HP 6120XG HP ProCurve Series 6120 Blade Switches Advanced Traffic Management G - Page 207
Notes on Changing a Priority Setting, Error Messages caused by DSCP Policy Changes
View all HP 6120XG manuals
Add to My Manuals
Save this manual to your list of manuals |
Page 207 highlights
Quality of Service (QoS): Managing Bandwidth More Effectively Differentiated Services Codepoint (DSCP) Mapping Notes on Changing a Priority Setting If a QoS classifier is using a policy (codepoint and associated priority) in the DSCP Policy table, you must delete or change this usage before you can change the priority setting on the codepoint. Otherwise the switch blocks the change and displays this message: Cannot modify DSCP Policy < codepoint > - in use by other qos rules. In this case, use show qos < classifier > to identify the specific classifiers using the policy you want to change; that is: show qos port-priority show qos type-of-service For example, suppose that the 000001 codepoint has a priority of 6, and several classifiers use the 000001 codepoint to assign a priority to their respective types of traffic. If you wanted to change the priority of codepoint 000001 you would do the following: 1. Identify which QoS classifiers use the codepoint. 2. Change the classifier configurations by assigning them to a different DSCP policy, or to an 802.1p priority, or to No-override. 3. Reconfigure the desired priority for the 000001 codepoint. 4. Either reassign the classifiers to the 00001 codepoint policy or leave them as they were after step 2, above. Error Messages caused by DSCP Policy Changes Refer to the following table on ways to fix errors that may be generated when configuring DSCP policy changes. Message DSCP Policy < decimal-codepoint > not configured Meaning You have attempted to map a QoS classifier to a codepoint for which there is no configured priority (No-override). Use the qos dscp-map command to configure a priority for the codepoint, then map the classifier to the codepoint. 5-36