Abstract:
Nowadays, many companies have branch
offices and connect those offices to the main office over
the Internet using a site-to-site Virtual Private Network
connection. Most of these connections have always
operated at Layer 3 of the OSI network model. In recent
years, there has been a growing requirement to extend
links at Layer 2, which allows broadcast traffic to be
forwarded between sites. Depending on inter-site
connection medium, different technologies are utilized.
This paper compares and analyses site-to-site Layer 2
VPN technologies, which include layer 2 tunneling
protocol (L2TP), and point to point tunneling protocol
(PPTP), OpenVPN, Ethernet over IP (EoIP), and
MPLS/VPLS to choose the right VPN for the
organization. This is done by means of performance
measurement and packet analysis. In order to provide
fair comparable results, all technologies are tested in
the same manner.
