errs = AppendValidation(errs, fmt.Errorf("service entry port may not be null"))
				continue
			}
			if servicePorts.InsertContains(port.Name) {
				errs = AppendValidation(errs, fmt.Errorf("service entry port name %q already defined", port.Name))
			}
			if servicePortNumbers.InsertContains(port.Number) {
				errs = AppendValidation(errs, fmt.Errorf("service entry port %d already defined", port.Number))
			}