Ip Performance Overview; Enabling The Device To Forward Directed Broadcasts - 3Com MSR 50 Series Configuration Manual

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IP Performance
Overview
Enabling the Device to
Forward Directed
Broadcasts
Enabling the Device to
Forward Directed
Broadcasts
IP P
ERFORMANCE
When configuring IP performance, go to these sections for the information you
are interested in:
"IP Performance Overview" on page 631
■
"Enabling the Device to Forward Directed Broadcasts" on page 631
■
"Configuring TCP Attributes" on page 633
■
"Configuring ICMP to Send Error Packets" on page 636
■
"Displaying and Maintaining IP Performance" on page 638
■
In some network environments, you need to adjust the IP parameters to achieve
best network performance. IP performance configuration includes:

Enabling the device to forward directed broadcasts

■
Configuring the maximum TCP segment size (MSS) of the interface
■
Enabling the SYN Cookie feature and protection against Naptha attack
■
Configuring TCP timers
■
Configuring the TCP buffer size
■
Enabling ICMP error packets sending
■
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. However, you should enable the
feature when:
Using the UDP Helper function to convert broadcasts to unicasts and forward
■
them to a specified server.
Using the Wake on LAN function to forward directed broadcasts to a PC on the
■
remote network.
Follow these steps to enable the device to forward directed broadcasts:
To do...
Enter system view
Enter interface view
C
ONFIGURATION
Use the command...
system-view
interface interface-type
interface-number
Remarks
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