Chapter 19
| 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 97: Priority Commands (Layer 3 and 4)
Command
Function
Mode
Maps CoS/CFI values in incoming packets to per-hop
behavior, or the queue used for this router hop
IC
Maps DSCP values in incoming packets to per-hop
behavior, or the queue used for this router hop
IC
Sets QoS mapping to DSCP or CoS
IC
Shows ingress CoS to egress queue map
PE
Shows ingress DSCP to eqress queue map
PE
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.