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Đề tài : QoS over MPLS for Hutech network
Supervisor: Nguyễn Đức Quang QoS over MPLS for Hutech network
Student: Trần Quang Hải Đăng - 1 -
Table of Contents
Architecture of Subject 4
Relation Words 5
Multiprotocol label switching 6
Actuality of MPLS at VietNam 6
Advantage of MPLS 8
Disadvantage of MPLS 8
Icon use in subject 9
CHAPTER 1: INTRODUCTION ABOUT NETWORK
SYSTEM OF HUTECH UNIVERSITY 10
1.1. Description about network system of Hutech University. 11
1.2. Important problem and solution. 11
1.3. Task of subject 12
CHAPTER 2: QOS OVER MPLS NETWORK 13
Part 1: Overview about MPLS 14
2.1. Architecture of MPLS packet 15
2.1.1. Label. 15
2.1.2. Experimental 15
2.1.3. Bottom of Stack. 15
2.1.4. Time to Live 16
2.2. Operating of MPLS network. 16
2.2.1. MPLS domain. 16
2.2.2. Ingress and egress node. 17
2.2.3. Label Switch Router. 17

2.11.3. Uniform Model. 55
2.12. Steps implement QoS over MPLS 57
Supervisor: Nguyễn Đức Quang QoS over MPLS for Hutech network
Student: Trần Quang Hải Đăng - 3 -
CHAPTER 3: NETWORK DESIGN AND IMPLEMENT 58
3.1. Building solution for Hutech network 60
3.1.1. Real model of Hutech network. 60
3.1.2. Solution model for Hutech network 61
3.2. Building simulation model to resolve for Hutech network 62
3.2.1. Simulation model 62
3.2.2. Implement QoS over MPLS in simulation model. 64
3.3. Get Result. 72
Get Result and Define of develop in Subject 74
References 75
Index 76
Supervisor: Nguyễn Đức Quang QoS over MPLS for Hutech network
Student: Trần Quang Hải Đăng - 4 -
Architecture of subject
Subject includes three chapters:
Chapter 1: Introduction about network system of Hutech University, problem of
Hutech network system, solution to resolve.
Chapter 2: Chapter 2 includes three parts.
Part 1: Overview about MPLS, architecture MPLS packet, operation of MPLS
network, command line for configure MPLS operation.
Part 2: Overview about QoS, architecture of QoS, classification, marking and
queuing tool.
Part 3: QoS over MPLS, relative about IPP, DSCP and MPLS EXP, DiffServ with
IP packet and MPLS packet, DiffServ tunneling mode, steps implement QoS over
MPLS network.
Chapter 3: Network design and implement. Deploy QoS over MPLS, get result

be forwarded at the layer 2 (switching) level rather than at the layer 3 (routing)
level. In addition to moving traffic faster overall, MPLS makes it easy to manage a
network for quality of service (QoS). For these reasons, the technique is expected
to be readily adopted as networks begin to carry more and different mixtures of
traffic.
Actuality of MPLS at VietNam
-With VietNam, MPLS deployment are building in communication network at
VNPT head of company VietNam. With VoIP project is deploying, VNPT
established an axle MPLS network with three LSR core. LSRs edge will be
invested and extended at places have large demand as Hai Phong, Quang Ninh at
north, Da Nang, Khanh Hoa…at medium, Binh Duong, Dong Nai, Ba Ria – Vung
Tau…at south. Next, FPT Telecom, Viettel, electricity are taked part and create
competition environment with high QoS and cheap.
- Present, not including companies and foreign office representative, there are a
lot of home companies in finance field, insurance, bank use this service (Bao Viet
insurance company, Dong A bank…). Beside that, arrange state as Ministry of
Finance, customs, treasury, tax associated together by VPN/MPLS.
-VPN/MPLS technology officially deployed, applied and test successfully and
inserted to exploited from 2003 by VDC. 2004, VPN MPLS solution of VDC
Supervisor: Nguyễn Đức Quang QoS over MPLS for Hutech network
Student: Trần Quang Hải Đăng - 7 -
saved up technology information IT Week 14 gold cup and extended to exploited
on all 64 provinces of all the country with trade name VPN/VNN.
- VPN/VNN MPLS solution of VDC apply and deploy to rely on pass and
device technology of Cisco, with target create a network solution safe, security,
slow late and intergrate with each apply as Data, Voice, Video…
Price for first setup: include price for setup and link to MPLS/VNN
Order
Speed
Price for channel

