3Com 4500G Family Configuration Manual page 509

If a user profile is active, the QoS policy, except ACLs referenced in the QoS policy, applied to it
cannot be configured or removed. If the user profile is being used by online users, the referenced
ACLs cannot be modified either.
The QoS policies applied in user profile view support only the remark, car, and filter actions.
Do not apply an empty policy in user profile view because a user profile with an empty policy
applied cannot be activated.
Applying the QoS policy to a VLAN
You can apply a QoS policy to a VLAN to regulate traffic of the VLAN.
Follow these steps to apply the QoS policy to a VLAN:
To do...
Enter system view
Apply the QoS policy to VLANs
QoS policies cannot be applied to dynamic VLANs, for example, VLANs created by GVRP.
Do not apply a QoS policy to a VLAN and the ports in the VLAN at the same time.
Applying the QoS policy globally
You can apply a QoS policy globally to the inbound direction of all ports.
Follow these steps to apply the QoS policy globally:
To do...
Enter system view
Apply the QoS policy globally
A QoS policy containing any of the nest, remark customer-vlan-id, and remark service-vlan-id
Actions cannot be applied globally.
Use the command...
system-view
qos vlan-policy policy-name
vlan vlan-id-list inbound
Use the command...
system-view
qos apply policy policy-name
global inbound
2-7
Remarks
—
Required
Remarks
—
Required