MPLS VPN Implementation: Connecting Offices through Secure Networks

The VLN Core is a mesh network that connects offices using Ethernet connections. The assignment content discusses the implementation of MPLS VPN (Multiprotocol Label Switching Virtual Private Network) in a service provider network, including the use of OSPF (Open Shortest Path First) protocol and MP-BGP (Multi-Protocol Border Gateway Protocol). The network is designed to provide secure communication between offices in various locations. It also highlights the importance of MPLS VPN services in traditional IPv4 networks.

Qwertyuiolkjhgfdazxcvbnmk
dchgsjjshgysuujhnbsjichgxhk
cnbxiikcjnxjjicoxjnxjkjdvdhvj
djvsjfuhdnvkjdnvjndvkjbdkjv
biudhgausjdnlkasndiajduah
wdiuahduudkjaschuoshcuias
hiuchsaiucuasjbcuabcujadsh
cuiagsdyiawodihsuchsiugfcjf
agfiyuagfiygafiygaiyfgaiyfgiy
agfiagfiagifugaiufgiaufgiaugfi
uafiugfiuagfiuaegfiugaefiuco
18090130957655
[Type the document subtitle]
[Pick the date]

Table of Contents
Introduction...........................................................................................................................................2
MPLS VPN and CISCO 2811....................................................................................................................3
Network Implementation......................................................................................................................4
Connections Implemented....................................................................................................................4
CE—Customer's edge router and C—Customer's router.......................................................................5
P—Provider's core router and PE—Provider's edge router...................................................................5
Configuration of Routers.......................................................................................................................6
Establishing a Connection between PE Routers....................................................................................6
PE to CE Link Implementation...............................................................................................................6
Implementation and Methodology.......................................................................................................7
Conclusion.............................................................................................................................................7
References.............................................................................................................................................9

Introduction
The Following Report is an overview of the establishing a network between the offices in
various locations. Each place has its own working and its importance. They also must have
some privacy since there will be some managerial information transfers for the company. So
we have to provide the networking based on the requirement. The proposed Method in this
type is MPLS VLN .This Method is used since it is reliability and quality of service (QoS)
compared to other WAN connectivity is high. With MPLS, the carrier handles WAN routing
protocol. This means we don't have to, which makes MPLS operationally simpler than
managing a large routed network. This means, in turn, that companies can able to fewer the
manpower on WAN/router. MPLS is an IP technology developed by IETF to overcome the
drawbacks of traditional IP routing. MPLS is a technique used by service providers to
provide for a better and single network infrastructure for real-time traffic in voice and video.
MPLS VPN and CISCO 2811
Multiprotocol Label Switching (MPLS) provides the mechanisms to perform label
switching, which is an innovative technique for high-performance packet forwarding. MPLS
and VPNs provides the first in-depth discussion particular to Cisco’s MPLS architecture.
Multiprotocol Label Switching and Virtual Private Networks has a major application using
MPLS theory and configuration, network design issues, etc...
In this type of network we are using MPLS VLN Method i.e. Multiprotocol Label
Switching has become a key technology in Internet Protocol technique for service
providers and corporations that prefer to use remote connectivity. Enterprises are mainly
attracted towards service providers which provide MPLS VPNs. It has a large number of
customers due to the certain advantages over other VPN technologies like Frame Relay
and ATM. Since there are many unique features possessed by MPLS VPN, such as VoIP
by CoS, scalable bandwidth, voice and data on a single platform through various sources,
today MPLS VPN has become the leading technology in IP technology. We are using
CISCO 2811 which provides Wire-speed performance for concurrent services such as
security and voice, and advanced services to multiple T1/E1/xDSL WAN rates it also
Support for majority of existing AIMs, NMs, WICs, VWICs, and VICs