TDNH
(VND/port /month)
Price for all
(VND/port /month)
1
64Kbps
609,000
958,000
2
128Kbps
875,000
1,447,000
3
192Kbps
1,104,000
1,694,000
4
156Kbps
1,370,000
1,941,000
5
384Kbps
1,705,000
2,415,000
6
512Kbps
2,114,000
2,994,000
7
768Kbps

20,529,000
15
10Mbps
25,661,000
16
34Mbps
24,536,000
33,034,000
17
45Mbps
42,173,000
63,964,000
Advantage of MPLS:
-Security (absolute security in core MPLS network and local loop network).
-Flexible (Easy for wire-open).
-Easy for administrator control.
Disadvantage of MPLS:
-VietNam has limit human resource for control MPLS network system.
-Device support MPLS network is limit.
Supervisor: Nguyễn Đức Quang QoS over MPLS for Hutech network
Student: Trần Quang Hải Đăng - 9 -
Icon use in subject
Supervisor: Nguyễn Đức Quang QoS over MPLS for Hutech network
Student: Trần Quang Hải Đăng - 10 -
CHAPTER 1: INTRODUCTION ABOUT NETWORK
SYSTEM OF HUTECH UNIVERSITY
Supervisor: Nguyễn Đức Quang QoS over MPLS for Hutech network
Student: Trần Quang Hải Đăng - 11 -
1.1. Description about network system of Hutech University.
Hutech University include three branches, branch 1 at Binh Thanh distinct, branch

Supervisor: Nguyễn Đức Quang QoS over MPLS for Hutech network
Student: Trần Quang Hải Đăng - 14 -
PART 1: OVERVIEW ABOUT MPLS
Supervisor: Nguyễn Đức Quang QoS over MPLS for Hutech network
Student: Trần Quang Hải Đăng - 15 -
2.1. Architecture of MPLS packet.
MPLS label is a field with 32 bit with hard architecture.
Figure 2.1 - MPLS label architecture.
2.1.1. Label.
Label include 20 bit in header MPLS, their value between 0 to
2
20
–1 and it has
1,048,575 labels. However, 16 value labels first aren’t use. In IP network,
transport packets must use IP source and IP destination, but with MPLS network,
packets are transport by label. Routers use label instead for IP address.
2.1.2. Experimental.
From bit 20 to bit 22 is exp field, three bits used for quality of services. Exp bit
similar Precedence bit in IP header. In IP network, implement quality of service is
use IP Precedence or DSCP, but with MPLS network is use Experimental.
2.1.3. Bottom of Stack.
Bit 23 BoS (Bottom of Stack) in MPLS header, if label is bottom of stack, it has
value 1, if label isn’t bottom of stack it has value 0.
Figure 2.2 – Label of Stack.
Supervisor: Nguyễn Đức Quang QoS over MPLS for Hutech network
Student: Trần Quang Hải Đăng - 16 -
In MPLS network, when transport packets, every router in MPLS network is use
label for forward packets to exactly destination, router is use label table.
2.1.4. Time to Live.
From bit 24 to bit 31 are used for TTL (Time to Live) field. This field similar TTL

