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Dell PowerEdge FN I/O Module Configuration Guide 9.10(0.0)

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Router Priority and Cost

Router priority and cost is the method the system uses to “rate” the routers.

For example, if not assigned, the system selects the router with the highest priority as the DR. The second highest priority is the BDR.
  • Priority is a numbered rating 0 to 255. The higher the number, the higher the priority.
  • Cost is a numbered rating 1 to 65535. The higher the number, the greater the cost. The cost assigned reflects the cost should the router fail. When a router fails and the cost is assessed, a new priority number results.
Figure 1. Priority and Cost Examples Illustration of priority and cost examples.

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