Manage The Mtu Size; Mtu Concepts - NETGEAR D8500 User Manual

AC5300 WiFi VDSL/ADSL Modem Router Model D8500
9. (Optional) Select the Use This Interface ID check box and specify the interface ID to be used for
the IPv6 address of the modem router's LAN interface.
If you do not specify an ID here, the modem router generates one automatically from its MAC
address.
10. (Optional) In the MTU Size (in bytes) field, enter the maximum transmission unit (MTU) for the
IPv6 packets.
By default, the MTU for IPv6 packets is 1480 bytes.
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 maximum
transmission unit (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
- Yahoo email
•
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.
Manage the Internet Settings Manually
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