3Com 4210G Series, Configuration Manual, Page: 440 / 1133

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You cannot modify the classification rules, traffic behaviors, and classifier-behavior associations in
a QoS policy already applied. To check whether a QoS policy has been applied successfully, use
the
display qos policy global
command and the
display qos policy interface
command.
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The switch may save the applications of some QoS policies that have failed to be applied due to
insufficient hardware resources in the configuration file. After the switch reboots, these policies
may preempt other user configurations for resources, resulting in loss of configurations. Suppose
that the
user-bind
command is configured on GigabitEthernet 1/0/2, and the application of a QoS
policy to GigabitEthernet 1/0/1 is saved in the configuration file even though the application has
failed due to insufficient resources. After the switch reboots, it may assign resources to have the
QoS policy take effect preferentially, while the
user-bind
configuration may be lost due to
insufficient resources.
Applying the QoS policy to an interface
A policy can be applied to multiple ports. Only one policy can be applied in inbound direction of a
port/port group.
Follow these steps to apply the QoS policy to an interface:
To do… Use the command… Remarks
Enter system view
system-view
—
Enter
interface
view
interface interface-type
interface-number
Enter
interface
view or port
group view Enter port
group view
port-group manual
port-group-name
Use either command
Settings in interface view take
effect on the current interface;
settings in port group view take
effect on all ports in the port
group.
Apply the policy to the
interface/port group
qos apply policy policy-name
inbound
Required
Applying the QoS policy to online users
You can apply a QoS policy to multiple online users, but in one direction of each online user only one
policy can be applied. To modify a QoS policy already applied in a certain direction, remove the QoS
policy application first.
Follow these steps to apply the QoS policy to online users:
To do… Use the command… Remarks
Enter system view
system-view
—