deepak pant

• Jul 6th, 2007

 

I will give you the difference between then you can understand why it is
better

OSPF (Open Shortest Path First) it's link state protocol which sending hello
packet to it's neighbours
give best path 6 backup path
it a supports the subnating (classless)
administrative distance 110
using wildcard 0.0.0.0
autonomous 1-65535
using area

Hybrid protocol
eigrp enhance interior gateway protocol
90 administrative distance
supporting subnating
using area
autonomous 1-65535
using area

Key capabilities that distinguish Enhanced IGRP (EIGRP) from other routing
protocols include fast convergence, support for variable-length subnet mask,
support for partial updates, and support for multiple network layer protocols.

Router running EIGRP stores all its neighbors' routing tables so that it can
quickly adapt to alternate routes. If no appropriate route exists, EIGRP queries
its neighbors to discover an alternate route. These queries propagate until an
alternate route is found.

The support of EIGRP for variable-length subnet masks permits routes to be
automatically summarized on a network number boundary. In addition, EIGRP can be
configured to summarize on any bit boundary at any interface.

In most cases, EIGRP only uses Delay and Bandwidth with Bandwidth taking
precedence. The metric for EIGRP is calculated by multiplying the IGRP metric by
256. So the formula used to calculate the metric is:

EIGRP Metric = 256*((K1*Bw) + (K2*Bw)/(256-Load) +
(K3*Delay)*(K5/(Reliability + K4)))

Rahul

• Apr 9th, 2013

 

Provide Backup ,Fast and safe Convergence,reliable,but Cisco proprietary

Pranjal

• Apr 13th, 2013

 

Having to take areas into account does make it more complex. EIGRP requires no such consideration, either from design or configuration.


With that said, large scale EIGRP implementations can often be more complex than similar scale OSPF implementations because areas inherently scale the deployment by pruning the database depending on area configuration. EIGRP requires that to be done manually by using stub routers or summary addresses. This can break the topology because it will actually filter routes from the topology table - OSPF will always see the topology, it filters on the export to the RIB.


We could go on for a while about details and discuss semantics, but the bottom line is, Cisco thinks EIGRP is simpler to configure, regardless of single area/multi-area OSPF. Even if it were not, the convergence alone makes EIGRP a clear winner in campus designs.


EIGRP should *NEVER* be used over the WAN in my opinion. Ever

amol madhav rohokale

• Apr 20th, 2013

 

YES

Rahul

• May 11th, 2013

 

Eigrp creating secondary path or route for backup,convergent is fast.

rahul

• Feb 7th, 2014

 

EIGRP, support unequal cost load balancing,it keep a backup path,this feature is not AVAILABLE IN OSPf

ajithprasadpv

• Jul 26th, 2015

 

Eigrp has the fastest convergence among all the IGP protocols. Its now an open standard. Supports unequal cost load balancing (with the help of Variance concept). It has a pre-calculated back-up path. It possess Split horizon as the loop prevention mechanism.

rahul

• Dec 27th, 2015

 

Eigrp perform the load balancing on unequal cost value, Eigrp has a back up route, Primary route and the secondary route so the convergen is fast.

Rahul

• Jan 4th, 2018

 

Eigrp has a backup path/Route,If one path is down it switch to secondary path.
Eigrp has a loadbalancing of unequal path also