How do I modify the metric/cost calculations in OSPF?
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Modified on: Tue, 31 Jul, 2018 at 11:24 AM
In NetSim v10.0 (or above),
OSPF cost calculations are done in SendLSU.c file which is part of the Routing Project.
In function fn_NetSim_OSPF_LSUpacketformation() the lines:
dBandwidth=NETWORK->ppstruNetSimLinks[nLink_Id-1]->puniMedProp.pstruWiredLink.dDataRateUp;nCost=(int)round(REFERENCE_BANDWIDTH/dBandwidth);
are related to the cost calculations.
The cost variable ncost is further used in the same functions in the lines:
pstruNewEntry = calloc(1,sizeof(struct stru_RouterLSA_Entry));pstruNewEntry->nMetric = pstruRoutingTable->nCost+nCost;
You can modify these lines suitably to calculate Metric in a different way.
Regarding the calculation of cost, you can refer to Experiment 12 of NetSim Experiment Manual.
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