Port Status and Basic Configuration

QoS Pass-Through Mode on the Series 2800 Switches

An 802.1Q VLAN tagged packet carries an 802.1p priority setting (0-7). If the switch receives a tagged packet, it is placed into the appropriate queue based on the frame's 802.1p priority setting. The mapping with/without QoS Pass- Through Mode is as follows:

802.1p Priority

Prioritization Queue Placement

Setting

 

 

Default QoS

QoS Passthrough

 

 

Setting

Mode

 

 

 

1

1 (low)

2 (normal)

 

 

 

2

1 (low)

2 (normal)

 

 

 

0 or

2 (normal)

2 (normal)

Unspecified

 

 

 

 

 

3

2 (normal)

2 (normal)

 

 

 

4

3 (medium)

2 (normal)

 

 

 

5

3 (medium)

2 (normal)

 

 

 

6

4 (high)

4 (high)

 

 

 

7

4 (high)

4 (high)

 

 

 

How to enable/disable QoS Pass-Through Mode

QoS Pass-Through Mode is disabled by default, and is available only in I.07.52 and later switch software versions.

Synta [no] qos-passthrough-mode

x:write memory reload

The above command sequence enables QoS pass-through mode. The no form of the command sequence disables QoS pass- through mode. (Default: Disabled)

For example:

HP ProCurve Switch 2824(config)# qos-passthrough-mode Command will take effect after saving configuration and reboot

HP ProCurve Switch 2824(config)# write memory HP ProCurve Switch 2824(config)# reload

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