IGRP

IGRP:INTERIOR GATEWAY ROUTING PROTOCOL

CISCO PROPRITARY
MORE SCALABLE THAN RIP
255 =HOP COUNT LIMIT
100=DEFAULT HOP COUNT

SOHISTICATED METRIC

COMPOSITE METRIC
1 BANDWIDTH
2 HOP
3 DELAY
4 RELIABLITY

LOAD BANCING =6 PATH NON-EQUAL

DISTANCE VECTOR (DIRECTION+DISTANCE)

IGRP TIMERS

UPDATE TIMER=90 SEC.
INVALID TIMER = 3X90=270 SEC.
HOLD-DOWN=3X90+10=280SEC.
FLUSH TIMER=90X7=630SEC.

CLASSFUL ROUTING ONLY
NOT SUPPORT VLSM


AS no. = 1-65535
AD=100