Table 1—Auto negotiation Valid Configuration Table
Table 1—Auto negotiation Valid Configuration Table
|Configuration NIC |Configuration Switch |Resulting NIC |Resulting Catalyst |Comments |
|(Speed/Duplex) |(Speed/Duplex) |Speed/Duplex |Speed/Duplex | |
|AUTO |AUTO |1000 Mbps, Full-duplex |1000 Mbps, Full-duplex |Assuming maximum |
| | | | |capability of Catalyst |
| | | | |switch, and NIC is 1000 |
| | | | |Mbps, full-duplex. |
|1000 Mbps, Full-duplex |AUTO |1000 Mbps, Full-duplex |1000 Mbps, Full-duplex |Link is established, but|
| | | | |the switch does not see |
| | | | |any auto negotiation |
| | | | |information from NIC. |
| | | | |Since Catalyst switches |
| | | | |support only full-duplex|
| | | | |operation with 1000 |
| | | | |Mbps, they default to |
| | | | |full-duplex, and this |
| | | | |happens only when |
| | | | |operating at 1000 Mbps. |
|1000 Mbps, Full-duplex |1000 Mbps, Full-duplex |1000 Mbps, Full-duplex |1000 Mbps, Full-duplex |Correct Manual |
| | | | |Configuration |
|100 Mbps, Full-duplex |1000 Mbps, Full-duplex |No Link |No Link |Neither side establishes|
| | | | |link, due to speed |
| | | | |mismatch |
|100 Mbps, Full-duplex |AUTO |100 Mbps, Full-duplex |100 Mbps, Half-duplex |Duplex Mismatch 1 |
|AUTO |100 Mbps, Full-duplex |100 Mbps, Half-duplex |100 Mbps, Full-duplex |Duplex Mismatch 1 |
|100 Mbps, Full-duplex |100 Mbps, Full-duplex |100 Mbps, Full-duplex |100 Mbps, Full-duplex |Correct Manual |
| | | | |Configuration2 |
|100 Mbps, Half-duplex |AUTO |100 Mbps, Half-duplex |100 Mbps, Half-duplex |Link is established, but|
| | | | |switch does not see any |
| | | | |auto negotiation |
| | | | |information from NIC and|
| | | | |defaults to half-duplex |
| | | | |when operating at 10/100|
| | | | |Mbps. |
|10 Mbps, Half-duplex |AUTO |10 Mbps, Half-duplex |10 Mbps, Half-duplex |Link is established, but|
| | | | |switch does not see Fast|
| | | | |Link Pulse (FLP) and |
| | | | |defaults to 10 Mbps |
| | | | |half-duplex. |
|10 Mbps, Half-duplex |100 Mbps, Half-duplex |No Link |No Link |Neither side establishes|
| | | | |link, due to speed |
| | | | |mismatch. |
|AUTO |100 Mbps, Half-duplex |100 Mbps, Half-duplex |100 Mbps, Half-duplex |Link is established, but|
| | | | |NIC does not see any |
| | | | |auto negotiation |
| | | | |information and defaults|
| | | | |to 100 Mbps, |
| | | | |half-duplex. |
|AUTO |10 Mbps, Half-duplex |10 Mbps, Half-duplex |10 Mbps, Half-duplex |Link is established, but|
| | | | |NIC does not see FLP and|
| | | | |defaults to 10 Mbps, |
| | | | |half-duplex. |
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