Enabling MPLS Access

By Guilherme Salvadori

With the increasing demand for direct MPLS link delivery, both large carriers and ISPs need competitive solutions for this type of service. With this solution in mind, Datacom has developed compact equipment that makes it possible to deliver MPLS in the last mile, with wirespeed performance and low cost.

Datacom switches are wirespeed, meaning all packet processing is performed on dedicated chip hardware, not taking up CPU processing for this purpose. This allows you to have the maximum capacity of the interfaces available on the equipment without oversubscription.

The newest product in the Datacom EDD family (which already had the DM2100, DM2300 and DM4370) is the DM4360. This product is a Metro Ethernet Network Demarcation Device (EDD) Switch, with four (04) 1Gb optical uplinks and four (04) 1GE (RJ45) electrical ports, full-range internal AC / DC source, and redundant external. The embedded software is DmOS, Datacom's modular operating system, which supports a number of L2 / L3 / MPLS features.

MPLS is a technology developed by the IETF and defined by RFC 3031, which combines the routing process with layer 2 switching. MPLS aims to provide better traffic management and engineering, scalability, better performance and administration, and reduction in complexity compared to layer 2 technologies.

Within the MPLS cloud there is no query to IP addresses, only LABELs direct the packet to be transmitted, because there is no intervention of other protocols, thus ensuring the transparency of links. Control of IP routes continues to be carried out by routing protocols such as OSPF.

The possibility of delivering MPLS direct on access is a major differential of this product, which allows to reduce operating costs, since in MPLS the provisioning of services is done only in PEs (Provider Edge), in the case of DM4360 the final destination of MPLS is the CE itself (Costumer Edge – EDD MPLS 1GE DM4360).

The DM4360 supports the most varied applications, we can highlight the main scenarios:

  • Providing data link to ISPs.
  • Providing corporate data link.
  • Data transport.

Below is the network topology that illustrates some of these applications:

Using the DM4360 as access equipment, various network control and diagnostics tools are available. Active link status monitoring can be performed with the CFM protocol, which is defined by the IEEE 802.12ag standard with full end-to-end / end-to-end path assurance, or in a network of multiple devices.

With the Sflow protocol, it is possible to monitor the data traveling on the network. A major advantage of sFlow is that it does not forward all collected traffic, instead it only forwards traffic samples to the collector at a configurable rate, reducing the computational load.

The DM4360 also supports the open and defined TWAMP protocol defined by RFC 5357 (alternative to IP SLA), which makes it possible to measure network performance parameters such as latency, jitter and packet loss.

It is used to verify compliance with the Service Level Agreement – SLA. This feature is very important in links that require high availability, such as banking, hospitals, road traffic, air, among others.

TWAMP operates between the interfaces of two devices that play specific roles: Sender and Reflector.

  • TWAMP Client

Control-Client: Configures, starts and stops TWAMP test sessions;

Session-Sender: Creates TWAMP test packages sent to the Session-Reflector on the TWAMP server.

  • TWAMP Server

Session-Refletor: Sends back a measurement packet when a test packet is received, but does not keep a record of such information;

The server manages one or more sessions with the TWAMP client and listens for control messages on a TCP port.

An interesting application is the use of multiple DM4360 installed on clients, operating as TWAMP Sender and a DM4270 Switch in the concentrator as TWAMP Reflector. With this solution it is possible to simultaneously monitor up to 512 TWAMP sessions, thus ensuring the customer contracted SLA:

Test running:

In addition to the DM4360, Datacom has a complete line of MPLS switches, interoperable with equipment from the largest manufacturers in the market, including the DM4370, DM4000, DM4100, DM4170, DM4270 and DM4775. In DmOS version 5.0 we will have MPLS functionality (under license) also on GPON DM4610 8GPON and DM4615 OLTs.


Datacom has a complete structure in its headquarters where face-to-face training is offered. Training will enable you to manipulate equipment, configure various topologies and application scenarios in a complete lab environment, and can count on the help of our professionals in a series of good practices that will greatly assist in operating your network.

For more information about these applications please contact the Support teams directly: suporte.prevendas@datacom.com.br and Comercial: sales@datacom.com.br. And by the phone (+55) 51 3933 3000.

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