COST = 100 / bandwidth in Mbps (or bps per conversion)
| Interface type | Interface Bandwidth in bits per sec | OSPF Cost |
| Serial | 56000.00 | 1785 |
| ISDN | 64000.00 | 1562 |
| T1 | 1544000.00 | 64 |
| E1 | 2648000.00 | 48 |
| Ethernet | 10000000.00 | 10 |
| Fast Ethernet | 100000000.00 | 1 |
| Gigabit Ethernet | 1000000000.00 | 1 |
| OC48 | 2500000000.00 | 1 |
