ip netstream sampler except deny-action

Function

The ip netstream sampler except deny-action command configures NetStream sampling not to be applied to traffic matching the ACL rule or traffic behavior of deny.

The undo ip netstream sampler except deny-action command configures NetStream sampling to be applied to traffic matching the ACL rule or traffic behavior of deny.

By default, NetStream is applied to traffic matching the ACL rule or traffic behavior of deny.

Format

ip netstream sampler except deny-action

undo ip netstream sampler except deny-action

Parameters

None

Views

Traffic behavior view

Default Level

2: Configuration level

Task Name and Operations

Task Name	Operations
qos	write

Usage Guidelines

Usage Scenario

When NetStream sampling is configured and an ACL rule or traffic behavior of deny is configured for multi-field (MF) classification, the device performs NetStream sampling on the packets that match the ACL rule or traffic behavior by default. If a large number of packets matching the deny ACL rule or traffic behavior are sent, an exception alarm is generated. However, these packets are discarded and do not trigger any traffic exception. As a result, the device incorrectly generates the alarm. To resolve this problem, configure NetStream sampling not to be applied to packets matching the ACL rule or traffic behavior of deny.

Prerequisites

Run the ip netstream sampler to slot self command in the slot view.
Configure interface- or flow-specific sampling. To configure interface-specific sampling, run the ip netstream sampler command in the system view or interface view; To configure flow-specific sampling, run the ip netstream sampler command in the traffic behavior view.
Run the deny command in the traffic behavior view or run the rule command with deny being specified in the ACL view.

Precautions

This command is supported only in interface ACL scenarios.

Example

# Configure NetStream sampling not to be applied to traffic matching traffic behavior b1 that contains deny.

<HUAWEI> system-view
[~HUAWEI] traffic behavior b1
[*HUAWEI-behavior-b1] deny
[*HUAWEI-behavior-b1] ip netstream sampler except deny-action