Routing Protocol Basics

Routing protocol based
management from
administrative distance (AD) is a measure of the road by the neighboring routers receiving selection information reliability.
The default administrative distance
route AD default source
connected to the interface 0
Static route 1
EIGRP 90
IGRP 100
the OSPF 110
the RIP 120
Externat EIGRP 170.
Unknown 255 (This route will never be used)
routing protocol
1. Distance vector
2. Link status
3. Hybrid
distance vector routing protocol
of a network may be multiple links to reach a unified remote network. If this happens, management first example will be checked. If AD is the same, the use of other protocols will be determined metric value the best path to a remote network.
Routing loops
distance-vector routing protocol updates all active interfaces periodically broadcast routing through the Internet to track any changes in the network.
Routing loops may occur because each router can not be updated simultaneously or nearly simultaneously complete routing table.
The maximum hop count
due to problems loop can be simply described as infinite count, which is due to announce the Internet communication and dissemination of rumors and false information caused.