VMware ACE EN-000042-00 User Manual download pdf (Page 240)

BLADE OS 6.1 Command Reference

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 Chapter 4: Configuration Commands BMD00133, November 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 traffic, and

provide different priority levels.

802.1p Configuration

This feature provides the VFSM 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 bits are given forwarding

preference over packets with numerically lower priority bits value.

Table 126 802.1p Configuration Commands

Command Syntax and Usage

qos transmit-queue mapping <priority (0-7)> <COSq number>

Maps the 802.1p priority of to the Class of Service queue (COSq) priority. Enter the 802.1p

priority value (0-7), followed by the Class of Service queue that handles the matching traffic.

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 (0-1), followed by the scheduling weight (0-15).

Command mode: Global configuration

qos transmit-queue number-cos {2|8}

Sets the number of Class of Service queues (COSq) for switch ports. Depending on the

numcos setting, the valid COSq range for the priq and qweight commands is as follows:

 If numcos is 2 (the default), the COSq range is 0-1.

 If numcos is 8, the COSq range is 0-7.

You must apply, save, and reset the switch to activate the new configuration.

Command mode: Global configuration

show qos transmit-queue

Displays the current 802.1p parameters.

Command mode: All except User EXEC

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VMware ACE EN-000042-00 User Manual Page 240