CUCM 11.5.1.11900-26 - Possible Bug During COP File Download using FTP?

[Kirill Klimakhin]

Hi all, 

Was running into a peculiar issue today while trying load new DX80 code into the CUCM using an FTP install process. 

The CUCM kept coming back after I've selected the file I want to download telling me that the file is inaccessible and to check my permissions. 

The file I selected was: cmterm-dx80.10-2-5-212.k3.cop.sgn

When the download failed repeatedly, I looked at the log on the FTP server and the CUCM was actually calling for this:

(000011)10/5/2016 12:26:31 PM - cisco (10.50.51.30)> 250 CWD successful. "/" is current directory.
(000011)10/5/2016 12:26:31 PM - cisco (10.50.51.30)> EPSV
(000011)10/5/2016 12:26:31 PM - cisco (10.50.51.30)> 229 Entering Extended Passive Mode (|||54492|)
(000011)10/5/2016 12:26:31 PM - cisco (10.50.51.30)> LIST cmterm-dx80.10-2-5-212.k3.cop.sgnþ|
(000011)10/5/2016 12:26:31 PM - cisco (10.50.51.30)> 550 Directory not found.
(000011)10/5/2016 12:26:31 PM - cisco (10.50.51.30)> QUIT

Notice the weird characters at the end of the requested file from the CUCM. 

So afterwards, I tried to use a different code version, and it produced a similar result with a different set of characters appended to the file name:

(000004)10/5/2016 11:43:07 AM - cisco (10.50.51.30)> 250 CWD successful. "/" is current directory.
(000004)10/5/2016 11:43:07 AM - cisco (10.50.51.30)> EPSV
(000004)10/5/2016 11:43:07 AM - cisco (10.50.51.30)> 229 Entering Extended Passive Mode (|||53252|)
(000004)10/5/2016 11:43:07 AM - cisco (10.50.51.30)> LIST cmterm-dx80.10-2-5-207.k3.cop.sgn¾7
(000004)10/5/2016 11:43:07 AM - cisco (10.50.51.30)> 550 Directory not found.
(000004)10/5/2016 11:43:07 AM - cisco (10.50.51.30)> QUIT

Next I changed my upload method to use SFTP instead, and the files installed without a problem first try. 

I've never seen this issue come up before and was wondering what would cause these extra characters to be appended? One thing to note, the additional characters were the same every time the server requested the files, they were not random. 

I've installed other COP files on this server and have not had this issue prior to installing the DX80. 

Thoughts? Should TAC have a look?

[Jaime Valencia]

I'd get a sniffer to confirm if that's actually what CUCM is requesting or not, unless I'm wrong, the logs you posted are from the FTP, right??

If CUCM is indeed adding those weird characters, then most likely this is indeed a bug.

[Kirill Klimakhin]

Hi Jamie, 

This is a production system and I did not investigate the issue far enough to try using a sniffer. I am not sure. 

I've installed multiple COP files on this system and hundreds of others using the same laptop and the same version of FileZilla and I've never had an issue with using FTP to upload updates into the CUCM. 

[Manish Gogna]

I don't see any documented bug for this kind of behavior with FTP and DX80 on any CUCM version. As Jaime said to confirm if CUCM is at fault we should get a packet capture from CUCM if you are interested in finding if this is a bug or fault on CUCM side.

Manish

[Alexandru Zamfir]

Hitting the same bug here. Different firmware exactly same behavior. Same CUCM version. 

[tbsjbhifi]

Running into the same issue, however with the CM combined network locale. CUCM 11.5.

Switching to SFTP does fix the issue...