No relevant resource is found in the selected language.

This site uses cookies. By continuing to browse the site you are agreeing to our use of cookies. Read our privacy policy>Search

Reminder

To have a better experience, please upgrade your IE browser.

upgrade

Alarm Handling

S9300, S9300E, and S9300X V200R010C00

This document provides the explanations, causes, and recommended actions of alarms on the product.
Rate and give feedback:
Huawei uses machine translation combined with human proofreading to translate this document to different languages in order to help you better understand the content of this document. Note: Even the most advanced machine translation cannot match the quality of professional translators. Huawei shall not bear any responsibility for translation accuracy and it is recommended that you refer to the English document (a link for which has been provided).
SECE_1.3.6.1.4.1.2011.5.25.165.2.2.2.12 hwARPMissSIPSpeedLimitALarm

SECE_1.3.6.1.4.1.2011.5.25.165.2.2.2.12 hwARPMissSIPSpeedLimitALarm

Description

SECE/4/ARPMISS_SIP_SPEEDLIMIT_ALARM:OID [oid] The arp-miss packet speed with source ip [OCTET] exceed the speed-limit value configed [INTEGER].

The rate of ARP Miss messages with the specified source IP address exceeded the configured alarm threshold.

Attribute

Alarm ID Alarm Severity Alarm Type
1.3.6.1.4.1.2011.5.25.165.2.2.2.12 Warning equipmentAlarm(5)

Parameters

Name Meaning
oid Indicates the ID of the MIB object.
OCTET Indicates the source IP address of packets.
INTEGER Indicates the alarm threshold.

Impact on the System

If the alarm is generated, the user traffic volume exceeds the threshold. The device discards excess traffic. As a result, user traffic may be interrupted intermittently.

Possible Causes

If a host sends a large number of IP packets with unresolvable destination IP addresses to attack a device (the device has a route to the destination IP address of a packet but has no ARP entry matching the next hop of the route), the device generates a large number of ARP Miss messages. When the rate of ARP Miss messages with the specified source IP address exceeds the alarm threshold, the device generates the alarm.

Procedure

  1. Run the reset cpu-defend statistics command to clear statistics on the ARP Miss messages sent to the CPU.
  2. Wait for 1 minute, and run the display cpu-defend statistics all command to check the number of ARP Miss messages sent to the CPU within 1 minute. Check whether a large number of packets are discarded:

    • If so, locate the attack source according to the IP address in the alarm information and check whether the attack source is attacked by viruses.

      • If so, you are advised to remove viruses from the user host. You can also add the address of the user to the blacklist or configure a blackhole MAC address entry to discard ARP Request messages sent by the attacker.

      • If not, go to step 3.

    • If not, verify that the network is secure and use either of the following methods to prevent generation of this alarm:

      • Run the arp-miss speed-limit source-ip [ ip-address ] maximum 0 command to disable the rate limit on ARP Miss messages based on source IP addresses.

        • If ip-address is not specified, ARP Miss message rate limiting is disabled for all source IP addresses. If a large number of ARP Miss messages are generated for a certain source IP address, the CPU usage may be excessively high.
        • If ip-address is specified, ARP Miss message rate limiting is disabled for this source IP address. If a large number of ARP Miss messages are generated for the source IP address, the CPU usage may be excessively high.
      • Run the info-center source SECE channel 4 log state off command to disable the device from sending SECE alarm information.

  3. Run the display arp anti-attack configuration arpmiss-speed-limit command to check the configuration of source-based ARP Miss suppression.
  4. Run the arp-miss speed-limit source-ip [ ip-address ] maximum maximum command to modify the maximum rate of ARP Miss messages based on the site requirements.
  5. If the alarm is frequently generated, collect alarm information and contact technical support personnel.
Translation
Download
Updated: 2019-08-21

Document ID: EDOC1000142054

Views: 192702

Downloads: 44

Average rating:
This Document Applies to these Products
Related Version
Related Documents
Share
Previous Next