{ unknown-unicast-suppression | broadcast-suppression | multicast-suppression } cir (VSI view)

Function

The broadcast-suppression cir command configures the maximum volume of broadcast traffic that all sub-interfaces in a VSI can forward.

The undo broadcast-suppression command restores the default configuration.

The multicast-suppression cir command configures the maximum volume of multicast traffic that all sub-interfaces in a VSI can forward.

The undo multicast-suppression command restores the default configuration.

The unknown-unicast-suppression cir command configures the maximum volume of unknown unicast traffic that all sub-interfaces in a VSI can forward.

The undo unknown-unicast-suppression command restores the default configuration.

By default, unknown unicast, broadcast, and multicast traffic are not suppressed on sub-interfaces in a VSI.

Format

{ unknown-unicast-suppression | broadcast-suppression | multicast-suppression } cir cir-value [ cbs cbs-value ] { uni-inbound | uni-outbound }

undo { unknown-unicast-suppression | broadcast-suppression | multicast-suppression } [ cir cir-value [ cbs cbs-value ] ] { uni-inbound | uni-outbound }

Parameters

Parameter	Description	Value
cir cir-value	Specifies the committed information rate (CIR), namely, maximum rate at which multicast traffic is forwarded.	The value is an integer ranging from 0 to 4294967295, in kbit/s.
cbs cbs-value	Specifies the Committed Burst Size (CBS), which is the depth of the first token bucket.	The value is an integer ranging from 0 to 4294967295, in bytes. The default value is determined by cir-value: If cir-value is less than 100000 kbit/s, the default value of cbs-value equals cir-value x (1500/8), in bytes. If cir-value is greater than or equal to 100000 kbit/s, the default value of cbs-value equals 100000 x (1500/8), in bytes.
uni-inbound	Indicates that the upstream traffic is suppressed.	-
uni-outbound	Indicates that the downstream traffic is suppressed.	-

Views

VSI-AUTO view, VSI-DEFAULT view, VSI-STATIC view

Default Level

2: Configuration level

Task Name and Operations

Task Name	Operations
mac	write

Usage Guidelines

Usage Scenario

If unknown unicast, broadcast, or multicast traffic mounts on a network, the traffic consumes a great amount of network bandwidth, deteriorating network performance.

To prevent an unknown unicast, broadcast, or multicast traffic storm, run the { unknown-unicast-suppression | broadcast-suppression | multicast-suppression } cir command to suppress unknown unicast, broadcast, or multicast traffic on a sub-interface. If the unknown unicast, broadcast, or multicast traffic volume exceeds the cirVal, the system discards the excessive unknown unicast, broadcast, or multicast traffic.

Configuration Impact

After unknown unicast, broadcast, or multicast traffic suppression is configured in a VSI, it takes effect on all sub-interfaces in the VSI.

Example

# Set the CIR and CBS for multicast traffic suppression on the upstream inbound interface to 100 kbit/s and 18800 bytes, respectively.

<HUAWEI> system-view
[~HUAWEI] mpls lsr-id 1.1.1.1
[*HUAWEI] mpls
[*HUAWEI-mpls] quit
[*HUAWEI] mpls l2vpn
[*HUAWEI-l2vpn] quit
[*HUAWEI] vsi vsi123
[*HUAWEI-vsi-vsi123] multicast-suppression cir 100 cbs 18800 uni-inbound

# Set the CIR and CBS for broadcast traffic suppression on the upstream inbound interface to 100 kbit/s and 18800 bytes, respectively.

<HUAWEI> system-view
[~HUAWEI] mpls lsr-id 1.1.1.1
[*HUAWEI] mpls
[*HUAWEI-mpls] quit
[*HUAWEI] mpls l2vpn
[*HUAWEI-l2vpn] quit
[*HUAWEI] vsi vsi123
[*HUAWEI-vsi-vsi123] broadcast-suppression cir 100 cbs 18800 uni-inbound

# Set the CIR and CBS for unknown unicast traffic suppression on the upstream inbound interface to 100 kbit/s and 18800 bytes, respectively.

<HUAWEI> system-view
[~HUAWEI] mpls lsr-id 1.1.1.1
[*HUAWEI] mpls
[*HUAWEI-mpls] quit
[*HUAWEI] mpls l2vpn
[*HUAWEI-l2vpn] quit
[*HUAWEI] vsi vsi123
[*HUAWEI-vsi-vsi123] unknown-unicast-suppression cir 100 cbs 18800 uni-inbound