multicast-suppression

Function

The multicast-suppression command configures multicast traffic suppression in the QoS profile.

The undo multicast-suppression command cancels multicast traffic suppression in the QoS profile.

By default, multicast suppression is not configured in the QoS profile view.

Format

multicast-suppression cir cir-value [ cbs cbs-value ] [ inbound | outbound ]

undo multicast-suppression [ inbound | outbound ]

Parameters

Parameter	Description	Value
cbs cbs-value	Specifies the CBS, that is the depth of the first token bucket (assume it to C bucket).	The value is an integer in the range of 0 bytes to 4,294,967,295 bytes. The cbs-value must be greater than the configured cir-value. The default value varies with the value of cir-value: cbs-value = cir-value * 187. If cir-value<100000 kbit/s, the default value of cbs-value equals cir-value * 187 (in bytes). If cir-value >=100000 kbit/s, the default value of cbs-value equals 100000*187 (in bytes).
inbound	Indicates the inbound direction of an interface.	-
outbound	Indicates the outbound direction of an interface.	-
cir cir-value	Specifies the CIR, that is, the committed traffic rate.	The value is an integer that ranges from 0 kbit/s to 4,294,967,295 kbit/s

Views

QoS profile view

Default Level

2: Configuration level

Task Name and Operations

Task Name	Operations
qos	write

Usage Guidelines

Usage Scenario

When multicast packets grow on a network, resources consumed by multicast packets increase accordingly, affecting running services on the network.

The multicast-suppression command configures multicast traffic suppression in the QoS profile. When the number of multicast packets exceeds the configured threshold, the system drops excess multicast packets so that the multicast traffic volume can be restricted within a proper range.

Precautions

The multicast suppression in the QoS profile does not take effected in VLL scenario.

To achieve accurate packet suppression, you should specify a value for the CBS that is 10 times the length of the packet.

Direction-oriented and directionless multicast suppression cannot be configured at the same time. If direction-oriented multicast suppression is configured on an interface, the configuration takes effect only when the direction to which the QoS profile applies is the same as the direction configured for multicast suppression.

Example

# Configure multicast suppression on a QoS profile named test. Set the CIR of packets to 38400 kbit/s. If the traffic rate is equal to or less than 38400 kbit/s, packets are sent normally. Otherwise, packets are discarded.

<HUAWEI> system-view
[~HUAWEI] qos-profile test
[*HUAWEI-qos-profile-test] multicast-suppression cir 38400