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Executing "Request Support Information" and other large command outputs on QFX5100 console port session could cause instability

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Article ID: TSB16535 TECHNICAL_BULLETINS Last Updated: 10 Oct 2014Version: 1.0
Alert Type:
PSN - Product Support Notification
Alert Description:
A QFX5100 switch in any mode (standalone, Virtual Chassis, or Virtual Chassis Fabric), if you issue the "request support information" command, or command with large output e.g <tcpdump> on the console port, this action might cause system instability and Layer 2 / Layer 3 protocols might transition down and up.
Solution:
A QFX5100 switch in any mode (standalone, Virtual Chassis, or Virtual Chassis Fabric), if you issue the "request support information" command, or commands with large output e.g <tcpdump> on the console port session , this action might cause system instability and Layer 2 / Layer 3 protocols might transition down and up.

Pleas refer to the PR's listed below:
  • PR 979206 - QFX5100 VC/VCF: "request support information" command on console port session causes instability
  • PR 979206 - Running tcpdump or issuing CLI show command on the console may cause system instability and all protocols including lacp, stp flaps continuously.

Workaround: 

  • As most of these commands are typically used for debugging purposes, it is recommended to use an SSH session for executing these commands. If SSH is not available, the output of these commands should be redirected to a file instead of displaying it on console session.
This issue is being investigated and will be fixed in future releases.
Implementation:
 
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