Answer / nandlal chauhan

igrp ad value is 100
eigrp ad value is 90(internal)or 170(external)

igrp is a dvrp ( distance vector routing protocols)
eigrp is a hybrid ( based on link speed or distance)

Answer / vikram pratap singh

IGRP and EIGRP are compatible with each other.
EIGRP offers multiprotocol support, but IGRP does not.
EIGRP and IGRP use different metric calculations.
EIGRP scales the metric of IGRP by a factor of 256.
IGRP has a maximum hop count of 255.
EIGRP has a maximum hop count limit of 224.

Enabling dissimilar routing protocols such as OSPF and RIP
to share information requires advanced configuration.
Redistribution, the sharing of routes, is automatic between
IGRP and EIGRP as long as both processes use the same
autonomous system (AS) number.

Answer / surulimanikandan

EIGRP offers multiprotocol support, but IGRP does not.
EIGRP support VLSM, but IGRP does not.
EIGRP it is Classless, IGRP is Classful routing protocol.

Answer / ravinder kumar tobadia

IGRP
-Distance Vector routing protocol
-Periodic Broadcast
-Send Broadcast in every 90 Sec.
-Maximum 255 hop (Default 100)
-Metrics cost
-Aministrative Distance is 100
-Cisco properiety
-Classfull
-Do not support CIDR & VLSM
-Hold Down Time - 280 Sec.
-Flush Time - 630 Sec
-No multiprotocol support

EIGRP
-Hybrid (based on link speed or distance)
-Event Trigger(Multicast On Changes)
-Multicast Hello in every 10 sec.
-Maximum 224 hop (Default 100)
-Metrics cost
-Aministrative Distance is 90
-Cisco properiety
-Classless
-Support CIDR & VLSM
-Dead Time - 40 Sec
-Multiprotocol support

Answer / jitenderas

in the vikram answer i will add a single line and i suppose
this is most important0-;
eigrp support vlsm where as igrp didnot support vlsm

Answer / avidojevic

IGRP is distance vector protocol as RIP, EIGRP is link
stata protocol as OSPF.
IGRP is classful protocol (doesn't contain class mask
information in routing update), EIGRP is classless protocol
(contain class mask information in routing protocol, so
support subneting and VLSM).
EIGRP supports concept of interlan route with AD 90 and
external route with AD 170 to prevent loops IGRP doesn't.

Answer / nilesh gawde

eigrp & igrp is compatible with each other.
eigrp is a classless routing protocol while igrp is a
classfull routing protocol.
eigrp is supported vlsm & cidr while igrp does not
supported vlsm & cidr.
eigrp has a maximum hope count id 255 while igrp macimum
hope count is only 100.
eigrp & igrp both protocol use dual algorhythum.

Answer / a.jagadish

eigrp sopports vlsm but igrp dose not like this i have lots
of diffrence
but actuly idont know the actual core diffrence
if any one have any idia send me at allam.jagadish@gmail.com

Answer / s.m.feroz ahmed

Hi,
The main difference between EIGRP and IGRP is EIGRP is used
to connect External Internet Gateway ROuting Protocol and
IGRP is Internal Gateway Routing Protocol.

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