Network Implementation
The Network comprises a connection between three offices in three different places
namely, LON (head office), PAR and US and each place has its own working. The LON
offices takes care of the Management and finance sectors.PAR offices has a HR team and a
IT team Working and finally the production Dept is in US.
The LON office is directly connected with the fast Ethernet since it takes care of the
financial and management side. PAR office is also connected with the core MPLS, the
connection from PAR to LON exists through this MPLS VLN mesh. All the three Offices
are connected to a central hub known as MPLS VLN .The link between LON and PAR
are producted by implementing IPSec protocol. The production house in US does not have
a access to LON or PAR offices because there must a privacy in managerial functions.
When the packet enters the MPLS topology, LSR receives the packet and
imposes the MPLS label to the packet and forwards to the next hop via the Label Switch
Path. When the packet reaches the next LSR, it swaps the incoming label with the outgoing
label and transmits the packet. When the LSR receives the packet, it strips off the packet
label and forwards it to the destination router. All the LSRs present in the MPLS network
have a separate Interior Gateway Protocol (IGB) (e.g., EIGRP, RIP, OSPF, etc.) running
throughout the network. To fulfil the distribution task, adjacent LSRs must agree on the
label that is used for each IGP prefix
Connections Implemented
MPLS VLN Core is the mesh from where each and every offices is connected using
Ethernet in each office there are several connections based on the requirement. In LON
office the finance side has about 30 users and management side comprises 20 users.
Similarly in PAR office there are 20 users in IT side and 20 users in HR side. In US there
are about 100 users.
There are two routers in the service provider network, they are Provider Edge (PE)
and Provide (P) routers. The Provider Edge router is connected to the Customer Edge (CE)
router of the customer networks. Both Provider Edge (PE) and Provider (P) routers should

run in MPLS so that they can distribute labels to each other and forward packets to
subsequent routers.
CE—Customer's edge router and C—Customer's router
CE and C refers to the information presented in this document was created from
devices in a specific lab environment. All of the devices used in this technique has a
cleared (default) configuration provided by the router protocol. We need to consider that if
working in a live network we have to provide the keen and essential commands for
potential. In our network LON, PAR, and US are considered as CE While C refers to the
final routers such as Management, HR, IT, finance and production department of their
respective offices.
P—Provider's core router and PE—Provider's edge router
P Router in Multiprotocol Label Switching (MPLS) or Provider Router is a Label
Switch Router (LSR) that functions as a transit router of the core network. The P Router is
can be connected to one or more PE Routers. A PE router (Provider edge router) is a router
located on the customer premises that provides an Ethernet interface between the
customer's LAN and Provider router
The company comes out with separate IP providers for various offices,
LON (head office) 10.25.25.2/30
PAR 10.25.25.2/30
US 10.25.25.18/30
Since PAR and LON have direct MPLS VPN links they are provided with a same PE
router configuration and also they are secured using a Internet Protocol Security is a
framework of open standards for providing privacy, secured communications all over
Internet Protocol (IP) networks, with the help of cryptographic security services. It is
shortly called as IPSec

Configuration of Routers
Configuration process starts with Enabling ip cef. in order to enable ip cef we have to
create one VRF for each VPN connected using the ip vrf command we also have to Specify
the correct route distinguisher used for that VPN. This is used to extend the IP address so that
you can identify which VPN it belongs to. Then we have to set up the import and export
properties for the MP-BGP extended communities. These are used for filtering the import and
export process Next Step is to Configure the forwarding details for the respective interfaces
using the ip vrf forwarding command and remember to set up the IP address after doing this.
Depending on the PE-CE routing protocol you are using, you can configure static routes or
routing protocols (RIP, Open Shortest Path First [OSPF], or BGP) between PE and CE.
Detailed configurations are available on the MPLS over ATM Support page.
For the implementation of MPLS VPN, routers must require the following hardware
and software requirements to support the MPLS VPNs. Router that support MPLS topology
Cisco IOS. Software that provides with VPN features and a 64 MB of flash to support IOS
with at least 192 DRAM. For CE routers, we can use any router that can be able to provide
routing information with its PE routers.
Establishing a Connection between PE Routers
Configure MP-BGP between the PE routers. There are several ways to configure
BGP, such as using the route reflector or confederation methods. The method used here—
direct neighbour configuration—is the simplest and the least scalable. Declare the different
neighbours for connection. Provide a address-family ipv4 vrf command for each VPN
present at this PE route then we have to Redistribute the static routing, RIP, or OSPF
information along the routers of PE so that they can be able to communicate with their
respective customer edge routers. Then Provide address-family vpnv4 mode, and Activate the
neighbours specify that extended community must be used in this process.

