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NE40E V800R010C10SPC500 Configuration Guide - IP Multicast 01

This is NE40E V800R010C10SPC500 Configuration Guide - IP Multicast
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(Optional) Configuring a Limit on the Number of PIM Entries

(Optional) Configuring a Limit on the Number of PIM Entries

PIM-DM allows you to limit the number of (S, G) and (*, G) entries separately. After a specified limit is reached, new entries of the corresponding type cannot be created.


Limit the number of PIM entries to prevent a device from generating excessive multicast routing entries when attackers send numerous multicast data or IGMP/PIM protocol messages. Therefore, this function helps prevent high memory and CPU usage and improve multicast service security.


  1. Run system-view

    The system view is displayed.

  2. Run multicast global limit pim dm { star-group-number | source-group-number } limit-count [ threshold-alarm upper-limit upper-limit-value lower-limit lower-limit-value ]

    A limit on the number of PIM entries and alarm trigger and clear thresholds are set. After the command is run:

    • After the specified limit is reached, new entries cannot be created, and the PIM_1. routeExceed alarm is generated.

      New (*, G) entries can be manually added.

    • If threshold-alarm upper-limit upper-limit-value is set, the PIM_1. routeThresholdExceed alarm is generated when the percentage ratio of created PIM entries to the specified limit reaches upper-limit-value.

  3. Run commit

    The configuration is committed.

Updated: 2019-01-03

Document ID: EDOC1100055017

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