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Ask questions and share experiences about the SRX Series, vSRX, and cSRX.
  • 1.  vSRX in GNS3

    Posted 02-05-2019 21:09

    Hi Guys, 

    Hope someone can help me with this. Spend 8 hours to solve but failed. Basically trying to setup a vSRX lab in GNS3, it slowed down my machine horribly, always at 99% CPU usage - almost unusable now. 


    Full details:

    vSRX - junos-vsrx-12.1X47-D15.4

    VirtualBox 5.2

    GNS3 1.4.4

    OS is Windows 10 on esxi

    Allocated 4 CPU 3.75

    RAM 12GB


    Created 2 vSRX, connected via ge-0/0/0 -> ge-0/0/0

    Result: Both srx(virtualbox vm) is running at 99% CPU usage. 


    Googled and found people advising idle-pc setting, but i dont see any such feature in GNS3(when i right click on my Junos device). 


    Could you please help here? Is there any other alternatives to avoid high CPU usage, or even alternative to GNS3? Any advise for a good lab setup for JNCIA?







  • 2.  RE: vSRX in GNS3

    Posted 02-05-2019 21:21

    Since you have ESXi setup, you can directly deploy vSRX on it.


  • 3.  RE: vSRX in GNS3

    Posted 02-05-2019 21:50


    In 2019, Juniper vLabs (free after registering) are the way to go




  • 4.  RE: vSRX in GNS3

    Posted 07-09-2022 13:01
    Thanks this saved my day! 
    I was struggling in configure vSRX on GNS3  it didn't work and there isn't any savvy community able to handle troubleshooting, so your tip of used labs from here was the best choice.