eigorp...

EIGRP

live it, love it...

eigrp is a cisco proprietary hybrid routing protocol. it uses an autonomous sytem to
describe the set of contiguous routers that use the same protocol and routing information.

it includes the subnet mask in its updates (vlsm capable)
eigrp has both distance vector and link state qualities. it sends distance vector network
information and the costs associated with reaching those networks from the vantage point of the
advertising router.

its link state characteristics include sync'ing routing tables between neighbors at startup and
sending updates when the topology changes

eigrp uses rtp (reliable transport protocol)
has efficient neighbor discovery
uses dual (diffusing update algorithm) for best path selection
supports vlsm

it also uses protocol dependant modules which is a way of saying it can support multiple
protocols such as appletalk and ipx, much like is-is can support ip and clns... but who in their
right mind uses appletalk and ipx anymore...

grrrrrrrrrrrrp...