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Quality of Service (QoS): Managing Bandwidth More Effectively
Using QoS Classifiers To Configure Quality of Service for Outbound Traffic
Options for Assigning Priority. Priority control options for packets from
a specified source-port include:
802.1p priority
DSCP policy (Assigning a new DSCP and an associated 802.1p priority;
inbound packets must be IPv4.)
(For operation when other QoS classifiers apply to the same traffic, refer to
“Classifiers for Prioritizing Outbound Packets” on page 15-8.)
Assigning a Priority Based on Source-Port Only
This option assigns a priority to all outbound packets having the specified
source-port. You can configure this option by either specifying the source-port
ahead of the qos command or moving to the port context for the port you want
to configure for priority. (If you are configuring multiple source-ports with the
same priority, you may find it easier to use the port context instead of
individually configuring the priority for each port.)
Syntax: interface [ e ] < port-list > qos priority < 0 - 7 >
Configures an 802.1p priority for outbound packets
e
ntering the switch through the specified (source)
ports. This priority determines the packet queue in the
o
utbound port(s) to which traffic from the source-ports
is sent. If a packet leaves the switch in a tagged VLAN,
i
t carries the 802.1p priority with it to the next down-
stream device. You can configure one QoS classifier for
each source-port or group of source-ports. (Default:
No-
override
)
no interface [ e ] < port-list > qos
Di
sables use of the specified source-port(s) for QoS
classifi
er(s) and resets the priority for the specified
source-port(s) to No-override.
show qos vlan-priority
Lists the QoS VLAN-ID classifiers with their priority
data.
15-45