Published By: Riverbed
Published Date: Feb 26, 2015
How can IT achieve the flexibility and agility it needs to offer multiple types of applications in multiple locations? Just as enterprises take advantage of applications hosted in multiple locations (i.e., public clouds, private clouds, or SaaS applications), they take advantage of different networks for different reasons (i.e. performance, backup, remote access). These could be MPLS links, ATM links, traditional Internet connections, or VPN lines. Enterprises, in effect, are already building hybrid networks, and those combined with the elements of hybrid clouds create the hybrid enterprise.
Interconnecting three or more sites across a metro or wide area network has traditionally been accomplished via a hub and spoke network topology using Private Lines, Frame Relay or IP VPNs over the Internet. Ethernet services support hub and spoke topologies but also support an “any-to-any” network topology similar to a LAN but delivered over a wide area. This latter capability is unique to Ethernet services and cannot be cost effectively delivered using legacy point-to-point technologies such as Frame Relay or IP VPNs.
This paper discusses two options for multi-site connectivity using Ethernet services. One option discusses the classical hub and spoke topology using Ethernet Virtual Private Lines (EVPL). The other option discusses the “any-to-any” topology using an Ethernet Private LAN (EP-LAN) service. Through examples, the paper illustrates the capabilities of the two approaches and their benefits.