Chapter 21
| Class of Service Commands
Priority Commands (Layer 3 and 4)
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Priority Commands (Layer 3 and 4)
This section describes commands used to configure Layer 3 and 4 traffic priority
mapping on the switch.
qos map cos-queue
This command maps CoS/CFI values in incoming packets to per-hop behavior for
priority processing. Use the
no
form to restore the default settings.
Syntax
qos map cos-queue
queue
from
cos0 cfi0...cos7 cfi7
no qos map cos-dscp
cos0 cfi0...cos7 cfi7
queue - Per-hop behavior, or the priority used for this router hop.
(Range: 0-7)
cos - CoS value in ingress packets. (Range: 0-7)
cfi - Canonical Format Indicator. Set this parameter to “0” to indicate that
the MAC address information carried in the frame is in canonical format.
(Range: 0-1)
Table 108: Priority Commands (Layer 3 and 4)
Command Function Mode
qos map cos-queue Maps CoS/CFI values in incoming packets to per-hop
behavior, or the queue used for this router hop
IC
qos map dscp-queue Maps DSCP values in incoming packets to per-hop
behavior, or the queue used for this router hop
IC
qos map trust-mode Sets QoS mapping to DSCP or CoS IC
show qos map cos-queue Shows ingress CoS to egress queue map PE
show qos map dscp-queue Shows ingress DSCP to eqress queue map PE
show qos map trust-mode Shows the QoS mapping mode PE
* The default settings used for mapping priority values to internal DSCP values and back to the
hardware queues are designed to optimize priority services for the majority of network
applications. It should not be necessary to modify any of the default settings unless a queuing
problem occurs with a particular application.
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