NETGEAR WNR612v2 User Manual page 67

Wireless-N 150 Router WNR612v2 User Manual
MTU setting than the other devices, the data packets must be split or "fragmented" to
accommodate the one with the smallest MTU.
The best MTU setting for NETGEAR equipment is often just the default value, and changing
the value might fix one problem but cause another. Leave MTU unchanged unless one of
these situations occurs:
You have problems connecting to your ISP, or other Internet service, and either the
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technical support of the ISP or of NETGEAR recommends changing the MTU size. These
might require an MTU change:
A secure website that will not open, or displays only part of a Web page
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Yahoo email
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MSN
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America Online's DSL service
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You use VPN and have severe performance problems.
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You used a program to optimize MTU for performance reasons, and now you have
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connectivity or performance problems.
An incorrect MTU setting can cause Internet communication
Note:
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. The following table describes common MTU sizes and
applications.
Table 6. 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.
Chapter 6: Fine-Tuning Your Network | 67