IGRP and EIGRP use the same metric calculation, but EIGRP's metric value is multiplied by 256 to give it more granularity in its decision making.
EIGRP (Enhanced IGRP) has replaced IGRP. With the way EIGRP is set up as a protocol it is possible to implement a newer router that only supports EIGRP into a network that is running IGRP. Honestly network admins should be pushing for EIGRP if they are still on IGRP as for many features and advantages EIGRP has over IGRP. Directly from Cisco.com: "Enhanced IGRP provides compatibility and seamless interoperation with IGRP routers. An automatic-redistribution mechanism allows IGRP routes to be imported into Enhanced IGRP, and vice versa, so it is possible to add Enhanced IGRP gradually into an existing IGRP network." EIGRP:Enhanced Interior Gateway Routing Protocol IGRP: Interior Gateway Routing Protocol *IGRP and EIGRP are both Cisco proprietary routing protocols.
IGRP - Interior Gateway Routing Protocol EIGRP- Enhanced Interior Gateway Routing Protocol
Distance Vector Protocol is a simple routing protocol.It uses distance or hop count as the primary metric when determining the best forwarding path.RIP, IGRP and EIGRP are examplesIt dates back to the ARPAnet network in the early 1970
We use igrp in a autonomous system and we use eigrp between two autonomous systems.
RIP - Only for small networks or those with underpowered hardware that either don't support or don't have the resources for a better routing protocol. IGRP - Basically outdated and supplanted by EIGRP. Again, useful if you can not use EIGRP due to router limitations. EIGRP - Useful in Cisco-only networks of basically any size. EIGRP is an extremely robust and efficient protocol that suits nearly any need other than inter-organization routing. OSPF - Useful everywhere. It's standardized, so it's not limited to a particular vendor. Most appropriate in large multi-vendor networks. It has a higher CPU load than EIGRP does, and it requires more granular control from an administration perspective.
IGRP is Interior Gateway Routing Protocol, enhanced by Cisco proprietary Enhanced IGRP.
Code for IGRP: I CCENT Ankur
Routing Information Protocol (RIP) and Interior Gateway Routing Protocol (IGRP) are two very popular Distance Vector routing protocols
OSPF is a classless link-state routing protocol. RIP version 1 and IGRP are both classful distance vector routing protocols, EIGRP is a hybrid protocol that supports classless addressing.
- debug ip igrp events
debug ip igrp events
The path bandwidth. A cumulative interface delay. The reliability between source and destination The load on a link in bits per second. The MTU value of a path.