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Why aren't OSPF costs re-calculated correctly?

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TitleWhy aren't OSPF costs re-calculated correctly?
Symptoms

OSPF costs not re-calculated correctly in LAG/VE configuration

 

 

 

Environment
  • MLX / MLXe / CES / CER
  • NetIron OS 5.x releases
  • OSPF configured on LAG/VE interface
  • OSPF auto-cost reference-bandwidth <num> configured 
Cause
auto-cost use-active-ports missing from OSPF configuration
 
Resolution

Configure auto-cost use-active-ports under OSPF:

router ospf
 auto-cost use-active-ports
 auto-cost reference-bandwidth <num>
Additional notes
The use-active-ports option enables OSPF cost calculation for currently active ports only.  This option does not have any effect on non-VE or non-LAG interfaces.  The default operation is for costs to be based
on configured ports.

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