Hi Peter, You are right. I am using SFP like: QSFP40G-4SFP10G With this SFP I have the option to configure different speeds and speed auto. switch(config-if)# speed ? 10 10Mb/s 100 100Mb/s 1000 1Gb/s 10000 10Gb/s 40000 40Gb/s auto Auto negotiate speed Depending on type of SFP, we can or we cannot configure "speed auto".
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