Quality of Service (QoS): Managing Bandwidth More Effectively
Using QoS Classifiers To Configure Quality of Service for Outbound Traffic
3. Assign the DSCP policies to the selected UDP/TCP port applications and
display the result.
Classifier
DSCP Policy
Figure 8-11. The Completed DSCP Policy Configuration for the Specified
UDP/TCP Port Applications
The switch will now apply the DSCP policies in figure 8-11 to IPV4 packets
received in the switch with the specified UDP/TCP port applications. This
means the switch will:
â– Overwrite the original DSCPs in the selected packets with the new DSCPs
specified in the above policies.
â– Assign the 802.1p priorities in the above policies to the selected packets.
QoS IP-Device Priority
QoS Classifier Precedence: 2
The IP device option, which applies only to IPv4 packets, enables you to use
up to the following IP address limits (source or destination) as QoS classifiers:
â– 5300xl Switches: 256 IP addresses
â– 3400cl/6400cl Switches: 60 IP addresses
Where a particular device-IP address classifier has the highest precedence in
the switch for traffic addressed to or from that device, then traffic received
on the switch with that address is marked with the IP address classifier’s
configured priority level. Different IP device classifiers can have differing
priority levels.
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