RE: TCP performance

From: Johnson, Gregory LCDR ([email protected])
Date: Thu May 17 2001 - 11:45:03 EDT

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220 ms seems pretty low - have you measured the actual RTT on the satellite
link? What speed is the satellite link? What MTU size are you using?

-Greg

LCDR Gregory W. Johnson
Ass't Prof. Electrical Engineering

USCG Academy
New London CT

860-444-8683

-----Original Message-----
From: Dusan Statelov [mailto:[email protected]]
Sent: Thursday, May 17, 2001 11:13 AM
To: [email protected]
Subject: TCP performance

Hello:

We are investigating reasons of poor TCP/ip performance over satellite.

We expect to get single TCP/ip performance of Windows size/RTT but in a
fact windows size does not influence performance at all.
We are working ni Windows NT platform.
In a LAN we get 180 kbyte/s the same system over sat falls to 25 kbyte/s

RTT is 220 ms windows size set to 64 kbyte.

I would appreciate your response and assistance.

-- Best regards

Dusan Statelov Managing Director Main Data,s.r.o. mailto:[email protected]

Tel: +421 7 54789 586 Fax: +421 7 54789 585 GSM: +421 905 606 027 http://www.maindata.sk

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