ECS4660-28F_Management Guide-R03

C HAPTER 41 | Class of Service Commands
Priority Commands (Layer 3 and 4)
– 1393 –
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 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)
DEFAULT SETTING.
COMMAND MODE
Interface Configuration (Port)
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.
Table 174: Priority Commands (Layer 3 and 4)
Command Function Mode
Table 175: 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)