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ping loss once add more loads

Latest reply: Dec 24, 2018 01:35:23 1703 6 4 0 0

【Problem Description】

The switch is running now at its optimum. Now once we add more customer networks now , the switch starts to ping loss ( CPU utilization never reaching to 60% , which is “huawei” suggested optimum level ) with CPU utilizations  notmore than 40 %  to 42 %, that means its starts to fail once its CPU is 42%only.

【Problem Analysis】

suggest customer adjust the CPCAR value as follow to avoidpacket loss:

[Huawei] cpu-defend policy defend

[Huawei-cpu-defend-policy-defend] auto-port-defend enable

[Huawei-cpu-defend-policy-defend] auto-port-defend protocol arp-request threshold 1000

[Huawei-cpu-defend-policy-defend] auto-port-defend protocol arp-reply threshold 1000

[Huawei-cpu-defend-policy-defend] auto-port-defend protocol icmp threshold 1000

[Huawei-cpu-defend-policy-defend] car packet-type arp-request cir 512 cbs 288000

[Huawei-cpu-defend-policy-defend] car packet-type arp-reply cir 512 cbs 288000

[Huawei-cpu-defend-policy-defend] car packet-type arp-miss cir 512 cbs 288000

[Huawei-cpu-defend-policy-defend] car packet-type icmp cir 512 cbs 288000

[Huawei-cpu-defend-policy-defend] auto-defend enable

[Huawei-cpu-defend-policy-defend] auto-defend alarm enable

[Huawei-cpu-defend-policy-defend] auto-defend action deny


[Huawei] cpu-defend-policy defend

[Huawei] cpu-defend-policy defend global


  • x
  • convention:
Created Nov 13, 2018 01:32:50

When the CPU usage of the device is too high, you can observe whether the device or network has the following conditions:
Whether the CPU usage of the device is continuously high or instantaneously high. The momentary increase may be caused by an operation, such as the device just starting up, reading the optical module information at a certain point in time, increasing the instantaneous traffic, etc., generally does not affect the operation of the device.
Check what task process caused the CPU usage to be too high and analyze the task.
Check the log and alarm information to determine whether there is a hardware failure alarm.
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  • x
  • convention:

Created Nov 13, 2018 01:55:12

so this is an example to configure cpu-defend , right?

thanks for sharing us such a good example, I loss once add more loads-2799807-1
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  • x
  • convention:

Created Nov 27, 2018 07:30:26

hi author , i want to know protocol car value how to adjust ? i mean the value how to discern ?for example , arp-request threshold 1000 , this value whether effect the really arp-request packets ? if the arp-request discard by device , i think customer services will be impact .
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  • x
  • convention:

Created Nov 27, 2018 13:30:46

Load balancing is based on the existing network structure. It provides a cheap, effective and transparent way to expand the bandwidth of network devices and servers, increase throughput, strengthen network data processing capabilities, and improve network flexibility and availability. Load Balance (Load Balance) means to be allocated to multiple units of operation for execution.
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  • x
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Created Dec 22, 2018 01:34:05

Load Balance (Load Balance) means to be allocated to multiple units of operation for execution.
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  • x
  • convention:

Created Dec 24, 2018 01:35:23

Learn more, great
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  • x
  • convention:


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