,3-6)

100

EVPL service for Company G between branch G1 and branch G2:

Use VC-12 timeslot number 4-6 of VC4 number 1 for SDH link between NE A and NE BVC4-1:VC12:4-6.

Use VC-12 timeslot number 4 to 6 of VC-4 number 4VC4-4:VC12:4-6of N2 EFS4 board for both NE A and NE B.

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Board N2EFS4 N2EFS4

Port PORT2 PORT2



TAG Access Access


Port Type PE PE



Board N2EFS4 N2EFS4


Bound Path VC4-4:VC12-1~3 VC4-4:VC12-1~3



Default VLAN ID

Port Type PE PE

EPL Service Parameters (NE A and NE B station parameters):

Parameters EPL service of company G

Board N2EFS4

Service Type EPL


Source Port PORT2


200

Sink Port VCTRUNK1

Sink C-VLAN

(e.g. 1,3-6)

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5 select External Port.

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all the ports are disabled by default. Port 1 and Port 2 needs to be

enabled manually by double-click on the Enabled/Disabled tab for Port

1 and 2 and select Enabled as shown below.


7Click on the TAG Attributes tab, change the TAG to Access for Port 1 and Port 2 follow by changing the Default VLAN ID to 100 for Port 1

and VLAN ID to 200 for Port 2. Click Apply button to activate

changes.



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2On the panel, select New button to create new EVPL service between NE A and NE B for company H. In the Create Ethernet Service configuration panel, select PORT 1 as Source Port, VCTRUNK1 as Sink Port and type in 100 for the Source VLAN and Sink VLAN as shown below.

3At this moment, the Bound Path panel is empty. To configure a bound path to VCTRUNK1, click Configure button follow by >> button

for 3 times to bound VC12-1 to 3. Click the OK button at the bottom right of the panel and return to the Create Ethernet Line configuration panel.

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7Now, configure EVPL service for company G. Click New button and select PORT2 as Source Port , VCTRUNK1 as Sink Port and type in 200 for the Source VLAN and Sink VLAN as shown below.

8Finally the Ethernet Line service has been successfully created and the Ethernet service for both company H and G will be displayed in the Ethernet Line panel.

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Configuration.

3At the SDH Service Configuration panel, click New to create

cross-connection service for company H and G.

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the options for NE A as shown below. (In this case, VC4-4 is selected for

N2EFS4 board because only VC4-4 can support for VC-12 level virtual

concatenation). Click OK . (The Source Slot and the Sink Slot

position have to be the same as the actual board slot number).

5The SDH service created will be displayed as shown below.

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