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Path MTU discovery terminal command?
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mubach
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Join Date: Nov 2004
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May 31, 2005, 01:58 AM
 
I've been trying to improve my upload/download speed, and after running lots and lots of diagnostic tests I adjusted my MTU to something that suits adsl over PPoE. However, all my tests show that path MTU discovery is turned off (which greatly reduces my upload speed, I am on AT&T DSL 1.5mb, upload speed theoretically should reach 128kb/s), but I get a measily 10kb/s if I am lucky).

Is there a terminal command to turn path MTU discovery on? Here are some system stats if they you need them:

iMac G5 rev A. 1.6ghz
AT&T 1.5mb ADSL (run by covad apparently) using PPoE
Connected to a wireless ("g") network using airport extreme card and an airport express (the one with itunes streaming) basestation.
Mac OS X Tiger 10.4.1

If you have any other general suggestions/fixes to aid my upload speed, feel free to chime in.

Thanks in advance

EDIT: Seems path mtu discovry is set to on by default, wonder why my test shows its off ;/
(Last edited by mubach; May 31, 2005 at 02:49 AM. )
     
John Strung
Senior User
Join Date: Aug 2000
Location: Ancaster, Ontario, Canada
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May 31, 2005, 08:25 AM
 
You can set the MTU in your Network Prefs under Ethernet. The usual number for PPPoE is 1492.
     
   
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