Installation guide

will fail. Only DVD–ROM disks that include an ISO-9660 directory

structure are supported in Version 4.0F.

For both CD–ROM media and DVD–ROM media that contains an ISO-9660

directory structure, Compaq recommends use of the -t cdfs option, as

well as the -o noversion or -o rrip option where appropriate. Refer

to mount(8) for a description of these options.

4.4 Network and Communications

The following notes apply to network and communications software.

4.4.1 IP Switching over ATM

The following restrictions apply when using IP switching over ATM:

• Do not use the atmsig command to start UNI signaling on a driver used

for IP switching.

• Automatic startup of IP switching at boot time is not yet supported. For

this release, you must conﬁgure IP switching interfaces in the

/etc/atm.conf ﬁle, and not through the atmsetup utility.

4.4.2 Changes to ATM syslog Messages

In Version 4.0F, many syslog messages for routine ATM events are not

displayed by default. The messages which show the duration of virtual

connections (VC accounting messages) must be explicitly enabled.

The general verbosity of ATM messages can be controlled by setting the

global_message_level parameter associated with the atm module in

the sysconfigtab ﬁle. For example:

sysconfig -r atm global_message_level=2

Values for this parameter are:

• 0 – Normal level. Most routine or transient events are suppressed.

• 1 – Informational level. Adds messages for normal VC release and other

state changes.

• 2 – Verbose level. Provides detailed tracing of most events and state

changes.

Message levels can be set for individual ATM components to tailor the

amount of information displayed. Refer to sys_attrs_atm(5) for more

information.

Base System Software Notes 4–27