Cabletron Systems T2015 Guía de instalación descargar pdf (Pagina 355)

Appendix C TCP/IP Protocol 345

⇔ To make the network run faster or use less memory

1. Be sure Microsoft TCP/IP is properly installed on the computer being

tuned.

2. Make a backup copy of the PROTOCOL.INI file.

3. Edit PROTOCOL.INI on the computer to be tuned. Change the

values for one or more of the following entries, depending on what

you want to accomplish:

Note

If you are using a 3C501 adapter (also known as an Etherlink

adapter), we recommend that you set tcpwindowsize and

tcpsegmentsize to 1024. On this adapter the default values could

seriously degrade performance.

tcpconnections

Specifies the maximum number of TCP connections for the

computer. This value should not be specified. Instead, allow it to

be calculated by the software.

tcpwindowsize

Specifies the maximum amount of data (in bytes) that can be

accepted by the computer in a single transaction. The value

depends on the number of tcpconnections and the network

adapter. The minimum size is 512 bytes. To conserve memory,

keep the window size less than or equal to 4350. The default is

1450 bytes for MS-DOS, or 4350 bytes for OS/2.

For best performance, LAN Manager chooses a default window

size that is a multiple of tcpsegmentsize. The suggested multiple is

3 or 4, depending on whether tcpsegmentsize is 1450 or 1024,

respectively. For maximum memory conservation, set

tcpwindowsize to 1024.

However, if you use a 3Com EtherLink card (3C501) instead of an

EtherLink II card, be sure to set the window size equal to the

segment size for all applications. Window and segment sizes must

both be equal to either 1024 or 1450. Otherwise, performance can

be seriously degraded.

tcpsegmentsize

Specifies the maximum amount of data (in bytes) that can be sent

by the computer in a single packet. The value depends on the

number of tcpconnections. The default that LAN Manager sets

for tcpsegmentsize is near optimal. Modifying this parameter will

not generally enhance performance. The default is 1450 bytes for

either MS-DOS or OS/2.

4. Save PROTOCOL.INI as an ASCII text file, and exit the editor.

5. Reboot the computer so the changes can take effect.

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