Filter
Top Products
Quality of Service (QoS): Managing Bandwidth More Effectively
Using QoS Classifiers To Configure Quality of Service for Outbound Traffic
Syntax: qos < udp-port | tcp-port > < tcp or udp port number > dscp < codepoint >
Assigns a DSCP policy to packets having the specified
TCP or UDP application port number and overwrites
the DSCP in these packets with the assigned
<codepoint>
value. This policy includes an 802.1p priority and
determines the packet’s queue in the outbound port to
which it is sent. If the packet leaves the switch in a
tagged VLAN, it carries the 802.1p priority with it to
the next downstream device. (Default:
No-override)
no qos < udp-port | tcp-port > < tcp-udp port number >
Deletes the specified UDP or TCP port number as a QoS
classifier.
show qos tcp-udp-port-priority
Displays a listing of all TCP and UDP QoS classifiers
currently in the running-config file.
For example, suppose you wanted to assign these DSCP policies to the packets
identified by the indicated UDP and TDP port applications:
Port Applications DSCP Policies
DSCP Priority
23-UDP 000111 7
80-TDP 000101 5
914-TDP 000010 1
1001-UDP 000010 1
1. Determine whether the DSCPs already have priority assignments, which
could indicate use by existing applications. (Also, a DSCP must have a
priority configured before you can assign any QoS classifiers to use it.)
The DSCPs for this
example have not yet
been assigned an
802.1p priority level.
Figure 15-4. Display the Current DSCP-Map Configuration
15-18