Junos upgrade on J2350 through USB

‎06-25-2014 07:50 AM

Hi all,

I was given a J2350 with Junos 8.R1.4 and since I already have a J2350 with 9.3R1.7, I'd like to upgrade Junos. I do not have a FTP server so I tried to use USB. But unfortunately I was unsuccessful. This the procedure I tried, taken from:




1) On the J2350 with 93.R1.7 I connected a USB pen (bought to a supermarket) and then tried to format it with the shell command : 

root@host% dd if=/dev/zero of=/dev/da0 bs=128k


Here I had the first problem. The document says that the operation takes several minutes. Bue after one hour the router still gave no sign that operation was over so I lost my patience and stopped the operation typing a ctrl-C. Anyway it seemed that everything worked.


2) I checked all the steps in the document up to the seventh and then I issued a:


root@host> request system snapshot media usb partition


I then checked the result of this operation with the following commands :


root@host% mount /dev/da0s1a /altroot

root@host% mount /dev/da0s1e /altconfig

root@host% ls /altroot

root@host% ls /altconfig


and everything seemed OK.


Then after unmountingdevices /dev/da0s1a and /dev/da0s1e, I extracted the USB pen and connected it to the other J2350. Big problem ! This router recognized the introduction of the USB pen but as soon as I tryed to mount it, I was given the following message:


root@host% mount /dev/da0s1 /var/tmp/usb

mount: /dev/da0s1: Block device required


It seems as the new J2350 (the one with the older Junos) does not recognizes the device da0s1.


Any idea on how to get around the problem ?

One more question. Is it possible to act in a cisco-like fashion and use a router as an FTP server ? Things would be much simpler. I searched on Junos documentation but did not find anything.


I understand that having an FTP server would be much simpler, but I'd like to test all the options.


Thanks a lot in advance for your cooperation.



Re: Junos upgrade on J2350 through USB

‎06-26-2014 11:31 PM



J-series procedures:




if it does not , then try these SRX upgrade procedures .



Thanks & Regards,


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