RJ-45 Console and I²C interfaces are integrated in the same connector. Due to that, connecting any cable other than the Mellanox supplied console cable may cause an I²C hang.
Using uncertified cables may damage the I²C interface. Refer to the Replacement Parts Ordering Numbers appendix for harness details.
RJ-45 CONSOLE and I²C Pinout
| Signal | Pin# | Color |
|---|---|---|
| Not connected | 1 | G/W |
| I²C_SCL | 2 | G |
| TXD | 3 | O/W |
| Not connected | 4 | Bl |
| GND | 5 | Bl/W |
| RXD | 6 | O |
| I²C_SDA | 7 | Br/W |
| Not connected | 8 | Br |
RS232 harness cable (DB9 to RJ45) is supplied to connect a host PC to the switch’s RJ-45 Console port.
RJ45 to DB9 Harness Pinout
