From: Trond Myklebust <trond.myklebust@fys.uio.no>
Subject: Re: NFS TCP settings
Date: Thu, 22 Dec 2005 17:41:31 -0500
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To: Dan Stromberg <strombrg@dcs.nac.uci.edu>
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On Wed, 2005-12-21 at 11:02 -0800, Dan Stromberg wrote:

> I have some connection between some pairs of hosts for which all of the
> following appear to be true:
> 
> 1) TCP Window Scaling is enabled on both endpoints
> 2) TCP Window Scaling is mentioned in the initial SYN and SYN/ACK
> 3) tcptrace thinks that TCP Window Scaling isn't happening
> 
> Is there something other than the SYN and SYN/ACK that might cause TCP
> Window Scaling to go away?

Routers/switches that don't support TCP window scaling are a typical
cause.

Cheers,
  Trond



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