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OSN 500 550 580 V100R008C50 Alarms and Performance Events Reference 02

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IGSP_ENTRIES_EXC

IGSP_ENTRIES_EXC

Description

The IGSP_ENTRIES_EXC alarm is reported when the number of IGMP Snooping multicast table entries exceeds its upper threshold, and will be cleared when the number of IGMP Snooping multicast table entries is smaller than its lower threshold.

Attribute

Alarm Severity Alarm Type
Minor Security alarm

Parameters

When you view an alarm on the network management system, select the alarm. In the Alarm Details field display the related parameters of the alarm. The alarm parameters are in the following format: Alarm Parameters (hex): parameter1 parameter2...parameterN. For details about each parameter, refer to the following table.

Name Meaning
Parameter 1

Indicates whether the number of IGMP Snooping multicast table entries exceeds its upper threshold.

  • 0x00: indicates that the number of IGMP Snooping multicast table entries does not exceed its upper threshold.
  • 0x01: indicates that the number of IGMP Snooping multicast table entries exceeds its upper threshold.
Parameter 2

Indicates whether the number of IGMP Snooping multicast group members exceeds its upper threshold.

  • 0x00: indicates that the number of IGMP Snooping multicast group members does not exceed its upper threshold.
  • 0x01: indicates that the number of IGMP Snooping multicast group members exceeds its upper threshold.

Impact on the System

After the IGSP_ENTRIES_EXC alarm is reported, the IGMP Snooping multicast table has no more space for learning new table entries. As a result, some IGMP service packets will be discarded.

Possible Causes

  • Cause 1: The configured upper threshold for the number of IGMP Snooping multicast table entries is too small.
  • Cause 2: IGMP Snooping protocol attack packets are generated on the network.

Procedure

  1. Cause 1: The configured upper threshold for the number of IGMP Snooping multicast table entries is too small.
    1. Check whether the configured upper threshold for the number of IGMP Snooping multicast table entries is too small. If the upper threshold is too small, set another larger value according to the network plan.
    2. Check whether the alarm is cleared. If it persists, go to 2.
  2. Cause 2: IGMP Snooping protocol attack packets are generated on the network.
    1. Check whether IGMP Snooping protocol attack packets are generated on the network. Upon detection of any IGMP Snooping attack packets, locate the attack source and shield it.
    2. Check whether the alarm is cleared. If the alarm persists, contact Huawei technical support engineers to handle the alarm.

Related Information

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Updated: 2019-01-21

Document ID: EDOC1100020975

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