> On Jul 23, 2014, at 8:43 AM, [email protected] wrote:
> 
> Hello,
> 
> I've got a pair of new ASR-9904 routers running IOS-XR 5.1.1 to which I've 
> applied SP2. Both pre and post-SP2 I keep having connectivity problems with 
> my normal SSH client, putty on Windows. When a lot of data is being sent at 
> once from the router to my client, putty will disconnect and give me the 
> error: "Disconnected: Server protocol violation: unexpected 
> SSH2_MSG_CHANNEL_FAILURE packet". I can connect to the same device all day 
> long using OpenSSH 6.2p2 from a FreeBSD machine with no issues. Has anyone 
> else seen this issue and possibly have a workaround or settings to tweak in 
> putty to prevent it from constantly being disconnected? FWIW, I've 
> experienced similar incompatibilities with putty in the past with other 
> network vendors, but it seems the network vendors always acknowledge the 
> issue on their end and fix it in future code that they release rather than a 
> fix for putty coming out to address it. I'm suspecting putty may be overly 
> strict with certain protocol compliance!
> . Regardless, it would just be nice to use my tools that I manage all my 
> other devices with and not have to deviate to a workaround. I do have some 
> ASR-9001's also in production but they are still running older 4.2.3 code and 
> I've never had this issue on them.

Hi Vinny,

On PuTTY go to:

Configuration -> Connection -> SSH -> Bugs

And set “Chokes on PuTTY’s SSH-2 ‘windadj’ requests” to On (the default is 
Auto).

Javier Henderson
[email protected]



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