Link State and its routing metric

Answered Question
Mar 5th, 2007

I am sure that link-state uses cost (108 / bandwidth) as its routing metric.

I have been in a discussion that link-state uses delay and load , reliability in its routing metric as well (i disagreed).

I could not find solid authenticated document for proof through my search. Yes I found document to proof that link-state uses cost.

Any comment ?

I have this problem too.
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Correct Answer by Jon Marshall about 9 years 7 months ago

Hi

if you are talking about OSPF then yes it uses cost as it metric with the bandwidth as the variable factor.

Delay and load are two of the metrics used by IGRP/EIGRP.

HTH

Jon

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Correct Answer
Jon Marshall Mon, 03/05/2007 - 00:29

Hi

if you are talking about OSPF then yes it uses cost as it metric with the bandwidth as the variable factor.

Delay and load are two of the metrics used by IGRP/EIGRP.

HTH

Jon

zillah2004 Mon, 03/05/2007 - 00:31

>>if you are talking about OSPF<<

Yes.

What about other ? could you please explain ?

Jon Marshall Mon, 03/05/2007 - 00:42

Hi

IGRP/EIGRP uses 4 characteristics to determine the metric of a route

1) bandwidth

2) delay

3) load

4) reliability

By default the 2 that are used in the route metric calcultaion are bandwidth and delay.

HTH

Jon

zillah2004 Mon, 03/05/2007 - 00:47

Thanks Jon for that , Yes i am aware of that.

I thought mistakenly, that you was talking about other link-state protocols, therefore i asked like what ?

Sorry for confusion

Jon Marshall Mon, 03/05/2007 - 00:54

Oops, my mistake. No i was just referring to OSPF when talking about link state.

Jon

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