June 2004
Intermediate to advanced
840 pages
39h 47m
English
Content preview from The Internet and Its Protocols
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374 Chapter 8 Traffic Engineering
A more controlled approach favored by many network operators is
offline
traffic engineering.
In this mode of operation, all decisions about how to route
traffic are made by one (or a few) centralized servers. Such servers can keep a
coordinated view of the network and react to changes in traffic loads. They can
supply source routes to hosts, tunneling information to selected routers, or
constraint-based routing instructions to all routers in the network. These instruc-
tions from the traffic engineering server can be applied to new flows or to existing
flows,
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