Ip Performance Optimization Configuration; Ip Performance Overview; Enabling Reception And Forwarding Of Directed Broadcasts To A Directly Connected Network; Enabling Reception Of Directed Broadcasts To A Directly Connected Network - 3Com 4510G Configuration Manual

11

IP Performance Optimization Configuration

When optimizing IP performance, go to these sections for information you are interested in:

IP Performance Overview

Enabling Reception and Forwarding of Directed Broadcasts to a Directly Connected Network

Configuring TCP Optional Parameters
Configuring ICMP to Send Error Packets
Displaying and Maintaining IP Performance Optimization
IP Performance Overview
In some network environments, you can adjust the IP parameters to achieve best network
performance. IP performance optimization configuration includes:
Enabling the device to receive and forward directed broadcasts
Configuring TCP timers
Configuring the TCP buffer size
Enabling ICMP error packets sending
Enabling Reception and Forwarding of Directed Broadcasts to a
Directly Connected Network
Directed broadcast packets are broadcast on a specific network. In the destination IP address of a
directed broadcast, the network ID is a network ID identifies the target network, and the host ID is
all-one. If a device is allowed to forward directed broadcasts to a directly connected network, hackers
may mount attacks to the network. Therefore, the device is disabled from receiving and forwarding
directed broadcasts to a directly connected network by default. However, you should enable the
feature when using the Wake on LAN function to forward directed broadcasts to a host on the remote
network.

Enabling Reception of Directed Broadcasts to a Directly Connected Network

If a device is enabled to receive directed broadcasts, the device will determine whether to forward
them according to the configuration on the outgoing interface.
Follow these steps to enable the device to receive directed broadcasts:
To do...
Enter system view
Enable the device to receive
directed broadcasts
Use the command...
system-view
ip forward-broadcast
11-1
Remarks
—
Required
By default, the device is
disabled from receiving
directed broadcasts.