NETGEAR RangeMax™ NEXT Wireless Router WNR834B User Manual
•You have problems connecting to your ISP, or other Internet service, and either the technical support of the ISP or of NETGEAR recommends changing MTU. These may require an MTU change:
—A secure Web site that won't open, or only displays part of a Web page
—Yahoo email
—MSN
—America Online's DSL service
•You use VPN and have severe performance problems.
•You used a program to optimize MTU for performance reasons, and now you have connectivity or performance problems..
Note: An incorrect MTU setting can cause Internet communication problems such as the 
inability to access certain Web sites, frames within Web sites, secure login pages,
FTP or POP servers.
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. Table
Table 6-1. Common MTU Sizes
MTU | Application |
|
|
1500 | The largest Ethernet packet size and the default value. This is the typical setting for non- |
| PPPoE, |
| and switches. |
|
|
1492 | Used in PPPoE environments. |
|
|
1472 | Maximum size to use for pinging. (Larger packets are fragmented.) |
|
|
1468 | Used in some DHCP environments. |
|
|
1460 | Usable by AOL if you don't have large email attachments, for example. |
|
|
1436 | Used in PPTP environments or with VPN. |
|
|
1400 | Maximum size for AOL DSL. |
|
|
576 | Typical value to connect to |
|
|
To change the MTU size:
1.In the Advanced section of the main menu, click WAN Setup.
2.Under MTU Size, enter a new size between 64 and 1500.
|
