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VDX6720 Firmware Update NOS 4.1.3b

VDX6720 Firmware Update NOS 4.1.3b

New Contributor II
Hello All.
I'm trying to update my VDX6720 to the latest 4.1.3d
Setup the ftp, can log on etc.. but the switch doesn't update.
I think I might be missing the plist file.
These are the files I have in the zip :

I set up the FileZilla ftp correctly, Can access the ftp, read write del etc...
But got stuck at the file name ? maybe ? do I need to put the .zip ? I unzipped the files into a folder.
Took a screenshot of everything for you to see :

Here is the command I typed in to back up the entire switch before update:
Switch#: copy startup-config ftp://vdx:vdx6720@

This is what I get: Error while transfering file over ftp. Please check the host IP address, user/password, and the permission and space left on the remote directory.

Can someone point the way please.

New Contributor II
Hi Mike

I did extracted the entire zip.
It is located in the same exact location as the backed up "running config".
The backing up config saved fine. No issue.

The backed up file is in location


If you look at the pict in the first image link, you will see the entire dir listing and the files in there.
The BK folder is also there and the backed up config is in there.

View solution in original post



You still need the the FW?

New Contributor
Hi everyone,

I apologize for dropping in, but I have the same issue many seem to have. My VDX6720 at 3.0.1 and I am trying to get to 4.1.3d. Can someone help me get the firmware files needed to upgrade from 3.0.1 to 4.1.3d?


Hi all, 

I've got a couple of 6720s' running nos2.1.0. I have nos4.1.3d. I tried to update to 4.1.3d but received an error that I need to update to nos4.1.0 first. I don't have nos4.1.0 so can anyone share?

New Contributor

Can you help me with the latest firmware too?