PE to CE Link Implementation
In this Method of networking ,service providers to configure Open Shortest Path First
(OSPF) between provider edge (PE) and customer edge (CE) devices in an MPLS VPN
network. This has increased flexibility when devices exchange routing information among
sites because a separate router ID for each interface or sub interface is provided and
configured on a PE device attached to multiple CE devices within a VPN.The first option is
to run static routing between both PE- and CE-routers routing. An Important technique that
is established in OSPF is Interior Gateway Protocols (IGP). In an MPLS, OSPF is not used to
route customer traffic. It is only used to provide routing for the internal provider network so
that labels can be generated. LDP is used to advertise these labels to neighbouring label-
switched routers hence IGP provides a keen role in making the OSPF to communicate
Implementation and Methodology
An MPLS network is a backbone network comprised of MPLS-enabled routers called
Label Switch Routers (LSR). This network consists of a core LSR with an edge LSR that
applies labels to packets. The working is implemented by Routing tables of the different
LSRs are computed along with an Interior Gateway Protocol (IGP). A link-state protocol,
such as Open Shortest Path First (OSPF) is required if we have networking to deploy MPLS
TE.
This module provides the interaction between multi-protocol Border Gateway
Protocol (MP-BGP) running between Provider Edge routers (PE-routers) and Open Shortest
Path First (OSPF) protocol running inside a Virtual Private Network (VPN) implemented
with MPLS VPN technology. The OSPF routes received by one PE-router can be propagated
across the MPLS backbone and redistributed back into OSPF at another site as external OSPF
routers
Conclusion
Hence through this techniques and implementation methods, we can able to provide a
communication with offices in various location with a secured manner. It provides effective
methods of technologies and protocols to solve the most pressing network-design problems.

It helps to determine the importance of applying MPLS VPN in the traditional IPv4 network.
MPLS VPN services provide significant bandwidth between service provider network and
customer site to fulfil the requirements of VoIP. Because of these features like scalable
bandwidth, convergence of video, voice and data in a single infrastructure, MPLS VPN has
become the leading technology in IP technology.
References
Services, P., Routers, B., Products, E. and Routers, C.. 2018. Cisco 2811 Integrated
Services Router. [online] Cisco.. [ONLINE] Available

at: https://www.cisco.com/c/en/us/products/routers/2811-integrated-services-router-
isr/index.html. [Accessed 3 September 2018].
Gurung, S. 2018. IMPLEMENTATION OF MPLS VPN. [ONLINE] Available
at: https://www.theseus.fi/bitstream/handle/10024/103442/Sanjib
%20Gurungthesis.pdf?sequence=1. [Accessed 3 September 2018].
Ijettjournal. 2018. A Design Analysis of MPLS VPN Core Architecture and Network
Downtime Impact. [ONLINE] Available
at: http://ijettjournal.org/2016/volume-33/number-3/IJETT-V33P224.pdf. [Accessed 3
September 2018].
Omicsonline.org. (2018). 2018. Architecture for MPLS L3 VPN Deployment in
Service Provider Network. [ONLINE] Available at: https://www.omicsonline.org/open-
access/architecture-for-mpls-l3-vpn-deployment-in-service-provider-network-2167-
0919-1000152.pdf. [Accessed 3 September 2018].
Racf.bnl.gov. (2018).. 2018. Using OSPF in an MPLS VPN Environment. [ONLINE]
Available at: https://www.racf.bnl.gov/Facility/TechnologyMeeting/Archive/06-30-04-
CISCO/Using-OSPF-in-MPLS-VPN-Environment.pdf. [Accessed 3 September 2018].