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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
Setting
1
1 (low)
2
1 (low)
0 or
2 (normal)
Unspecified
3
2 (normal)
4
3 (medium)
5
3 (medium)
6
4 (high)
7
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
Port Status and Basic Configuration
QoS Pass-Through Mode on the Series 2800 Switches
QoS Passthrough
Mode
2 (normal)
2 (normal)
2 (normal)
2 (normal)
2 (normal)
2 (normal)
4 (high)
4 (high)
10-27
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Troubleshooting