front of the packet, and send it on a data link.
Egress LSRs receive labeled packets, remove the label(s), and send them on a
data link. Ingress and egress LSRs are edge LSRs.
Intermediate LSRs receive an incoming labeled packet, perform an operation
on it, switch the packet, and send the packet on the correct data link.
An LSR can do the three operations: pop, push, or swap.
It must be able to pop one or more labels (remove one or more labels from the top
of the label stack) before switching the packet out. An LSR must also be able to
push one or more labels onto the received packet. If the received packet is already
labeled, the LSR pushes one or more labels onto the label stack and switches out
the packet. If the packet is not labeled yet, the LSR creates a label stack and pushes
it onto the packet. An LSR must also be able to swap a label. This simply means that
when a labeled packet is received, the top label of the label stack is swapped with a
new label and the packet is switched on the outgoing data link.
An LSR that pushes labels onto a packet that was not labeled yet is called an
imposing LSR because it is the first LSR to impose labels onto the packet. One
that is doing imposition is an ingress LSR. An LSR that removes all labels from
Supervisor: Nguyễn Đức Quang QoS over MPLS for Hutech network
Student: Trần Quang Hải Đăng - 18 -
the labeled packet before switching out the packet is a disposing LSR. One that
does disposition is an egress LSR.
2.2.4. Label Switch Path.
A label switched path (LSP) is a sequence of LSRs that switch a labeled packet
through an MPLS network or part of an MPLS network. Basically, the LSP is the
path through the MPLS network or a part of it that packets take. The first LSR of an
LSP is the ingress LSR for that LSP, whereas the last LSR of the LSP is the egress
LSR. All the LSRs in between the ingress and egress LSRs are the intermediate
LSRs.
Figure 2.4- Label Switch Path
2.2.5. Forwarding Equivalent Class.

each LSR. The label operation (swap, push, pop) is known to each LSR by looking
into the LFIB. The LFIB (which is the table that forwards labeled packets) is fed
by the label bindings found in the LIB. The LIB is fed by the label bindings
received by LDP, Resource Reservation Protocol (RSVP), MP-BGP, or statically
assigned label bindings. Because RSVP distributes the labels only for MPLS
traffic engineering and MP-BGP distributes the labels only for BGP routes, you
are left with LDP for distributing all the labels for interior routes. Therefore, all
directly connected LSRs must establish an LDP peer relationship or LDP session
between them. The LDP peers exchange the label mapping messages across this
LDP session. A label mapping or binding is a label that is bound to a FEC. The
Supervisor: Nguyễn Đức Quang QoS over MPLS for Hutech network
Student: Trần Quang Hải Đăng - 20 -
FEC is the set of packets that are mapped to a certain LSP and are forwarded over
that LSP through the MPLS network. LDP has four major functions:
-The discovery of LSRs that are running LDP
-Session establishment and maintenance
-Advertising of label mappings
-Housekeeping by means of notification
When two LSRs are running LDP and they share one or more links between them,
they should discover each other by means of Hello messages. The second step is
for them to establish a session across a TCP connection. Across this TCP
connection, LDP advertises the label mapping messages between the two LDP
peers. These label mapping messages are used to advertise, change, or retract label
bindings. LDP provides the means to notify the LDP neighbor of some advisory
and error messages by sending notification messages.
2.3. Command for configure MPLS.
Command used for configure MPLS operate
Command used for verify MPLS operate
Supervisor: Nguyễn Đức Quang QoS over MPLS for Hutech network
Student: Trần Quang Hải Đăng - 21 -

the reserve RSVP command flow back to the originator, each router completes the
reservation. What does it mean for the router to “reserve” something? In effect, the
router reserves the correct queuing preferences for the flow, such that the
appropriate amount of bandwidth is allocated to the flow by the queuing tool.
RSVP can also request a certain (low) amount of delay, but implementing a
guarantee for delay is a little more difficult; IOS, for instance, just reserves the
queuing preference. In fact, IntServ RFCs actually define the term “guarantee” as
a relatively loose goal, and it is up to the actual implementation to decide how
rigorous or general to make the guarantees. RSVP continues signaling for the
entire duration of the flow. If the network changes, or links fail and routing
convergence occurs, the network may no longer be able to support the reservation.
Therefore, RSVP reserves the bandwidth when the flow initializes and continues
to ensure that the flow can receive the necessary amount of bandwidth. IntServ has
some obvious disadvantages, and it has several advantages. IntServ actually
predates DiffServ; DiffServ, to some degree, was developed to provide an
Internet-scale QoS model, because IntServ scales poorly. IntServ expects the hosts
to signal for service guarantees, which brings up two issues—whether the hosts
can be trusted by the network and whether the hosts actually support RSVP.
Alternatively, routers can be configured to reserve bandwidth on behalf of hosts,
but the configuration can quickly become an administrative problem because