Enabling Use of RFC 2460 MTU

To comply with RFC 2460, TCP/IP uses a maximum transmission unit (MTU) of 1280. This is used to avoid fragmentation of a datagram by intermediate gateways along the path.

This option is available on systems using MCP v3 Networking and is disabled by default. The default MTU size is the size configured for your interface. Typically, the MTU size on a system running MCP v3 Networking is 1500.

You can use the TCP/IP Option command with the USE1280MTU option to enable use of RFC 2460 MTU. If you want a larger MTU, do not enable this option. If both the USE1280MTU and USERFCMTU options are enabled, USERFCMTU takes precedence.

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