Ensuring a 25 GB RoCE connection to a CISCO switch works

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7.1 LPAR mode z/VM guest KVM guest

Using a RoCE adapter with a 25-Gigabit Ethernet connection to a Cisco switch requires a special setting.

For connections to a Cisco switch, you must set the switch to use FEC RS-IEEE for forward-error-correction (FEC) in Reed-Solomon mode.