Hello All,

The TCP timer settings I use to connect to 3000's from Comcast cable and 
then VPN into HP's network to talk to 3000's is:

Path:  NETXPORT.GPROT.TCP

[Y]       Checksum Enabled (Y For Yes, N For No)

[4096 ]   Maximum Number of Connections

[1  ]     Retransmission Interval Lower Bound (Secs)
[360  ]   Maximum Time to Wait For Remote Response (Sec)
[2  ]     Initial Retransmission Interval (Secs)
[8  ]     Maximum Retransmissions per Packet

[600  ]   Connection Assurance Interval (Secs)
[4  ]     Maximum Connection Assurance Retransmissions

File:  NMCONFIG.PUB.SYS

The "Retransmission Interval Lower Bound " of [1] gives me the best 
performance in cases where single retransmissions are necessary and the 
"Maximum Retransmissions per Packet" of [8] gives me the enough 
retransmissions to successfully keep a TCP connection going over a network 
that is not consistent in it's performance or quality characteristics!

Common characteristics of "the internet" ISP's (Internet Service Providers) 
are inconsistent performance; burst of traffic can slow transfer of data 
buffered in switches; especially image, video and voice traffic - this can 
trigger TCP retransmissions.  Sufficiently large burst of traffic or 
intermittent outage of WAN (Wide Area Network) links can result in data 
buffered in switches being discarded as buffers reach full conditions - this 
will trigger TCP retransmissions.

I hope this helps.

Regards,

James Hofmeister
Email: <first>.<last>@hp.com
Hewlett Packard - Global Solutions Engineering (WTEC)
P.S. My Ideals are my own, not necessarily my employers.


Subject: [HP3000-L] possible solution to performance issues with FTP client 
on HP3000


This was posted to me today.  I'll report back when we've tested it...

<clip>

Basically this change is recommended by HP to solve an issue with
emailing large FTP files.  It will require a reboot afterwards.

1) Decrease the initial and lower bounds Retransmission Intervals in
NMMGR TCP Protocol config.
... 

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