Scalability implications of virtual private networks
De Clercq, J.
Paridaens, O.
This paper appears in: Communications Magazine, IEEE
Publication Date: May 2002
Volume: 40,
Issue: 5
On page(s): 151-157
ISSN: 0163-6804
References Cited: 4
CODEN: ICOMD9
INSPEC Accession Number: 7265333
Digital Object Identifier: 10.1109/35.1000229
Current Version Published: 2002-08-07
Abstract
This article gives an overview of the most promising technologies
for service providers to offer virtual private network services. The
focus is on the analysis of the scalability implications of these
virtual private network mechanisms on existing service provider backbone
networks. Very often, when deploying VPN services, service providers
will be confronted with a trade-off between scalability and security.
VPNs that require site-to-site interconnectivity without strong
(cryptographic) security can be deployed in a scalable way based on the
network-based VPN model, as long as the interaction between the customer
and provider routing dynamics are controlled. VPNs that require strong
(end-to-end) cryptographic security should be deployed according to the
CPE-based VPN model, using the available IPsec protocol suite
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