Connecting 10GB spf slot to 1GB spf slot

Crossposted using Lemmit.

Original post from /r/sysadmin by /u/Rony_Eco on 2023-07-07 06:22:20+00:00.

Will connecting a switch operating in fixed 10GB mode and SFP+ slot and SFP+ module, to: A server's network adapter operating in fixed 1GB mode with SFP+ slot and SFP+ module result in damage to the SFP transceiver modules and the switch/Network Adapter involved ?

Both connectors have spf+ modules, but operate in different fixed modes, as configured from the switch, server network adapter themselves.

According to my understanding the possible damage extent is from SFP module to SFP module and the switch and network adapter will not be damaged, however a clarification is needed.