1-11 IP Performance Optimization ConfigurationWhen optimizing IP performance, go to these sections for information you are interested in:z IP Performance Overviewz Enabling Reception and Forwarding of Directed Broadcasts to a Directly Connected Networkz Configuring TCP Optional Parametersz Configuring ICMP to Send Error Packetsz Displaying and Maintaining IP Performance OptimizationIP Performance OverviewIn some network environments, you can adjust the IP parameters to achieve best network performance.IP performance optimization configuration includes:z Enabling the device to receive and forward directed broadcastsz Configuring TCP timersz Configuring the TCP buffer sizez Enabling ICMP error packets sendingEnabling Reception and Forwarding of Directed Broadcasts to aDirectly Connected NetworkDirected broadcast packets are broadcast on a specific network. In the destination IP address of adirected broadcast, the network ID is a network ID identifies the target network, and the host ID isall-one. If a device is allowed to forward directed broadcasts to a directly connected network, hackersmay mount attacks to the network. Therefore, the device is disabled from receiving and forwardingdirected broadcasts to a directly connected network by default. However, you should enable the featurewhen 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 NetworkIf a device is enabled to receive directed broadcasts, the device will determine whether to forward themaccording to the configuration on the outgoing interface.Follow these steps to enable the device to receive directed broadcasts:To do… Use the command… RemarksEnter system view system-view —Enable the device to receivedirected broadcasts ip forward-broadcastRequiredBy default, the device isdisabled from receivingdirected broadcasts.
