H3C Technologies H3C WX6000 Series Access Controllers - Manual (Page 94)

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11
IP Performance Configuration
When configuring IP performance, go to these sections for information you are interested in:
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IP Performance Overview
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Enabling Reception and Forwarding of Directed Broadcasts to a Directly Connected Network
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Configuring TCP Attributes
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Configuring ICMP to Send Error Packets
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Displaying and Maintaining IP Performance
IP Performance Overview
In some network environments, you need to adjust the IP parameters to achieve best network
performance. IP performance configuration includes:
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Enabling the device to receive and forward directed broadcasts
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Configuring the maximum TCP segment size (MSS) of the interface
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Configuring TCP timers
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Configuring the TCP buffer size
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Enabling ICMP error packets sending
Enabling Reception and Forwarding of Directed Broadcasts to a
Directly Connected Network
Directed broadcasts refer to broadcast packets sent to a specific network. In the destination IP address
of a directed broadcast, the network ID is a network-specific number and the host ID is all ones.
Enabling the device to receive and forward directed broadcasts to a directly connected network will give
hackers an opportunity to attack the network. Therefore, the device is disabled from receiving and
forwarding directed broadcasts by default. You should however enable the feature when:
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Using the UDP Helper function to convert broadcasts to unicasts and forward them to a specified
server.
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Using the Wake on LAN function to forward directed broadcasts to a PC 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.