03-Layer 2-LAN Switching Command Reference

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17-Cut-through Layer 2 forwarding commands
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Cut-through Layer 2 forwarding commands

cut-through enable

Use cut-through enable to enable cut-through forwarding.

Use undo cut-through enable to disable cut-through forwarding.

Syntax

cut-through enable

undo cut-through enable

Default

Cut-through forwarding is disabled.

Views

System view

Predefined user roles

network-admin

Usage guidelines

A cut-through forwarding-enabled device forwards a frame after it receives the first 64 bytes of the frame. This feature reduces the transmission time of a frame within the device and enhances forwarding performance.

A frame is forwarded before its CRC field is received, and thus CRC-error frames are forwarded instead of being dropped.

This command does not take effect on the two SFP ports on the back panel of an S6850-56HF or S9850-4C switch.

Examples

# Enable cut-through forwarding on the device.

<Sysname> system-view

[Sysname] cut-through enable