SD-WAN Aids MPLS for End-to-End Visibility Gains

SD-WAN Aids MPLS for End-to-End Visibility Gains

Enterprise Networking Mag | Tuesday, July 16, 2019

Enterprises are seeking cost-efficiencies as they transform their wide area networks to SD-WAN. The new shift to SD-WAN has given rise to a shift of focus to MPLS routing regarding end results.

FREMONT, CA: Software-enabled networking concepts, offered by 4G LTE and the internet, have created a new wide area network (WAN) architecture that is building further attention on multiprotocol label switching (MPLS) routing. The result―SD-WAN―linked with the bandwidth and cost benefits has made it possible to decrease network operating costs, as well as reduce the time and effort to bring up a new branch or update an existing network.

A large number of dealers now provide SD-WAN products that receive the advantage of 4G LTE and low-cost internet access to make network connection more cost-effective to their remote offices. While characteristics change, all network hubs include a central controller and network edge elements. Several vendors employ the controller as a hardware appliance, while others do so as data-center-resident or cloud-based software. Each division hosts one or more edge elements that may be employed as virtual machine software or as an appliance.

Enterprise Traffic through the Internet:

The advent of SD-WAN has generated a rethinking of how organizations deploy MPLS routing as a mode of WAN technology. MPLS provides reliable performance but is expensive and time-consuming to install, thus, setting up a new link can take months.

In spite of the lack of guarantees, SD-WAN customers have discovered that combining multiple internet or LTE connections next to an MPLS link can attain higher output and yield at a much lower cost. Customers understand that internet performances can vary, and they install two or more internet connections, each linked to a different service provider. But users have also discovered that during a period when one connection has slowed down, another usually exhibits better performance.

Cloud Services and Network Virtual Services:

To address the problem of connection fluctuations and provide efficient access, some SD-WAN providers have installed and implemented cloud gateways that integrate a vendor-compatible edge function. Vendors have also delayed virtual network functions, such as deep packet inspection or firewalls, in the cloud that can be inserted into customer data paths to eliminate the need to install the software in each branch office.

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