Can I override the incoming Class of Service (CoS) to a specific CoS value?
A. Yes, you can override the CoS value set by the PC attached to the Cisco IP phone and use the configured port priority instead. This feature is called port-based re-classification. The switchport priority extend cos <0-7> interface command is issued to achieve this. This feature is supported only on Catalyst 3524-PWR XL and 3548 XL switches. This command was introduced after Cisco IOS® Software Release12.0(5)XU. This feature is complementary to the port prioritization available on supported Catalyst 2900 XL and 3500 XL series switches for untagged packets.
Related Questions
- Do the Catalyst 2950 series switches honor the incoming class of service (CoS) values in IEEE 802.1p (dot1p) tags from IP phones?
- Is the Layer 2 (L2) Class of Service (CoS) value retained for packets routed through the WS-X4232-L3 module?
- Can I override the incoming Class of Service (CoS) to a specific CoS value?
