3Com WX3000 IP Performance Configuration, IP Performance Overview, Configuring IP Performance

2 IP Performance Configuration

IP Performance Overview

Introduction to IP Performance Configuration

In some network environments, you need to adjust the IP parameters to achieve best network performance. The IP performance configuration supported by the device includes:

zConfiguring TCP attributes

zDisabling sending of ICMP error packets

Introduction to FIB

Every device stores a forwarding information base (FIB). FIB is used to store the forwarding information of the device and guide Layer 3 packet forwarding.

You can know the forwarding information of the device through the FIB table. Each FIB entry includes: destination address/mask length, next hop, current flag, timestamp, and outbound interface.

When the device is running normally, the contents of the FIB and the routing table are the same.

Configuring IP Performance

Configuration Task List

Complete the following tasks to configure IP performance:

Task	Remarks
Configuring TCP Attributes	Optional
Disabling Sending of ICMP Error Packets	Optional

Configuring TCP Attributes

TCP optional parameters that can be configured include:

zsynwait timer: When sending a SYN packet, TCP starts the synwait timer. If no response packets are received before the synwait timer times out, the TCP connection is not successfully created.

zfinwait timer: When the TCP connection is changed into FIN_WAIT_2 state, finwait timer will be started. If no FIN packets are received within the timer timeout, the TCP connection will be terminated. If FIN packets are received, the TCP connection state changes to TIME_WAIT. If non-FIN packets are received, the system restarts the timer from receiving the last non-FIN packet. The connection is broken after the timer expires.

zSize of TCP receive/send buffer

Follow these steps to configure TCP attributes:

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