IP network configuration for intradomain traffic engineering
Feldmann, A.; Rexford, J.
Network, IEEE
Volume 15, Issue 5, Sep/Oct 2001 Page(s):46 - 57
Digital Object Identifier 10.1109/65.953233
Summary:The smooth operation of the Internet depends on the careful
configuration of routers in thousands of autonomous systems throughout
the world. Configuring routers is extremely complicated because of the
diversity of network equipment, the large number of configuration
options, and the interaction of configuration parameters across multiple
routers. Network operators have limited tools to aid in configuring
large backbone networks. Manual configuration of individual routers can
introduce errors and inconsistencies with unforeseen consequences for
the operational network. In this article we describe how to identify
configuration mistakes by parsing and analyzing configuration data
extracted from the various routers. We first present an overview of IP
networking from the viewpoint of an Internet service provider and
describe the kinds of errors that can appear within and across router
configuration files. To narrow the scope of the problem, we then focus
our attention on the configuration commands that relate to traffic
engineering-tuning the intradomain routing protocol to control the flow
of traffic through the ISP network. We present a case study of a
prototype tool, developed in collaboration with AT&T IP Services,
for checking the configuration of the AT&T IP Backbone and providing
input to other systems visualization and traffic engineering
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