Hi Irene,
Although it seems unlikely that any public system would have a weird MTU
- there is something to do to save time.
Never just sequence when trying to find a fixed limit (unless there are very
few possibilities.)
If it is the maximum size that you are trying to find, try using 100 as a
first test to make sure that that will work. If it doesn't very unlikely MTU
is the problem, but you can try values under 100.
If MTU 100 does work jump to 1464, then down to 700 up to 1150, up
to 1300, etc
You can follow the pattern ... roughly half the difference between known good
value and known bad value for each jump.
If you have some idea that it is going to be over 1400 try that value early
in the sequence.
This is fairly standard procedure for finding any unknown limit. (Or it is by
me :) )
/Dave
> From: "Irene Xie" <[EMAIL PROTECTED]>
> To: "ticker" <[EMAIL PROTECTED]>; <[EMAIL PROTECTED]>
> Sent: Monday, September 16, 2002 23:24
> Subject: RE: help with network problem
>
> > Hi, Ticker,
> >
> > Thank you for your email and attention. I did take a look at the MTU
>
> stuff,
>
> > since it is a new stuff for me, and it requires to change the register
>
> file,
>
> > I hesitate to change it now and I will need more time to read the
> > material before I do the changes. I was too busy to do that part. Seems
> > that is the only part that I didn't get a chance to try yet. I will do
> > that maybe late today or tomorrow since the machine is at my home.
> >
> > Since you did that before, I would like to ask you some special questions
> > about the MTU. What is the range of the XXXX number that you use to ping,
> > 1464 and lower? Does that mean 1464 to 1? Should I try 1464 then 1463 and
> > ....to 1 or there is some trick that I can follow?
> >
> > Thank you again and have a nice day!
> >
> >
> > Irene
> >
> >
> >
> > -----Original Message-----
> > From: ticker [mailto:[EMAIL PROTECTED]]
> > Sent: Monday, September 16, 2002 9:12 AM
> > To: Irene; [EMAIL PROTECTED]
> > Subject: Re: help with network problem
> >
> >
> > Hi Irene...
> > Someone mentioned earlier that your MTU might be too big, did you
> > try to change it ? I had same kind of problems earlier and by changing
> > the MTU to a smaller value, I was able to fix this problem.
> >
> > You can determine the MTU by doing:
> >
> > ping -f -l xxxx IP/name of the webserver that you are trying to access.
> > For xxxx, start with 1464 and lower the number until you get a reply.
> > Then add 28 to the highest number at which you get a reply.
> > The result is the MTU that you should change to.
> >
> > /Jani
