On Fri, Feb 07, 2003 at 10:49:16PM +0800, Todd Gruhn wrote:

> WHY IS MTU getting cut from 1500 to 542 when I run the ppp-on script?
> Shouldn't it stay at 1500? (Maybe this is just the first time I noticed it

This surely explains the problems you are seeing.

Use pppd's "debug" option to write a logfile of the ppp protocol negotiation,
that will show what's going on.

The MTU is one of the things negotiated between your machine and the peer (your
ISP).

Martin