https://wassimaouadi.com/tags/qos/ Recent content in Qos on Hugo en Fri, 10 Sep 2010 21:31:13 +0200 https://wassimaouadi.com/technotes/ciscoqos/ Fri, 10 Sep 2010 21:31:13 +0200 https://wassimaouadi.com/technotes/ciscoqos/ <p>verify that QoS is enabled: <img src="https://wassimaouadi.com/images/oldblog/ciscoqos01.jpg" alt="sc1"></p> <p>Enable QoS: <img src="https://wassimaouadi.com/images/oldblog/ciscoqos02.jpg" alt="sc2"></p> <p>At this stage, all interfaces are by default untrusted. This means that any frame with a priority value will be remarked as CoS/IP Precedence/DSCP value = 0.</p> <p>Trust CoS values of incoming frames. Useful for trunks: <img src="https://wassimaouadi.com/images/oldblog/ciscoqos03.jpg" alt="sc3"></p> <p>Trust CoS values only if an attached Cisco ip phone exists (conditional trust): <img src="https://wassimaouadi.com/images/oldblog/ciscoqos04.jpg" alt="sc4"></p> <p>At this stage, the trust boundary moves to the IP phone. Any priority value of any attached PC frames is untrused, thus remarked with priority 0.</p>