multicast ipv6 forwarding-table route-limit

Function

The multicast ipv6 forwarding-table route-limit command sets the limits on the number of entries in the IPv6 multicast forwarding table.

The undo multicast ipv6 forwarding-table route-limit command restores the default value of the limit.

The following lists the maximum number of entries allowed in the IPv6 multicast forwarding table of each model by default:

S5720-LI, S5720S-LI: 496
S5730-SI, S5730S-EI, S6720-LI, S6720S-LI, S6720-SI, S6720S-SI: 512
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
S5720-EI, S5732-H, S6720-HI, S6730-H, S6730S-H: 2048
S6730-S, S6730S-S, S5720-HI, S5730-HI, S5731-H, S5731S-H, S6720-EI, S6720S-EI: 4096

Format

multicast ipv6 forwarding-table route-limit limit

undo multicast ipv6 forwarding-table route-limit

Parameters

Parameter	Description	Value
limit	Specifies the limit on the number of entries in the IPv6 multicast forwarding table.	The value is an integer that ranges from 0 to The maximum number of entries allowed in the multicast forwarding table 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

System view

Default Level

2: Configuration level

Usage Guidelines

Usage Scenario

Excessive IPv6 multicast forwarding entries will exhaust the memory of the switch. To prevent this problem, use the multicast ipv6 forwarding-table route-limit command to limit the number of entries in the IPv6 multicast forwarding table.

Prerequisites

IPv6 multicast routing has been enabled globally using the multicast ipv6 routing-enable command in the system view.

Precautions

If the limit on the number of entries in the IPv6 multicast forwarding table is set after multicast services are deployed on a switch, ensure that this limit is greater than or equal to the number of existing forwarding entries. Otherwise, faults may occur.

It is recommended that you set the limit based on the actual network environment before deploying multicast services on the switch.

If the newly-configured limit on the number of entries is smaller than the number of existing entries, the excessive entries are not deleted immediately. The configured limit takes effect in the following cases:

Entries are added to the IPv6 multicast forwarding table after the existing entries age out.
The reset multicast ipv6 forwarding-table all command is executed.

Example

# Set the limit on the number of the entries in the IPv6 forwarding table to 1024.

<HUAWEI> system-view
[HUAWEI] multicast ipv6 routing-enable
[HUAWEI] multicast ipv6 forwarding-table route-limit 1024