Question : Problem: configure ip-address + hp designjet 750c plus

configure ip-address + hp designjet 750c plus

Answer : Problem: configure ip-address + hp designjet 750c plus

It appears you're trying to assign an ip address to a HP DesignJet 750c Plus.  If you're looking at the documentation for the 750c Plus, it does not explain how to assign an IP address.  This is because you need to look at the documentation for the specific JetDirect Print Server (Network Card) you have.  The JetDirect card should have come with its own documentation that explains how to assign a specific IP address.  If not, you can also go to HP's web site, choose Support and Drivers, and enter the JetDirect card model.  Or, if you provide the model of the card, I can find it through HP's web site.