limit (IGMP)

Function

The limit command sets the maximum number of IGMP entries that can be created globally or in an instance.

The undo limit command restores the maximum number of IGMP entries that can be created globally or in an instance to the default value.

The following lists the maximum number of IGMP entries that can be created globally or in an instance on each model by default:

S5720-LI, S5720S-LI: 1022
S5731-S, S5731S-S, S5720I-SI, S5720S-SI, S5720-SI: 1024
S5735-L, S5735S-L, S5735S-L-M, S5735-S, S5735S-S, S5735-S-I: 1500
S5730-SI, S5730S-EI, S6720-LI, S6720S-LI, S6720-SI, S6720S-SI: 1536
S6730-S, S6730S-S: 4096
S5720-EI, S5720-HI, S5730-HI, S5731-H, S5731S-H, S5732-H, S6720-EI, S6720-HI, S6720S-EI, S6730-H, S6730S-H: 8192

Format

limit number

undo limit

Parameters

Parameter	Description	Value
number	Specifies the maximum number of IGMP entries that can be created globally or in the current instance.	The value is an integer that ranges from 1 to The maximum number of IGMP entries that can be created globally or in an instance by default. NOTE: The value range of S5720-HI, S5730-HI, S5731-H, S5731S-H, S5732-H, S6720-HI, S6730S-H, and S6730-H are expanded after the high specification mode is configured for multicast forwarding using the set multicast forwarding-table super-mode command. The actual value range depends on the specification of the device.

Views

IGMP view of the public network instance, IGMP view of a VPN instance

Default Level

2: Configuration level

Usage Guidelines

Usage Scenario

This command sets the maximum number of IGMP entries supported globally or in an instance.

When the number of IGMP entries reaches the limit, the system does not create any IGMP entries. To enable the switch to create more IGMP entries, delete useless entries or increase the limit. Alternatively, create static IGMP entries.

The number of IGMP entries is counted as follows:

Each (*, G) entry is counted as one entry.
Each (S, G) entry is counted as one entry.
Each (*, G) entry established with SSM mapping is counted as one entry.

Prerequisites

IP multicast routing has been enabled using the multicast routing-enable command.

Precautions

You can also run the igmp global limit number command in the system view to set the maximum number of global IGMP group memberships. If both the limit and igmp global limit number commands are executed, the smaller value takes effect.

Example

# Set the maximum number of IGMP entries that can be created globally to 248.

<HUAWEI> system-view
[HUAWEI] multicast routing-enable
[HUAWEI] igmp
[HUAWEI-igmp] limit 248