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R
ELEASE
N
OTE
FOR
THE
3C975 ATML
INK
155 PCI N
ETWORK
I
NTERFACE
C
ARD
Compaq ProLiant 1500 Computer
A Compaq ProLiant 1500 computer running
Windows NT 3.51 with one or multiple ATMLink NICs
may hang under heavy loading if the system is not
updated to the latest HAL, BIOS, and ECU from Compaq.
The latest versions are available from the Compaq Web site
at http://www.compaq.com/support/files/server/softpaqs/
WINNT/NTSSD.html.
Tyan Computer Systems
3Com has observed that in some Tyan servers, the
first and last PCI slots share the same interrupt. Under
Windows NT 3.51 with Service Pack 5 installed, a video
card that occupies one of these slots cannot coexist with
an ATMLink NIC occupying the other. Move the video card
from the first or last PCI slot if you require either slot for an
ATMLink NIC.
ATM Switch Considerations
Busy Switch Symptoms
When you start or reboot the system, the ATMLink NIC
driver may not join all of its associated ELANs. The ATMLink
utility may report that the initialization failed or that the
ELAN is down. These conditions can be caused by a busy
ATM switch or improperly configured ELANs.
An ATM switch can be busy in two ways:
■
When a large number of ELANs are initialized at
the same time, the ATMLink driver may time out before
the ATM switch can fulfill all the ELAN service requests.
■
A switch can run short of resources (such as VPI/VCI)
needed to fulfill LEC service requests.
If a switch lacks resources, it cannot establish a virtual
circuit for the ELAN. This failure can occur when a large
number of ELANs are configured for the server.
Use the ATMLink utility to reset an individual ELAN
if it is configured correctly but still does not become
operational. Resetting an individual ELAN is a new
feature in the version 1.5 release of the ATMLink utility.