Should all of my machines use the same MTU/IPMTU? Tweaking FAQ

This Section

Max MTU: How do I find mine?
MTU: How high can/should mine be?
MTU: Setting it with RASPPPoE
MTU: Setting it with WINPOET v2+, Win98/98se/ME
MTU: Setting it with Enternet, Win95/98/98se/ME/2K/XP
MTU: Setting it for non PPPoE users and PPPoA.
Netgear RT-311/314, RP114, ZyXEL P310/314 routers: How do I raise its MTU?
Linksys router: How do I raise its MTU?
SMC or AMIT router: How do I raise its MTU?
Should all of my machines use the same MTU/IPMTU?
MSS: What is it?
Raising MTU from 1480 with WinXP, using *built in* PPPoE connection software.
MTU: How do I raise/lower mine?
Dial Up (RAS) MTU: What is it?
Setting MTU on Virtual Private Network PPTP
Netgear RP614v.1 routers: How do I raise its MTU?
MTU: What is the highest and most optimal MTU for AOL connections (USA)?
MTU: Changing it in AOL 6.0 (Win9x/ME)

Should all of my machines use the same MTU/IPMTU?

Yes, they should. If you use a router/hub to connect multiple PCs, then they should all be set to the same MTU. Whether that is 1492 or 1500 will depend on your connection and software.

Some PPPoE software, like Enternet (not Ethernet) and WinPoet, will not allow for higher than 1454 IPMTU. This, then, would be the number that all PCs will use.

If you use ICS (MSFT's Internet Connection Sharing software), then it is important to set ICS MTU for each PC to match that of the other machines as well. This can be done using DRTCP from the Tweaks Forums "Links."

got feedback?

Please address these issues: If I want my MTU to be 1500, do I set it to 1500 or 1472 in DrTCP? No matter what I set MTU to in DrTCP, Tweak Test returns "Change MTU to 1500".

2008-03-04 05:55:11

by Pinan edited by JMGullett
last modified: 2007-02-21 16:18:19

All FAQs » Tweaking FAQ » 4. MTU

Should all of my machines use the same MTU/IPMTU?