Which QoS features do the Catalyst 2900 XL and 3500 XL series switches support?
A. The Catalyst 2900 XL and 3500 XL switches with 8 MB of DRAM provide QoS based on IEEE 802.1p Class of Service (CoS) values. They support input classification and output scheduling. The Catalyst 3524-PWR XL and 3548 XL switches also support the port-based input re-classification feature. The original Catalyst 2900 XL with 4 MB DRAM and WS-X2914-XL and WS-X2922-XL modules do not support any QoS features. GigaStack daisy-chained configurations cannot provide guaranteed voice QoS because they are shared media access models.
