Ethernet

Table of Contents

PAUSE Frame

Introduce the PAUSE frame in Ethernet.

The PAUSE operation is used to inhibit transmission of data frames from another station on the network for a specified period of time.

MAC_CONTROL.request Primitive

  • The 48-bit multicast address 01-80-C2-00-00-01 or unicast MAC address of another station.
  • The PAUSE opcode 16'h00-01.
  • A request_operand indicating the length of time for which it wishes to inhibit data frame transmission.
  • The PAUSE operation cannot be used to inhibit transmission of MAC Control frames.
  • Only supported in full duplex mode .
  • When MAC Control PFC operation has been enabled, MAC Control PAUSE operation shall be disabled.

Frame Format

Refer to MAC control frames format.

Reference

  • 802.3-2022 Annex 31B - MAC Control PAUSE operation
Creation Date: 2023/03/22, Last modified: 2023/09/15, Author: Siyuan Liu

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