You can change multiple interface bandwidths at once. In your web console, go to the manage nodes page. There is a drop-down menu at the top that will allow you to change nodes to interfaces. After you select interfaces, you can change the grouping to allow you to see only the ones for Cisco. Check the boxes of the interfaces that you want to change, and choose "Edit Properties". Check the Bandwidth box then check the custom bandwidth box, and it will allow you to change the transmit and receive bandwiths. Hope this helped.