Why eigrp is faster than ospf

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It depends which one is more suitable for a particular network design. If you encounter a technical issue on the site, please open a support case.

Communities: Chinese Japanese Korean. All Rights Reserved. The Cisco Learning Network. Enterprise Certifications Community. View This Post. Edited by Admin February 16, at AM. Lower resource consumption compare to OSPF. Each time a link down, OSPF has to re-run dijkstra's algorithm. The router-id matter only and only when all the ospf processes are turned on at the same time.

Or atleast within Wait Interval of each other. Else the first one usually continues to be the DR irrespective of the router-id. If you encounter a technical issue on the site, please open a support case. Communities: Chinese Japanese Korean. All Rights Reserved. The Cisco Learning Network.

View This Post. Edited by Admin February 16, at AM. Thanks in advance.. Geo John. Hi to all If EIGRP has a feasible successor route in it's topology table and the active route in the route table fails then it is almost instantaneous in terms of failing over to the new route because EIGRP does not need to query any other routers or do any internal calculations, it simply installs the new route. In terms of time to select a new route, if there is a feasible successor then EIGRP is faster than OSPF, if there is not a feasible successor then it is hard to know which is faster and it may very well depend on the topology of the network.

Regards, Pritish. Hi Pritish, Is Perfect example and very intersting vision of how can influenced the convergance of routing protocol. Thank you very much Pritish. One more question: What are sub-second hellos for ospf? Thank you Sara. Good question! Here I found an interesting documentation which says: "It sub-second hello is especially useful in LAN segments, where neighbor loss might not be detected by the Open System Interconnection OSI physical layer and data-link layer.

If the interface can send and not receive then the line protocol of the interface may not go down think fiber connections I guess I'm not familiar with it at all.

I think it is clear to me now. I'm impressed by your knowledge. Are you a polymath?! For months of studies in Networking it's OK. But I'm an extremely, extremely persistent person Yes, google is a powerful tool, but sometimes you don't know what to ask from it. Thank you Dante, very useful information. Hello CLN, What are wait and retransmit timers here? I guess there is no wait timer in a normal point-to-point network as there is no DR and BDR elections Direct me if i'm wrong How about Retransmit timers?

Wait Timer A single shot timer that causes the interface to exit the Waiting state, and as a consequence select a Designated Router on the network. Waiting In this state, the router is trying to determine the identity of the Backup Designated Router for the network. Only those routers on the list that have not declared themselves to be Designated Router are eligible to become Backup Designated Router. If one or more of these routers have declared themselves Backup Designated Router i. In case of a tie, the one having the highest Router ID is chosen.

If no routers have declared themselves Backup Designated Router, choose the router having highest Router Priority, again excluding those routers who have declared themselves Designated Router , and again use the Router ID to break ties. If one or more of the routers have declared themselves Designated Router i. If no routers have declared themselves Designated Router, assign the Designated Router to be the same as the newly elected Backup Designated Router.

Cheers G. Log In to Answer. Related Questions Nothing found. More locations. More flexibility. Follow Us. Certifications Help About Us. OSPF, however, involves a small time to install a new route and re-route traffic once a failure occurs.

OSPF is a better choice when your network is hosted in a data center or cloud-based solution. As OSFP is widely running in most data center networks, it could do some fine-tuning in the network infrastructure underlying and exchange routing information with the firewall.

Conversely, OSPF is an open standard and simple protocol through which the network can be scaled easily. EIGRP is the only protocol supporting unequal path load balancing which helps routers route traffic across links of different bandwidth, while OSPF does not have this feature. Both of them could be widely deployed in Internet Protocol IP networks for data communication.