Brocade 6910 Ethernet Access Switch Configuration Guide (Supporting R2.2.0.0) - Manual (Page 476)

420 Brocade 6910 Ethernet Access Switch Configuration Guide
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Priority Commands (Layer 3 and 4)
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.
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)
D EFAULT S ETTING
Command Mode
Interface Configuration (Port)
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
TABLE 98 Priority Commands (Layer 3 and 4)
Command Function Mode
TABLE 99 Default Mapping of CoS/CFI to Internal PHB/Drop Precedence
CFI
CoS
0 1
0 (0,0) (0,0)
1 (1,0) (1,0)
2 (2,0) (2,0)
3 (3,0) (3,0)
4 (4,0) (4,0)
5 (5,0) (5,0)
6 (6,0) (6,0)
7 (7,0) (7,0)