errs = appendErrors(errs, validateGatewayNames(match.Gateways, false))
			if match.SourceNamespace != "" {
				if !labels.IsDNS1123Label(match.SourceNamespace) {
					errs = appendErrors(errs, fmt.Errorf("sourceNamespace match %s is invalid", match.SourceNamespace))
				}
			}
		}
	}

	return
}