ATM Configuration and Troubleshooting Guide

Installing and Conﬁguring the ATM Software

Preparing for Conﬁguration

Chapter 2 17

Preparing for Conﬁguration

Before you start conﬁguring your ATM adapter, check that the following

are true:

• The ATM adapter and software are installed (use lanscan as

described in “B” on page 192).

• You have an IP address and subnet mask for every interface that will

be conﬁgured on the ATM adapter. You canconﬁgure one Classical IP

interface and up to 32 emulated LAN interfaces on the same adapter.

• You have superuser rights for the SAM utility.

• The ATM adapter is connected to a correctly conﬁgured and

operational ATM switch or edge device (see your ATM switch

documentation if necessary).

You can conﬁgure the ATM link if the ATM adapter is not connected

to a switch. However, the switch must be up and running and be UNI

3.0, 3.1, or 4.0 compliant to support automatic address recovery.

Recommendations

This section discusses recommendations for the HP-HSC and HP-PCI

buses (discontinued adapters are not shown).

• All buses (HP-HSC and HP-PCI).

— Application-related recommendations:

— For standard applications (for example, ftp, NFS, and

others), if the socket size is conﬁgurable, choose socket size

and message length values of at least 128 Kbytes.

— For a customized application, use the IOCTL SETSOCKOPT to

deﬁne a socket size of at least 128 Kbytes. When possible,

design the application to use the largest size of message

possible (at least 128 Kbytes). Avoid using the NO_DELAY

option of TCP, so that you do not overuse the CPU.

— Network design-related recommendations: