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Quality of Service (QoS): Managing Bandwidth More Effectively
Using QoS Types To Configure QoS for Outbound Traffic
For example, an edge switch “A” in an untagged VLAN assigns a DSCP of
000110 on IP packets it receives on port A6, and handles the packets with high
priority (7). When these packets reach interior switch “B” you want the switch
to handle them with the same high priority. To enable this operation you would
configure an 802.1p priority of 7 for packets received with a DSCP of 000110,
and then enable diff-services:
Figure 6-15. Example Showing Codepoints Available for Direct 802.1p Priority
Assignments
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.
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