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MLPPP OSPF COST

All,

If running OSPF over MLPPP, will the cost increase if one link in the bundle fails?

Thanks,

4 REPLIES
Hall of Fame Super Bronze

Re: MLPPP OSPF COST

The cost is derived from the interface bandwidth value. When one link fails the bandwidth value changes accordingly hence the cost.

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Edison.

New Member

Re: MLPPP OSPF COST

Will EIGRP do the same?

Hall of Fame Super Bronze

Re: MLPPP OSPF COST

Yes, its composite metric uses bandwidth value from the interface as part of the calculation.

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Edison.

Super Bronze

Re: MLPPP OSPF COST

Note:

What Edison is suggesting, assumes the interface isn't explictly OPSF costed (which is most often the case).

Also note, if you work with Brand X, it might not support OSPF costing automatically derived from interface's bandwidth (and if it does, if may also use a different base cost then Cisco's default 100 Mbps = 1).

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