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Link State Routing Protocols
This type of routing protocol requires each router to maintain
at least a partial map of the network. When a network link
changes state (up to down, or vice versa), a notification,
called a
link state advertisement (
LSA) is
flooded throughout the network. All the routers
note the change, and recompute their routes accordingly.
This method is more reliable, easier to debug and less
bandwidth-intensive than
Distance-Vector.
It is also more complex and more compute- and memory-intensive.
OSPF and
OSI's
IS-
IS are link state routing protocols.
