These release notes support V4.5.1 of the ptx®/ITX software intended for use with IBM® NUMA-Q® systems. Read this document (including the additional information at the end) before you install and run this release of the ptx/ITX software.
ATTENTION ptx/ITX supports Public Data Networks (PDNs). It does not support the Defense Data Network (DDN) Standard service.
The following software products are prerequisites for the ptx/ITX V4.5.1 software product:
ptx/ITX V4.5.1 does not contain new features. This release is compatible with threads but does not use threads.
To install ptx/ITX V4.5.1, refer to the DYNIX/ptx V4.6.0 and Layered Products Software Installation Release Notes.
The ptx/ITX Administration Guide describes the configuration procedures for configuring an ITX interface.
If you encounter problems while booting ptx/ITX, you should examine the etc/net_conf/itxd.run file.
The following documentation is available on the online documentation CD or at http://webdocs.sequent.com/:
ptx/ITX Administration Guide
This section describes the known problems in the ptx/ITX software. The number that appears in parentheses in the title of each problem is the problem-tracking-system number assigned to the report.
The following bugs were fixed in this release:
248499 - TOC file does not need sync.
249368 - chroot commands during install core dumping.
253219 - PANIC: apic_p_lock: timeout!
There are no open problems in this release.
The parameter ANONYMOUS is a kernel configuration parameter that specifies whether anonymous connections (those with no calling address) are allowed. If it is set to 1, any call request without a calling address is accepted. The default is 1. Therefore, call requests with no calling addresses are accepted.
Refer to Chapter 3 for the ptx/ITX Administration Guide for information on how to change the value of this parameter.
The configuration of ptx/ITX to use two X.25 lines in an external loopback (out one port and back in another on a sync card) is not supported.
Although TCP/IP supports dynamic address changes for attached interfaces, this feature does not apply to ITX interfaces. If you are changing the IP address of an ITX interface, you have to bring down itxd (the ITX daemon) for the change to take effect.
Note also that IP address aliasing is not supported for ITX interfaces.
ptx/ITX maintains two queues for each logical channel. The messages from TCP/IP are stored in these two queues until X.25 is ready to transmit. If the number of packets being queued for transmission reaches the queue limit, ITX starts dropping packets. Therefore, you will see many UDP packets getting dropped if the rate of transmission is high.
The files /var/tcp/ifnets, /var/tcp/ifaddrs, and /var/tcp/routetab contain configuration information used by ptx/ITX and ptx/TCP/IP. Since these files are supplied by ptx/TCP/IP software, you will need to save the ptx/ITX information in these files before you remove ptx/TCP/IP.
If you are using a manufacturing kernel, ptx/ITX prints debug messages to ktlog and eeslog during boot and shutdown. This may fill the /usr file system.
Workaround: Shutting down rpc.rstatd and mib2agt should eliminate the noise from ptx/ITX.