Support Support Downloads Knowledge Base Case Manager My Juniper Community

Knowledge Base

Search our Knowledge Base sites to find answers to your questions.

Ask All Knowledge Base Sites All Knowledge Base Sites JunosE Defect (KA)Knowledge BaseSecurity AdvisoriesTechnical BulletinsTechnotes Sign in to display secure content and recently viewed articles

[vMX] How to collect the VFP logs and copy them to VCP in vMX



Article ID: KB34887 KB Last Updated: 16 Aug 2019Version: 2.0

When troubleshooting an issue, you may need to collect the /var/log/ from the Virtual Forwarding Plane (VFP).  Additionally, if the connectivity to the FTP / SFTP server is via the Virtual Control Plane (VCP), then you'll need to copy the logs to VCP. 

  1. Log into VFP shell with root credentials. Use command 'start shell pfe network base-os fpc0'

    labroot@jtac-vm-host-180> start shell user root    
    root@jtac-vm-host-180:/var/home/labroot # cli
    labroot@jtac-vm-host-180> start shell pfe network base-os fpc0   
    Last login: Thu Aug  1 19:35:11 UTC 2019 from on pts/0
  2. Tar the logs using the command, 'tar -czf /var/tmp/filename.tgz /var/log/*'

    For the verbose output, use 'tar -cvzf /var/tmp/vfp-logs-Aug1.tgz /var/log/*'

    root@vfp-vmx2:~# tar -czf /var/tmp/vfp-logs-Aug1.tgz /var/log/*
    tar: Removing leading `/' from member names
    root@vfp-vmx2:~# cd /var/tmp/
    root@vfp-vmx2:/var/tmp# ls -l | grep vfp-logs-Aug1
    -rw-r--r--    1 root     root        628446 Aug  1 19:35 vfp-logs-Aug1.tgz
  3. Copy the logs to the VCP using the scp command, 'scp filename username@​'

    Note: You cannot use root credentials to do scp.  You need a username and password to do it.

    root@vfp-vmx2:/var/tmp# scp vfp-logs-Aug1.tgz labroot@
    Could not create directory '/root/.ssh'.
    The authenticity of host ' (' can't be established.
    ECDSA key fingerprint is 50:d4:92:1a:2a:c5:ab:59:97:2b:a2:cf:34:22:83:36.
    Are you sure you want to continue connecting (yes/no)? yes
    Failed to add the host to the list of known hosts (/root/.ssh/known_hosts).
    vfp-logs-Aug1.tgz                100%  614KB 613.7KB/s   00:00    
    labroot@jtac-vm-host-180> file list detail /var/tmp/ | grep vfp-logs-Aug1
    -rw-r--r--  1 labroot wheel    628446 Aug 1  19:28 vfp-logs-Aug1.tgz​
Modification History:
2019-08-16: minor title correction.
Comment on this article > Affected Products Browse the Knowledge Base for more articles related to these product categories. Select a category to begin.

Getting Up and Running with Junos

Getting Up and Running with Junos Security Alerts and Vulnerabilities Product Alerts and Software Release Notices Problem Report (PR) Search Tool EOL Notices and Bulletins JTAC User Guide Customer Care User Guide Pathfinder SRX High Availability Configurator SRX VPN Configurator Training Courses and Videos End User Licence Agreement Global Search