Configuring multicast stream limitation on a VLAN

Configure multicast stream limitation on a VLAN to limit the number of concurrent multicast streams on the VLAN. By limiting the number of concurrent multicast streams, providers can protect the bandwidth on a specific interface and control access to multicast streams.

About this task

You can configure the maximum number of streams independently. After the number of streams reaches the limit, the VLAN drops joins to new streams. A service provider uses this feature to control the overall bandwidth usage in addition to restricting users from attaching more than the allowed television sets to a link.

Note

Configuration of multicast stream limitation is not supported on a node configured as the DvR Leaf within a DvR domain.

Procedure

Enter VLAN Interface Configuration mode:

enable

configure terminal

interface vlan <1–4059>
Enable multicast stream limitation and configure the maximum number of allowed streams:

ip igmp stream-limit stream-limit-max-streams <0-65535>
If stream-limit is already enabled on the VLAN, change the maximum number of allowed streams:

ip igmp stream-limit stream-limit-max-streams <0-65535>
Display multicast stream limitation information for the ports on a specific interface:

show ip igmp stream-limit port

Example

Enable multicast stream limitation and configure the maximum number of allowed streams to 8.

Switch:1(config-if)# ip igmp stream-limit
Switch:1(config-if)# ip igmp stream-limit stream-limit-max-streams 8

Variable definitions

Use the data in the following table to use the ip igmp stream-limit command.


Variable	Value
`<0-65535>`	Configures the maximum number of allowed streams on this VLAN. The range is from 0–65535 and the default is 4.

Job aid

The following tables show the field descriptions for the show ip igmp stream-limit port command.

Table 1. show ip igmp stream-limit port field descriptions
Field	Description
INTERFACE	Indicates the interface IP address.
PORT	Indicates the port for the VLAN.
MAX STREAMS	Indicates the maximum number of streams.
NUM STREAMS	Indicates the current number of streams.