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Difference between EIGRP and OSPF

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  • Last Updated : 22 Aug, 2022
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EIGRP stands for Enhanced Interior Gateway Routing Protocol. It is used to share the information from one router to the neighbour routers if they exist in the same region. It is also a complex protocol but can be configured and make it work easily in small and large networks. It is also a hybrid protocol because it uses the features of the both distance vector routing and link-state routing protocol.

OSPF stands for Open Shortest Path first. This can be used and deployed in a variety of networks. This is a classless routing protocol which also assists variable-length subnet masking (VLSM) and discontiguous networks. 

Difference between EIGRP and OSPF:

S.

No.

ComparisonEIGRPOSPF
1.Stands forEnhanced Interior Gateway Protocol.Open Shortest Path First.
2.Protocol typeHybrid.Link State.
3.Administrative distance90 (Internal) 170 (External).110
4.AlgorithmDUAL distance vector.Dijkstra link state.
5.Standards-based onCisco Proprietary.IETF Open Standard.
6.Routing metricsCombination of bandwidth, reliability, load and delay.Interface bandwidth.
7.CPU requirementsLower CPU and memory needs.Require high CPU and memory.
8.Ease of implementationEasy but no provision of auto-summary.Complicated.
9.Organized asIt lacks a hierarchical structure. It is hierarchically organized.
10.Used byIt is primarily utilized by medium-sized to large-sized networks.It primarily serves larger organizations in networks.
11.Denoted byThe symbol “D” is used to denote EIGRP in routing table. The symbol “O” is used to denote OSPF in routing table. 
12.Algorithm usedThe DUAL (Diffusing Update Algorithm) algorithm is used by EIGRP.The DIJKSTRA algorithm is used by OSPF.
13.Administrative boundaryAutonomous System (AS) no. is used to create a separate administrative boundary in a network.Area no. is used to create a separate administrative boundary in a network. The route information is exchanged by the routers from the neighbor routers in the network that exists within the same area.
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