Applying Policy - 3Com 3C13636 Configuration Manual

3Com Router 3000 Ethernet Family
Configuration Guide

3.6.5 Applying Policy

The qos apply policy command maps a policy to an interface. One policy can be
applied on multiple interfaces.
Perform the following configuration in interface, subinterface, or ATM PVC view.
Table 3-54 Apply a policy to the interface or ATM PVC
Apply a policy to the interface or ATM
PVC
Delete the policy from the interface or
ATM PVC
dynamic applies only to the dial or VT interface configured with MP for dynamic policy
application. Before applying a QoS policy to such a dial or VT interface, use the qos
max-bandwidth command to configure adequate bandwidth for running the policy.
I. Applying a QoS policy in interface (except for ATM interface) view
CBQ could not be applied to an interface encapsulated with X.25 or LAPB.
The VT interface referenced by common physical port and MP can apply the policy
configured with various features, including remark, car, gts, queue af, queue ef,
queue wfq, wred, etc.
The policy configured with TS (e.g. gts) and queue (e.g. queue ef, queue af, queue
wfq) features cannot be applied on the inbound interface as the input direction
policy.
The subinterface does not support queue (e.g. queue ef, queue af, queue wfq)
feature but support TS (e.g. gts) and TP (e.g. car). The policy configured with TS
and TP can be applied on the sub-interface.
II. Applying a QoS policy in subinterface view
When configuring an LR or CBQ policy for a subinterface, consider the following:
All QoS restrictions applied to the main interface take effect on the subinterface.
When policy embedding is used, CBQ must be configured in the child policy
instead of the parent policy.
In a QoS policy, LR cannot be configured using the lr percent command.
If queuing is configured on the main interface, it can be FIFO only.
The policy configured on the main interface cannot include LR behaviors.
The sum of the LRs configured for all subinterfaces cannot exceed the available
bandwidth of the main interface. (Available interface bandwidth refers to the
interface bandwidth configured using the qos max-bandwidth command or the
physical interface bandwidth when command is not configured.)
Operation
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3-33
Chapter 3 Congestion Management
Command
qos apply policy
{ inbound | outbound [ dynamic ] }
undo qos apply policy { inbound |
outbound }
policy-name