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MTU settings
Authored by: chrome on Aug 11, '04 02:55:22PM

My home router has an MTU of 1492. It plays hell with my mac, and I get similar problems to you.

A temporary fix is to sudo ifconfig en1 mtu 1400. (if en1 is your active interface)

Give it a go. It might work ;)

Lowering the MTU permanently is on my list of things to figure out for OSX, but I'm not sure where to start.

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MTU settings (duex)
Authored by: wsdr on Aug 11, '04 05:39:56PM

Many routers allow you to change the MTU, and some DSL modems (Bellsouth) require the MTU to be 1492 or lower. We ran in to similar problems with LinkSys routers which defaulted to MTU of 1500. Changing the router's MTU to 1492 (or 1400, anything under 1493) solved the problems.

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MTU settings
Authored by: MrPhil on Aug 12, '04 12:38:13PM

Wouldn't the MTU problem show up with other network activity? The mail sending is the only problem we have.

Running the script changes what address the mac uses for and seems to fix the problem. I am going to start watching to see which bugger is the problem.

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MTU settings
Authored by: Melton on Aug 13, '04 04:50:42AM

In Panther (10.3), go to your Network System Preference, select the Ethernet button and adjust your MTU there.

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