42U Rack Cabinet Type 7D6DRack cabinet setupInstall rack extension kitInstall rack extension kitSee this topic to learn how to install extension kit.Install 42U Advanced Rack Extension KitSee this topic to learn how to install 42U Advanced Rack Extension Kit.Install 42U Advanced Rack Extension Kit with RDHXSee this topic to learn how to install 42U Advanced Rack Extension Kit and RDHX.Install 42U Standard Rack Extension KitSee this topic to learn how to install 42U Standard Rack Extension Kit.Install 42U Standard Rack Extension Kit with RDHXSee this topic to learn how to install 42U Standard Rack Extension Kit and RDHX.Give documentation feedback