Owner's Manual

genie Advanced Home

N300 Wireless Router JWNR2000v3

- America Online’s DSL service

• Y

ou use VPN and have severe performance problems.

• Y

ou 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. For instance, you might not be able to access certain

websites, frames within websites, secure login pages, or 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

. The following table describes common MTU sizes and

applications.

Table 2. Common MTU sizes

MTU Application

1500 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.

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 email 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. Select ADV

ANCED > Setup > WAN Setup.

The WAN Setup screen displays.

2. In the MTU Size field, enter a value from 64 to 1500.

3. Click Apply.

Your change is saved.