H3C Technologies H3C S7500E Series Switches - Manual (Page 110)

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IP Performance Optimization Configuration
When optimizing IP performance, go to these sections for information you are interested in:
z IP Performance Optimization Overview
z Enabling Reception and Forwarding of Directed Broadcasts to a Directly Connected Network
z Configuring TCP Attributes
z Configuring ICMP to Send Error Packets
z Displaying and Maintaining IP Performance Optimization
The S7500E Series Ethernet Switches are distributed devices supporting Intelligent Resilient
Framework (IRF). Two S7500E series can be connected together to form a distributed IRF device. If
an S7500E series is not in any IRF, it operates as a distributed device; if the S7500E series is in an
IRF, it operates as a distributed IRF device. For introduction of IRF, refer to IRF Configuration in the
IRF Configuration Guide.
IP Performance Optimization Overview
In 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 broadcasts
z Configuring TCP timers
z Configuring the TCP buffer size
z 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. 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.