下一代虛擬私有網路核心技術之研究(1/2)─子計畫一:下一代虛擬私有網路彈性資源管理與傳輸服務品質保證方法之研究
Other Title
Flexible Resource Management and QoS Assurance for Next Generation Virtual
Private Networks(VPNs)
Private Networks(VPNs)
Date Issued
2002
Date
2002
Author(s)
DOI
902213E002079
Abstract
Driven by fear of hackers and the economics of the
Internet, the subject of Virtual Private Network (VPN)
over the Internet (i.e. IP-based VPN) has received
considerable attention from the industry and recently
ever-growing interest from the research community. The
service support and provisioning of VPN are going into
an age of dramatic growth. In the meantime, the transfer
requirements of VPN will as well have drastic changes.
The first generation VPN was built mainly using private
leased line service. The second generation VPN is to
create encrypted data tunnels through the Internet. The
technology focuses Layer 2 tunneling techniques such as
PPTP, L2P and L2TP, and remote access security such as
RADIUS and IPsec-based encryption.
While the current VPN technology reaches a state
of readiness, we expect the number of endpoints per
VPN will grow rapidly. In today’s dynamic business
environments, demand for dependable, dynamic
communication between endpoints increases and the
communication patterns become difficult to forecast. In
many cases, users are unable to clearly specify loads
between endpoints of VPN sets. Let alone the QoS
requirements on a point-to-point basis. Moreover, in
traditional private networks users have to pay for the full
bandwidth at all times even the line is not being used.
The new issue in IP-based VPN implementation is that
the network managers need to play a more active role in
allocating and managing bandwidth allocated to
individual VPNs in accordance with the traffic load and
the service level agreement. In this new model, users will
no longer need to pay for the bandwidth they do not use.
Network providers can better plan network resources and
utilize bandwidth.
This project focuses on the design and
implementation of VPN resource management
mechanisms to support effective and flexible VPN
configuration and billing at the boundary router.
Specifically, we address the problems of a) how to manage and allocate bandwidth in order to support
effective and flexible VPN configuration and billing at
the boundary router; b) how to assure service quality and
performance between individual VPN tunnels; and c)
how to guarantee performance to different classes of
applications within a tunnel for all time scales.
Subjects
Virtual Private Network
VPN
Quality of
Service
Service
resource management
packet scheduling
capacity planning and management
Integrated Services
Differentiated Services
Broadband Internet
Publisher
臺北市：國立臺灣大學資訊管理學系暨研究所
Type
other
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