10G/1G auto negotiation and auto detection mode

You can manually configure the port speed. In manual mode, the inserted optic must match the configured speed. Otherwise, the link will not come up. You can configure 1G mode with or without auto negotiation. The following speed matrix shows different combinations of modes on the SLX 9540.

Table 1. Port speed matrix

Ports 1 to 48 on SLX 9540

speed auto (default)
Auto-detection:
  • If 1G SFP optic is detected: Port is configured as 1G with 1000Base-X AN enabled.
  • If 1G SFP copper is detected: Port is configured as SGMII with 1000Base-T AN enabled; 1G, 100Mbps Full-Duplex advertised.
  • If 10G SFP is detected: port is configured as 10G
speed 1000 Force to 1G mode, AN disabled
speed 1000-auto
Force to 1G mode, AN enabled
  • If 1G SFP optic is detected: Port is configured as 1G with 1000Base-X AN enabled.
  • If 1G SFP copper is detected: Port is configured as SGMII with 1000Base-T AN enabled; 1G, 100Mbps Full-Duplex advertised.
speed 10000 Force to 10G mode
Speed 100
  • If 1G SFP optic is detected: No configuration change; link stays down
  • If 1G SFP copper is detected: Port is configured as SGMII (AN enabled) but 1000Base-T AN disabled.
no speed Equivalent to speed auto