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Alarm Handling

S9300, S9300E, and S9300X V200R010C00

This document provides the explanations, causes, and recommended actions of alarms on the product.
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L2IFPPI_1.3.6.1.4.1.2011.5.25.160.3.9 hwMflpMacAddrAlarm

L2IFPPI_1.3.6.1.4.1.2011.5.25.160.3.9 hwMflpMacAddrAlarm

Description

L2IFPPI/4/MFLPMACBLOCK:OID [oid] Loop exists in VLAN [INTEGER], MAC Address [OCTET1] blocked, block-time is [GAUGE], the former Interface [OCTET2], the latter Interface [OCTET3], for [OCTET4].

MAC address flapping occurred and the MAC address was blocked.

Attribute

Alarm ID Alarm Severity Alarm Type
1.3.6.1.4.1.2011.5.25.160.3.9 Warning equipmentAlarm(5)

Parameters

Name Meaning
oid Indicates the ID of the MIB object.
INTEGER Indicates the VLAN ID.
OCTET1 Indicates the blocked MAC address.
GAUGE Indicates the block time.
OCTET2 Indicates the interface where the MAC address is learned before MAC address flapping occurs.
OCTET3 Indicates the interface where the MAC address is learned after MAC address flapping occurs.
OCTET4 Indicates the blocking cause.

Impact on the System

Traffic cannot be received normally.

Possible Causes

Cause 1:

The interfaces where loops occurred were added to the same VLAN.

Cause 2:

Cables were connected incorrectly.

Cause 3:

STP was enabled to remove loops on the network.

Procedure

  1. Connect cables on the interfaces correctly and check whether the alarm persists.

    • If so, go to step 2.
    • If not, no further action is required.

  2. Check whether the two interfaces that learn the same MAC address can be added to different VLANs according to the networking.

    • If so, go to step 3.
    • If not, go to step 4.

  3. Modify the configuration and add the two interfaces that learn the same MAC address to different VLANs. Then check whether the alarm persists.

    • If so, go to step 4.
    • If not, no further action is required.

  4. Check whether the ring network meets requirements.

    • If so, go to step 7.
    • If not, go to step 5.

  5. Do as follows to remove loops:

    (1) Check information about the two interfaces that learn the same MAC address in the alarm.

    (2) Shut down one interface according to the networking.

    (3) Run the reset loop-detect eth-loop vlan vlan-id { all | interface interface-type interface-number | mac-address mac-address } command to delete the blocked MAC address.

  6. Check whether the alarm recovery message is received.

    • If so, no further action is required.
    • If not, go to step 7.

  7. Enable STP. Then check whether the alarm persists.

    • If so, contact technical support personnel.
    • If not, no further action is required.

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Updated: 2019-08-21

Document ID: EDOC1000142054

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