Multiservice MPLS Network

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Multiservice MPLS Network

In 2006, Datagroup started the process of switching from SDH/Frame Relay to MPLS/Metro-Ethernet technology, which has higher speed, optimally utilizes the physical environment (optic fiber), is more flexible, scalable, comfortable in control and operation, and enables to reduce both capital expenditure and operational costs for deployment and operation.

Thus, a multiservice broadband MPLS network in most Ukrainian regional centers has been arranged, and the first stage of arrangement of a MPLS/Metro-Ethernet network in Kiev, Kharkov, Lutsk, Odessa, Donetsk, Dnepropetrovsk, Zaporozhye, Krivoy Rog, Vinnitsa, and some other cities has been completed. Multiservice broadband MPLS network has high performance, scalability, fault tolerance and security, and is ready to deployment of new services. Availability of an advanced QoS functionality ensures possibility to make and strictly control Service Level Agreements (SLA).

In the end of 2008, modernization of 11.5 thousand km long backbone DWDM network was completed. In the first half of 2008, the «Eastern Ring» of the network was upgraded — capacity of backbone (toll) fiber optic channels was increased from 3 Gbit to 10 Gbit. In the second half of the last year, upgrade of the «Western Ring» was completed — the network capacity for transit of international Internet traffic into Ukraine was also extended up to 10 Gbit.

Besides, in this year, works on extension of MPLS/Metro-Ethernet networks are performed in the cities having optic infrastructure, including Kiev, Kharkov, Lutsk, Odessa Donetsk, Dnepropetrovsk, Zaporozhye, Krivoy Rog, Vinnitsa, and some other cities.

Prerequisites for starting migration to MPLS technology:

Increasing demand for the services requiring broad bandwidths
Due to improper traffic aggregation, the necessity to constantly increase capacity of SDH network (from STM-1 to STM-64), which leads to a high volume of capital expenditure and reduction of profitability
Competition with other operators having started to adopt similar technologies
Launch of the national DWDM-based network, which resulted in increase of demand for different services in regions
Possibility to provide multilevel quality of service for different services
Need for entry into the mass market and deployment of additional services (value added services) for corporate and private users.

Virtual Ethernet Leased Line (E-Linе)

In description of this service the terms Ethernet Leased line (E-Line), VPWS (Virtual Private Wire Service), Point-to-Point Virtual Leased Line (PT2PT VLL), ePIPE, and Ethernet Wire Service (EWS) are also widely used. This service is fully transparent for a customer and actually represents an analogue of a leased line between two points with two Ethernet interfaces. This service is an effective tool for substitution of leased lines.

Virtual Distributed Switch (E-LAN)

In description of this service the following terms are also widely used: Ethernet Multipoint Service (EMS), E-LAN, VPLS (Virtual Private LAN Service), and H-VPLS (Hierarchical VPLS).

This is a switched Ethernet service, by which a second level transport is provided, and, from the point of view of the customer, the service looks as if in different cities it were provided with ports of a single Ethernet switch in a local network, and all remote points are located in a single flat LAN segment. However, since this service assumes using a MPLS network, the technology makes it possible to arrange on it a topology of almost any complexity, and enables flexible control of different traffic types and advanced QoS support.

Connection between business units
Internet access
Connection to mobile operators
Access to banking service providers
Access to NBU Central Clearing House • Reuters (including Xtra and Xtra+ products)
S. W. I. F. T. (by means of Equant or ProFIX Swift Service Bureau)
Connection to processing centers (UPC, UkrCart, Privatbank, UkrEximbank, PUMB).

High-speed access to different services

The above mentioned services constitute a basis on which a data transfer network for any corporate customer may be arranged. In addition to arrangement of such network, it is possible to provide a high-speed (so far up to 1 Gbps) access to the services that are normally necessary for most corporate customers. Such services include:

Brief comparison of Frame-Relay and MPLS technologies

FRAME RELAY MPLS METRO ETHERNET
Most adjusted for provision of services of point-to-point type. Star and full-mesh connections are supported, but rarely used Initially a full-mesh solution, which can, however, be easily used for arrangement of any topology, including asymmetric one
For arrangement of full-mesh topologies for N nodes, setup of N-1 connections (Permanent Virtual Circuits — PVC) for each site is required For arrangement of full-mesh topologies using H-VPLS technology for N nodes, setup of just one connection on each site is required
Frame Relay has a quite powerful QoS implementation, but it includes no possibility of package hierarchical classification and queuing Similarly to IP, QoS in MPLS networks can be implemented on the basis of Integrated Services (RSVP extension) and Differentiated Services (DSCP, MPLS experimental bits). Some manufacturers have also implemented on their devices the so called Hierarchical QoS, which provides more possibilities for QoS flexible setup
Frame Relay has limitation on data transfer rate of 34 Mbps In Metro Ethernet MPLS networks, data transfer rate is limited by the speed of Ethernet port. Currently, there are already Ethernet ports operating at speed of 40 Gbps
Requires from a customer administration and support of WAN equipment WAN equipment is not required; knowledge of LAN technologies is enough to maintain network operability
Investments in WAN equipment (routers) is required, which in case of connection of a great number of sites significantly increases the cost of project The customer gets an Ethernet port, which makes it possible to reduce costs for CPE (Customer Premises Equipment), since the customer normally already has switches for arrangement of a local office network.

FRAME RELAY	MPLS METRO ETHERNET
Most adjusted for provision of services of point-to-point type. Star and full-mesh connections are supported, but rarely used	Initially a full-mesh solution, which can, however, be easily used for arrangement of any topology, including asymmetric one
For arrangement of full-mesh topologies for N nodes, setup of N-1 connections (Permanent Virtual Circuits — PVC) for each site is required	For arrangement of full-mesh topologies using H-VPLS technology for N nodes, setup of just one connection on each site is required
Frame Relay has a quite powerful QoS implementation, but it includes no possibility of package hierarchical classification and queuing	Similarly to IP, QoS in MPLS networks can be implemented on the basis of Integrated Services (RSVP extension) and Differentiated Services (DSCP, MPLS experimental bits). Some manufacturers have also implemented on their devices the so called Hierarchical QoS, which provides more possibilities for QoS flexible setup
Frame Relay has limitation on data transfer rate of 34 Mbps	In Metro Ethernet MPLS networks, data transfer rate is limited by the speed of Ethernet port. Currently, there are already Ethernet ports operating at speed of 40 Gbps
Requires from a customer administration and support of WAN equipment	WAN equipment is not required; knowledge of LAN technologies is enough to maintain network operability
Investments in WAN equipment (routers) is required, which in case of connection of a great number of sites significantly increases the cost of project	The customer gets an Ethernet port, which makes it possible to reduce costs for CPE (Customer Premises Equipment), since the customer normally already has switches for arrangement of a local office network.

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