1-11 IP Performance Optimization ConfigurationWhen optimizing IP performance, go to these sections for information you are interested in:z IP Performance Optimization Overviewz Enabling Reception and Forwarding of Directed Broadcasts to a Directly Connected Networkz Configuring TCP Attributesz Configuring ICMP to Send Error Packetsz Displaying and Maintaining IP Performance OptimizationIP Performance Optimization 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 Enabling the SYN Cookie feature and protection against Naptha attacksz 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.Enabling Reception of Directed Broadcasts to a Directly Connected NetworkFollow 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-broadcastOptionalBy default, the device is enabledfrom receiving directed broadcasts.Currently, this command is ineffective on the S5810 series Ethernet switches. That is, the switchescannot be disabled from receiving directed broadcasts.
