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Attack Defense Overview

Attack Defense Overview Highlighted

Latest reply: Oct 29, 2018 08:50:27 1407 7 10 0
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On networks, there are many risks that may cause overload on the control plane. For example, a large number of viruses and hacker tools are flooded on networks. These viruses and hacker tools may attack network devices, resulting in network breakdown. Address Resolution Protocol (ARP) and Internet Control Message Protocol (ICMP) attacks are often initiated. Attackers use viruses and hacker tools to preempt resources of attacked devices, causing service interruption on the attacked devices. If switches respond to ICMP and ARP packets unconditionally, the CPU usage becomes high when the switches are attacked by viruses. Signaling protocols on the control plane may fail or even switches fail to respond to valid ARP Request packets. Consequently, the switches may break down, causing service interruption.

To solve the preceding problem, switches provide security functions and the functions are increasingly optimized. As a main security function on switches, the central processor committed access rate (CPCAR) function allows switches to classify packets sent to the control plane, limit the rate of these packets, and schedule the packets in queues to ensure security of the control plane.


Local attack defense is implemented based on the following levels:

  • Level 1: The ASIC identifies packets sent to the control plane and limits the rate of or discards packets. The attack defense methods include the CPCAR, blacklist, access control list (ACL), and traffic suppression.
  • Level 2: The ASIC adjusts and shapes various protocol packets using queues. The attack defense methods include the protocol queue adjustment, CPU interface rate limiting, and CPU queue rate limiting (fixed switches).
  • Level 3: The RISC processor limits the rate of various protocol packets, configures anti-spoofing functions, and identifies the attack source using auto-defend. This level is located on the control plane. The attack defense methods include protocol security, ARP anti-spoofing, attack source identification in auto-defend, and traffic rate limiting.
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Created Oct 19, 2018 18:08:29 Helpful(0) Helpful(0)

Thanks, please link this documentation for further detailed reading
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MVE Created Oct 19, 2018 21:29:39 Helpful(0) Helpful(0)

thank you for this info
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Created Oct 24, 2018 09:00:45 Helpful(0) Helpful(0)

 the Alarm information field to determine whether the optical module is certified for Huawei Ethernet switches. If the alarm message "Non-Huawei-Certified Transceiver" or "Non-Huawei-Ethernet-Switch-Certified Transceiver" is displayed, the optical module is not certified for Huawei Ethernet switches. Replace it with one that is certified for Huawei Ethernet switches This post was last edited by littlestone at 2018-10-31 13:57.
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Created Oct 26, 2018 14:30:55 Helpful(0) Helpful(0)

Attack defense is a network security feature that enables a device to analyze the content and behavior of packets sent to the CPU, identify attack packets, and take measures to block attack packets.Attack defense prevents malformed packet attacks, packet fragment attacks, and flood attacks.Attacks initiated by utilizing inherent bugs of communication protocols or improper network deployment have great impact on networks. In particular, attacks on a network device can cause the device or network to crash. This post was last edited by Mark.hu at 2018-10-31 14:00.
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Created Oct 27, 2018 16:31:50 Helpful(0) Helpful(0)

On networks, there are many risks that may cause overload on the control plane. For example, a large number of viruses and hacker tools are flooded on networks. These viruses and hacker tools may attack network devices, resulting in network breakdown.  we usually meet this kind of attack in the network but do not know how to deal with, thanks for sharing us a good example, I learned a lot. This post was last edited by Torrent at 2018-10-31 14:05.
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Created Oct 27, 2018 16:33:58 Helpful(0) Helpful(0)

the attack is occurred in network usually, sometime we need professional device to do this, it is recommended that buy the  professional device to do this

This post was last edited by No.9527 at 2018-10-31 11:14.
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Created Oct 29, 2018 08:50:27 Helpful(0) Helpful(0)

The switches provide security functions and the functions are increasingly  optimized. As a main security function on switches, the central processor  committed access rate (CPCAR) function allows switches to classify packets sent  to the control plane, limit the rate of these packets, and schedule the packets  in queues to ensure security of the control plane. So we should configuration the attach or cpu cpcar ? This post was last edited by SupperRobin at 2018-10-31 15:18.
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