D-Link DES-3624 manual Configure Port, Configure Advanced Switch Features screen

Stackable NWay Ethernet Switch User’s Guide

Figure 6-13. Configure Advanced Switch Features screen

The fields you can set are:

♦Port Auto-Partition Capability on All Ports When this function is enabled, if too many consecutive collisions occur on an individual port, the port will be blocked off until a good packet is seen on the wire. If a port is partitioned, the Switch can only transmit data, not receive it.

♦Head Of Line (HOL) Blocking Prevention Enables or disables Head-Of-Line Blocking Prevention. Head-of Line blocking occurs when a packet originating on Port 1, for instance, needs to be forwarded to Ports 2 and 3. If Port 2 is occupied (causing the packet to be held in memory until the port is free), the packet destined for Port 3 will also be delayed, even though the port may be free. Cumulatively, these delays can have a noticeable effect on overall network performance. Enabling HOL Blocking Prevention prevents Head-of-Line blocking from occurring, meaning that the packet destined for Port 3 gets delivered immediately.

Configure Port

The port configuration screen allows you to change the port state in the case when you would like to partition a port due to excessive collision, or for observation, device repair, or security reasons. Great caution, however, must be observed when partitioning a port; you should make sure that the partitioned port is not being used as the port to control or monitor the condition of other devices.

Using the Console Interface 55