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>