I have five C9300-48P switches connected in stack and in service.I want to upgrade the IOS from version 16.6.5 to the recommended version, which is 17.9.5I have always done it with "offline" switches, but never with switches in service.Can I upgrade ...

Reading the SFP + DWDM datasheet, it is not clear to me what is the reach of non-tunables SFP+ as DWDM-SFP10G-61.41= I understand that the ditance is limited by the loss of optical fiber and chromatic dispersion but, what could be the distance in the...