View Full Version : Max-MTU DSL/LAN

05-13-00, 02:44 PM
I have a DSL line connected to my LAN. Should I change the Max-MTU setting from 1500? I have heard there is a way of determining the Max-MTU of my ISP?

05-26-00, 11:05 PM
check out the local info on this http://www.speedguide.net/Cable_modems/cable_registry_advanced.shtml

You will probably find that 1500 is too high.

My DSL starts to croak above 1472.

07-20-00, 04:05 PM
At the risk of sounding like an idiot this wasn't much help. I searched for maxmtu in the registry and couldn't find it. Any ideas?

07-27-00, 02:07 AM

i have been using all the info i could find from www.speedguide.net (http://www.speedguide.net) and it has helped me a lot but the one thing i can't figure out is that page "Determining your ISP's MTU"

it gives all these weird examples but i can't figure out how to get it to work
i would appreciate it if you could just tell me what you typed to see that the max mtu was 1472 or whatever you said

i mean an exaxt example

such as


or something like that


07-28-00, 02:09 PM
ping -f -l anynumberbetween 0-1500 www.yourisp.com (http://www.yourisp.com) or yourgatewayIP

I got my max mtu but I dont know where to insert it..