CHANNEL SIZE.

[Damien Miller]

On Wed, 23 Apr 2008, Terry Shiplcark wrote:

> Recently I updated to Hardy Heron(Ubuntu beta) and with it cam
> openssh-client 4.7p1.  In my environment we have alot of
> Extreme(www.extremenetworks.com) switch devices which we access via
> ssh.  
> 
> 4.7p1 would no longer allow me to connect to the switches, however 4.6p1
> would. The error I received was.
> 
> ' channel 0: open failed: resource shortage: Channel open failed'
> 
> I did some diggin and noticed these two constants where changed between
> 4.6 and 4.7
> 
> #define CHAN_SES_WINDOW_DEFAULT (4*CHAN_SES_PACKET_DEFAULT)
> #define CHAN_TCP_WINDOW_DEFAULT (4*CHAN_TCP_PACKET_DEFAULT)
> 
> Changing the new value of 64*, back to 4*, solved the issue.
> 
>    - markus at cvs.openbsd.org 2007/06/11 09:14:00
>      [channels.h]
>      increase default channel windows; ok djm
> 
> Its probably an issue with our switches, but that is something I
> probably cannot get rectified.

Please send a full debug trace (from "ssh -vvv ...") - I'm particularly
interested in the server banner. It appears in the debug trace like this:

debug1: Remote protocol version 2.0, remote software version OpenSSH_5.0

-d