Adiah,
EIGRP is currently referred to as an "advanced distance-vector protocol."
It is basically a distance-vector protocol, and NOT link-state, because
EIGRP routers have no visibility of the actual network topology beyond
their neighbors (that is, which routers are connected to each other over
what links); but it does have some advanced features that increase its
efficiency, such as incremental updates and hellos, that are usually
thought of as features of link-state protocols. The DUAL algorithm is a
unique feature of EIGRP that protects against route loops during topology
changes and limits the scope of route recalculation in a properly-designed
network.
The older ACRC course materials (the predecessor course to BSCN) used to
refer to EIGRP as an "advanced hybrid" routing protocol, meaning a
combination of distance-vector and link-state. The current terminology
more accurately reflects its actual behavior.
HTH,
Pamela
At 12:02 PM 7/2/01 -0400, you wrote:
>Hi Group members,
>
>Is EIGRP a Distance Vector or a Link State protocol. I thought it is a Link
>State until I read Cisco BSCN book, which classify it as both. Is that
>possible.
>
>Regards to all
>
>Adiah
Message Posted at:
http://www.groupstudy.com/form/read.php?f=7&i=10667&t=10657
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