Netgear AC1600 User Manual download pdf (Page 88)

Manage the Internet Settings Manually

AC1600 WiFi VDSL/ADSL Modem Router Model D6400

10. To specify the interface ID for the IPv6 address of the modem router’s LAN interface, select

the Use This Interface ID check box, and enter the interface ID.

If you do not specify an ID here, the modem router generates one automatically from its

MAC address.

11. Click the Apply button.

Your settings are saved.

Manage the MTU Size

The maximum transmission unit (MTU) is the largest data packet a network device transmits.

MTU Concepts

When one network device communicates across the Internet with another, the data packets

travel through many devices along the way. If a device in the data path uses a lower MTU

setting than the other devices, the data packets must be split or “fragmented” to

accommodate the device with the smallest MTU.

The best MTU setting for NETGEAR equipment is often the default value. In some situations,

changing the value fixes one problem but causes another.

Leave the MTU unchanged unless one of these situations occurs:

• You experience problems connecting to your ISP or other Internet service, and the

technical support of either the ISP or NETGEAR recommends changing the MTU setting.

These web-based applications might require an MTU change:

- A secure website that does not open or displays only part of a web page

- Y

ahoo 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.

1 2 ... 83 84 85 86 87 88 89 90 91 92 93 ... 291 292

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Netgear AC1600 User Manual Page 88