On Oct 4, 2011, at 10:14 AM, Adam Hughes wrote:

> I am having a weird issue where one of our appliances goes out-of-sync with 
> the manager about every two hours, then after we console into the server it 
> comes back up and we didn’t change anything.  We are running 4.9 and 3310’s 
> and the server is an oob virtual gateway layer 2.  We are not seeing anything 
> in the logs as we have a tac case open already.  Any suggestions?
>  

I'm working with Adam Hughes on this now, but for the benefit of others who 
might run into this, it appears to be related to console output (on the serial 
console) being stalled by a terminal server using flow control. When the 
console flushes its buffer, network connectivity resumes.

A potential workaround might be to turn off flow control.

Javier Henderson
[email protected]

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