Switching Features; Flow Control Support (Ieee 802.3X); Head Of Line Blocking Prevention; Alternate Store And Forward (Asf) - Dell PowerEdge M420 Configuration Manual

Dell powerconnect m8024-k user's configuration guide

Hide thumbs Also See for PowerEdge M420:

Table of Contents

Switching Features

Flow control enables lower speed switches to communicate with higher speed

switches by requesting that the higher speed switch refrains from sending

packets. Transmissions are temporarily halted to prevent buffer overflows.

For information about configuring flow control, see "Configuring Port-Based

Traffic Control" on page 691.

Head of Line (HOL) blocking prevention prevents traffic delays and frame

loss caused by traffic competing for the same egress port resources. HOL

blocking queues packets, and the packets at the head of the queue are

forwarded before packets at the end of the queue.

The Alternate Store and Forward (ASF) feature reduces latency for large

packets. When ASF is enabled, the memory management unit (MMU) can

forward a packet to the egress port before it has been entirely received on the

Cell Buffer Pool (CBP) memory.

AFS, which is also known as cut-through mode, is configurable through the

command-line interface. For information about how to configure the AFS

CLI Reference Guide

feature, see the

available at support.dell.com/manuals.

Jumbo frames enable transporting data in fewer frames to ensure less

overhead, lower processing time, and fewer interrupts.

For information about configuring the port MTU, see "Configuring Port

Characteristics" on page 491.

Your switch supports auto-detection between crossed and straight-through

cables. Media-Dependent Interface (MDI) is the standard wiring for end

stations, and the standard wiring for hubs and switches is known as Media-

Dependent Interface with Crossover (MDIX).

Switch Features