Why is EIGRP fastest converging? Especially compared with OSPF.
johnifanx98
Member Posts: 329
in CCNA & CCENT
OSPF is also triggering update. So, what could be factor that makes OSPF particularly slower than EIGRP when converging?
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networker050184
Mod Posts: 11,962 Mod
Feasible successors can be used immediately in EIGRP unlike OSPF which calculates and floods when there is an issue. EIGRP does not have to ensure everyone has the same picture of the network (LSDB within an area) unlike OSPF which allows it have this shortcut built right in.An expert is a man who has made all the mistakes which can be made. -
johnifanx98
Member Posts: 329
Good point. But in EIGRP is it possible a broken link causes certain FS recalculated, and thus chained reactions hammering the whole network?
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networker050184
Mod Posts: 11,962 Mod
Sure, if you lose a succesor and FS you have to query for the route. There is a well known sate where things can get fudged up called Stuck In Active or just SIA. Read up on it if interested.An expert is a man who has made all the mistakes which can be made.
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iyare
Member Posts: 46 ■■■□□□□□□□
Because it is Cisco proprietary and must converge faster because it will be on a Cisco router.CCENT, CCNA(EXPIRED), BS Electrical Engineering (Communications/Optics/Nanotechnology) -
thedrama
Member Posts: 291 ■□□□□□□□□□
johnifanx98 wrote: »OSPF is also triggering update. So, what could be factor that makes OSPF particularly slower than EIGRP when converging?
if i do not remember wrong, DR/BDR router sends out(advertises) routing information(LSA) to all others resulting slower convergence compared to EIGRP.Monster PC specs(Packard Bell VR46) : Intel Celeron Dual-Core 1.2 GHz CPU , 4096 MB DDR3 RAM, Intel Media Graphics (R) 4 Family with IntelGMA 4500 M HD graphics.
5 year-old laptop PC specs(Toshiba Satellite A210) : AMD Athlon 64 x2 1.9 GHz CPU, ATI Radeon X1200 128 MB Video Memory graphics card, 3072 MB 667 Mhz DDR2 RAM. (1 stick 2 gigabytes and 1 stick 1 gigabytes) -
networker050184
Mod Posts: 11,962 Mod
No that is not the case thedrama,An expert is a man who has made all the mistakes which can be made.
