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Support Documentation

Log Reference

CloudEngine 8800, 7800, 6800, and 5800 V200R005C00

This document provides the explanations, causes, and recommended actions of logs on the product.

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SECURITYTRAP/4/LDM_STRACK_IFVLAN

SECURITYTRAP/4/LDM_STRACK_IFVLAN

Message

SECURITYTRAP/4/LDM_STRACK_IFVLAN: Attack occurred. (Interface=[Interface],CVLAN=[CVLAN], PVLAN=[PVLAN], EndTime=[EndTime], TotalPackets=[TotalPackets])

Description

The system detected attacks on an interface.

Parameters

Parameter Name Parameter Meaning
Interface Interface index
CVLAN Inner VLAN tag of an attack packet sent by a user
PVLAN Outer VLAN tag of an attack packet sent by a user
EndTime Time when the last attack packet is received
TotalPackets Number of received attack packets

Possible Causes

Cause: The rate at which packets were sent by a user (Interface + VLAN) to the CPU exceeded the alarm threshold.

Procedure

  • Cause: The rate at which packets were sent by a user (Interface + VLAN) to the CPU exceeded the alarm threshold.
    1. Run the display auto-defend attack-source command to check potential attack sources and to determine whether the packet transmission rate is abnormal.

      • If the packet transmission rate is abnormal, go to Step 2.

      • If the packet transmission rate is normal, go to Step 7.

    2. Check the number of users on the interface that receives attack packets.

      • If there is only one user, go to Step 3.

      • If there are multiple users, go to Step 5.

    3. Check whether this user sent the attack packets.

      • If this user sent the attack packets, go to Step 4.

      • If this user did not send the attack packets, go to Step 7.

    4. Run the shutdown command to shut down the interface. Then, check whether the fault is rectified. If the fault persists, go to Step 7.
    5. Check whether one of the users sent the attack packets.

      • If one of the users sent the attack packets, go to Step 6.

      • If none of the users sent the attack packets, go to Step 7.

    6. Add the user who sent attack packets to a blacklist and check whether the fault is rectified. If the fault persists, go to Step 7.
    7. Collect trap, log, and configuration information, and contact technical support personnel.
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Updated: 2019-04-20

Document ID: EDOC1100039602

Views: 168896

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