Hello,

up to my (non-expert) knowledge
you can set tcp window size on various cisco devices.
The default seems to be 4128,
the command to change it is
ip tcp window-size <0-65535>

I never tried to change it ;)

regards
Juraj Salak


Es gibt tatsächlich auf den Cisco Geräten einen 
> Befehl der die
> Windowsize betrifft (ip tcp window-size <0-65535>), 
> standardmäßig steht
> dieser Wert auf 4128. Wenn ich das richtig interpretiere 
> würde das bedeuten
> dass bis zu 4128 

> -----Original Message-----
> From: Zlatko Krastev [mailto:acit AT ATTGLOBAL DOT NET]
> Sent: Friday, November 15, 2002 1:14 AM
> To: ADSM-L AT VM.MARIST DOT EDU
> Subject: Re: Poor Performance
> 
> 
> What kind of Cisco is this?
> I am unaware of any Cisco non-networking device (if we assume iSCSI as
> half-networking) and networking ones should not mess with 
> your TCP (OSI
> level 4; they ought to deal with IP - OSI level 3). Even if 
> it really does
> look inside TCP stream it should not limit you to only 16kB! 
> They ought to
> support RFC1323 and TCP window larger than 64 kB.
> 
> Zlatko Krastev
> IT Consultant
> 
> 
> 
> 
> 
> 
> Lawrie Scott <lawries AT COMPAREXAFRICA.CO DOT ZA>
> Sent by: "ADSM: Dist Stor Manager" <ADSM-L AT VM.MARIST DOT EDU>
> 12.11.2002 10:53
> Please respond to Lawrie Scott
> 
> 
>         To:     ADSM-L AT VM.MARIST DOT EDU
>         cc:
>         Subject:        Re: Poor Performance
> 
> 
> Hi all
> 
> Thanx for all the replies some of the tricks have helped a 
> bit. However
> the TCPWindowsSize of 16 is set as CISCO has a limitation of
> TCPwindowsize of 16 and whenever we increase it to 63 the server then
> begins to timeout server requests and no backups happen.
> 
> 
> Lawrie Scott
> For: Persetel / Q Vector KZN
> Company Registration Number: 1993/003683/07
> Tel: +27 (0) 31 5609222
> Fax: +27 (0) 31 5609495
> Cell: +27 (0) 835568488
> E-mail:  lawries AT comparexafrica.co DOT za
> <mailto:lawries AT comparexafrica.co DOT za>
>