Thanks for the reply. As we know 4200G already EOL, so im thinking to look at the replacement model for 4200G. I'm looking at HP 5210 24G EI , but the problem is different compatibility in the SFP transceivers.
Has anyone tried before using HP X124 1G SFP LC SX Transceiver (JD493A) in new HP 5210 24G EI switch instead of HP X120 1G SFP LC SX Transceiver (JD118B)?
Thanks