Chapter 18
| Class of Service Commands
Priority Commands (Layer 3 and 4)
– 434 –
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-dscp
This command maps CoS/CFI values in incoming packets to per-hop behavior and
drop precedence values for priority processing. Use the
no
form to restore the
default settings.
Syntax
qos map cos-dscp
phb
drop-precedence
from
cos0 cfi0
...
cos7 cfi7
no qos map cos-dscp
cos0 cfi0
...
cos7 cfi7
phb
- Per-hop behavior, or the priority used for this router hop. (Range: 0-7)
drop-precedence
- Drop precedence used for Random Early Detection in
controlling traffic congestion. (Range: 0 - Green, 3 - Yellow, 1 - Red)
cos
- CoS value in ingress packets. (Range: 0-7)
cfi
- Canonical Format Indicator. Set to this parameter to “0” to indicate that
the MAC address information carried in the frame is in canonical format.
(Range: 0-1)
Table 95: Priority Commands (Layer 3 and 4)
Command
Function
Mode
qos map cos-dscp
Maps CoS/CFI values in incoming packets to per-hop
behavior and drop precedence values for internal priority
processing
GC
qos map dscp-mutation
Maps DSCP values in incoming packets to per-hop
behavior and drop precedence values for internal priority
processing
GC
qos map phb-queue
Maps internal per-hop behavior values to hardware queues GC
qos map trust-mode
Sets QoS mapping to DSCP or CoS
IC
show qos map cos-dscp
Shows ingress CoS to internal DSCP map
PE
show qos map
dscp-mutation
Shows ingress DSCP to internal DSCP map
PE
show qos map phb-queue
Shows internal per-hop behavior to hardware 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.
Summary of Contents for EX-3524
Page 2: ......
Page 28: ...Figures 28 ...
Page 34: ...Section I Getting Started 34 ...
Page 58: ...Chapter 1 Initial Switch Configuration Setting the System Clock 58 ...
Page 72: ...Chapter 2 Using the Command Line Interface CLI Command Groups 72 ...
Page 156: ...Chapter 5 SNMP Commands Notification Log Commands 156 ...
Page 164: ...Chapter 6 Remote Monitoring Commands 164 ...
Page 218: ...Chapter 7 Authentication Commands Management IP Filter 218 ...
Page 268: ...Chapter 8 General Security Measures Port based Traffic Segmentation 268 ...
Page 292: ...Chapter 9 Access Control Lists ACL Information 292 ...
Page 312: ...Chapter 10 Interface Commands Power Savings 312 ...
Page 324: ...Chapter 11 Link Aggregation Commands Trunk Status Display Commands 324 ...
Page 366: ...Chapter 15 Address Table Commands 366 ...
Page 428: ...Chapter 17 VLAN Commands Configuring Voice VLANs 428 ...
Page 572: ...Chapter 25 IP Interface Commands IPv6 Interface 572 ...
Page 578: ...Section I Appendices 578 ...