Stacking V400 Alternative Configuration Required for Certain Fiber Cables

V400 is the default mode that sets the stack ports to 106G. V400 alternative configuration is required when using specific fiber cables. This mode sets the stack ports to 100G, enables pre-emphasis, and FEC (clause_91).

Cables requiring Alternative Configuration include:

QSFP28 SR4
QSFP28 LR4
QSFP28 CWDM4
QSFP28 PSM4
QxQ AOC cable - 5m
QxQ AOC cable - 7m
QxQ AOC cable - 10m
QxQ AOC cable - 20m

For a complete list of supported cables, see ExtremeSwitching and Summit Switches: Hardware Installation Guide for Switches Using ExtremeXOS 21.1 or Later .

Supported Platforms

ExtremeSwitching X590, X690, X870 series switches.

Changed CLI Commands

Changes are underlined.

configure stacking-support stack-port [stack-ports | all] selection [native {V80 | V160} | V320 |V400 {alternative-configuration} | help} | alternate]