Thursday, January 17, 2019

HALP! < 3M reach with 25G on Cisco Nexus 9200

We're moving some servers to a rack further down and the SFP-H25GB-CU3M cables we use are too short.

The switch is a 92160YC-X. EDIT: The switch is not in ACI mode, the ports are just Ethernet trunk ports.

I assumed we would be able to use either SFP-25G-SR modules with fibres, or SFP-25G-AOC10M AOC cables, but Ciscos datasheet says that: The switch has FC-FEC enabled for 25Gbps, and supports upto 3m in DAC connectivity.

The compatibility matrix at https://tmgmatrix.cisco.com/ claims that the switch ONLY supports copper DACs up to three meters, AOCs also considered.

Have anyone been able to use a 25GB port for longer than 3M stretches on a Nexus 9200 switch?



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