Performance tuning the network controller (MTU)
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| + | ''<font color=red><small> | ||
| + | This article | ||
| + | Based on work by tklee, briand, frontalot, and nix. | ||
| + | Originally by frontalot. | ||
| + | at Linkstationwiki.org | ||
| + | </small></font>''<br> | ||
* Every time you send a 1500 size packet out on a MTU1492 network you end up with two packets: 1492 + 8. That's why the speed drops - The second packet is almost empty! If you type: | * Every time you send a 1500 size packet out on a MTU1492 network you end up with two packets: 1492 + 8. That's why the speed drops - The second packet is almost empty! If you type: | ||
Revision as of 20:37, 30 June 2006
This article
Based on work by tklee, briand, frontalot, and nix.
Originally by frontalot.
at Linkstationwiki.org
- Every time you send a 1500 size packet out on a MTU1492 network you end up with two packets: 1492 + 8. That's why the speed drops - The second packet is almost empty! If you type:
ifconfig eth0
- It will show:
MTU = 1500
- The standard MTU[1] for DSL and cable is 1492 maximum, for DSL via PPPoE[2] it is often 1480 (you best ask your provider for the correct value). You can:
- Add the following line to one of your startup files in the start section, e.g. in
/etc/init.d/networking
/sbin/ifconfig eth0 mtu 1492
- Add "mtu 1492" (a line by itself) to
/etc/network/interfaces
