The article has been redirected to a more elaborate article: KB20569 [juniper.net]
The "file archive compress" method can be used to collect all /var/log files from all members of an EX Switch Virtual Chassis (VC). This is useful for troubleshooting purposes or for providing detailed logs to Juniper Technical Assistance Center (JTAC).
/var/log
This article explains how to collect these files using the method specified.
Use the commands listed below to archive /var/log/ directory files from Primary (FPC0) and Backup (FPC1):
/var/log/
{master:0} root> file archive compress source /var/log/ destination /var/tmp/varlog-mem0 {master:0} root> request session member 1 (use appropriate member id to login to that FPC) root% cli {backup:1} root> file archive compress source /var/log/ destination /var/tmp/varlog-mem1 {backup:1} root> exit root% exit {master:0} root> file copy fpc1:/var/tmp/varlog-mem1.tgz fpc0:/var/tmp/
Now you can open a J-Web session to the EX switch by using http:// <Ip-address-EX> and you can download the files using this path: Maintain > Files > Temporary Files ( /var/tmp ).
http:// <Ip-address-EX>
/var/tmp
NOTE: Another method is by using the " tar " command from shell. This is documented in KB15186 - Alternate method using the tar command to collect /var/log files from all members of an EX Switch Virtual Chassis (VC) [juniper.net] .
tar
2020-08-06: Added KB20569 [juniper.net] to related links
2021-04-05: Updated the article terminology to align with Juniper's Inclusion & Diversity initiatives