Correct MTU settings?

[Donovan]

I've recently upgraded to ADSL from iBurst and I was wondering what the correct MTU settings would be? I still have my router set up with the old MTU settings for iBurst and it works fine, but I would obviously like them to be correct.

So what are they?

 

[stocksie]

I use 1492
Stable running

 

[Amida]

I use 1492
Stable running

Yup that's the correct setting. If you use the 1352 that's used by Iburst it will slow down your connection.

 

[Snowolf]

a good guide line is to ping something eg ping www.google.co.za -f -l 1300 if it is ok with no time outs take the value up untill you have time outs, back it up a point or two. record this value. ping something else eg ping www.microsoft.com -f -l 1360 to make sure you are not having time outs.
when you settle on a number that looks like you have no more time outs you add 28 bytes because 20 bytes are reserved for the IP header and 8 bytes must be allocated for the echo request.
eg ping www.mybroadband.co.za -f -l 1400 pinged ok you will use 1400 + 28 so your ideal mtu will be 1428

have fun
please note, ping something that you know replies to pings !!!