TCP/IP Speed

Unanswered Question
Jun 16th, 2008
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Hi to all.Maybe someone can suggest me the tunning to do for my problem.

I have 2 cisco routers with a 10Mb/s-full duplex WAN connection each.If I do an FTP between from a PC on site 1 to a pc on site 2 I reach 9.8Mb/s.Great!!!!

If I transfer the same file using a simple Microsoft Copy/Paste I'm not able to do a better transfer than 4Mb/s.

What I've done:

1)Put all may LAN-switch interfaces to full-duplex 100.

2)Set all the possible MTU's to 1500.

3)Did some traffic shaping on the wan link to smoothen out the bottle neck:

policy-map 3111-RM2

class class-default

bandwidth 1000

policy-map 3111-RM2-OUT

class class-default

shape average 10000000

service-policy 3111-RM2

interface GigabitEthernet4/1/0.897

service-policy output 3111-RM2-OUT

With all these things I managed to get a speed (with copy/paste) of 6Mb/s.

Does anyone have any suggestions on what else I can do or maybe missing?Is it correct that I loose that much speed if I don't use FTP? Do you think I might be albe to do better if I use some tcp adjust-mms (about 1452) on my routers?

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Joseph W. Doherty Mon, 06/16/2008 - 03:39
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Duplicate post with one labeled "lan or wan ?" within "WAN, Routing and Switching" forum.

sirdudesly Mon, 06/16/2008 - 05:02
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There is a fair amount of overhead using windows copy and paste so you would expect it to be slightly slower.


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