what is the major difference between EIGRP & IGRP?

Answer Posted / 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.

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