Technical data

RackSwitch G8000 ISCLI Reference
Chapter 4: Configuration Commands
 157BMD00128, September 2009
Quality of Service Configuration
Quality of Service (QoS) commands configure the 802.1p priority value and DiffServ Code
Point value of incoming packets. This allows you to differentiate between various types of traf-
fic, and provide different priority levels.
802.1p Configuration
This feature gives the switch the capability to filter IP packets based on the 802.1p bits in the
packet's VLAN header. The 802.1p bits specify the priority that you should give to the packets
while forwarding them. The packets with a higher (non-zero) priority are given forwarding
preference over packets with numerically lower priority value.
Table 4-49 802.1p Configuration Commands
Command Syntax and Usage
qos transmit-queue mapping {<priority (0-7)>} {<COSq number>}
Maps the 802.1p priority value to a Class of Service queue (COSq) number. Enter the 802.1p
priority value, followed by the Class of Service queue that handles the matching traffic.
Note that priority value 7 is reserved for Stacking.
Command mode: Global configuration
qos transmit-queue weight-cos {<COSq number>} {<weight (0-15)>}
Configures the weight of the selected Class of Service queue (COSq). Enter the queue
number followed by the scheduling weight (0-15).
Command mode: Global configuration
qos transmit-queue number-cos {1|7}
Sets the number of Class of Service queues (COSq) for switch ports. Note that one COSq is
reserved for Stacking.
Command mode: Global configuration
show qos transmit-queue
Displays the current 802.1p parameters.
Command mode: All except User EXEC