• A secure website that does not open or displays only part of a web page
• Yahoo email
• MSN portal
• America Online’s DSL service
• You use VPN and experience severe performance problems.
• You used a program to optimize MTU for performance reasons and now you are experiencing
connectivity or performance problems.
If you suspect an MTU problem, a common solution is to change the MTU to 1400. If you are willing to
experiment, you can gradually reduce the MTU from the maximum value of 1500 until the problem goes
away.The following table describes common MTU sizes and applications.
Table 3. Common MTU sizes
ApplicationMTU
The largest Ethernet packet size.This setting is typical for connections that do
not use PPPoE or VPN and is the default value for NETGEAR routers, adapters,
and switches.
1500
Used in PPPoE environments.1492
Maximum size to use for pinging. (Larger packets are fragmented.)1472
Used in some DHCP environments.1468
Usable by AOL if you do not send or receive large email attachments, for example.1460
Used in PPPoA environments.1458
Used in PPTP environments or with VPN.1436
Maximum size for AOL DSL.1400
Change the MTU Size
Warning
An incorrect MTU setting can cause Internet communication problems. For
example, you might not be able to access certain websites, frames within
Specify Your Internet Settings
48
Nighthawk AC1900 Smart WiFi Router Model R6900
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