Quality of Service (QoS): Managing Bandwidth More Effectively

Using QoS Classifiers To Configure QoS for Outbound Traffic

Executing this command displays the current ToS configuration and shows that the selected DSCP is not currently in use.

The 000110 codepoint is unused, and thus available for directly assigning an 802.1p priority without changing the packet’s DSCP.

Note: All codepoints without a “DSCP Policy” entry are available for direct 802.1p priority assignment.

Figure 6-16. Example Showing Codepoints Available for Direct 802.1p Priority Assignments

Outbound IP packets with a DSCP of 000110 will have a priority of 7.

Notice that codepoints 000000 and 001001 are named as DSCP policies by other codepoints (000001 and 000110 respectively). This means they are not available for changing to a different 802.1p priority.

Figure 6-17. Example of a Type-of-Service Configuration Enabling Both Direct 802.1p Priority Assignment and DSCP Policy Assignment

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