NETGEAR WGR614 v8 manual Common MTU Sizes

54 Mbps Wireless Router WGR614v8 User Manual

•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, or FTP or POP servers.

If you suspect an MTU problem, a common solution is to change the MTU size to 1400. If you are willing to experiment, you can gradually reduce the MTU size from the maximum value of 1500 until the problem goes away. Table 5-1describes common MTU sizes and applications.

Table 5-1. Common MTU Sizes

MTU	Application
1500	The largest Ethernet packet size and the default value. This is the typical setting for non-
	PPPoE, non-VPN connections, and is the default value for NETGEAR routers, adapters,
	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 do not have large e-mail attachments, for example.
1436	Used in PPTP environments or with VPN.
1400	Maximum size for AOL DSL.
576	Typical value to connect to dial-up ISPs.

To change the MTU size:

1.In the main menu, under Advanced, select WAN Setup.

2.In the MTU Size field, enter a new size between 64 and 1500.

3.Click Apply to save the new configuration.

Fine-Tuning Your Network 5-21

v1.1, May 2008