Description: z/OS® V2R1
Communications Server includes the following enhancements for simplification:
- Configuration Assistant performance improvements and enhanced
user interface - Configuration Assistant supports a new Web 2.0
design model on z/OSMF. This provides the following improvements to
performance and user experience:
- A redesigned user interface that provides an integrated experience
with other z/OSMF applications
- Improved performance that reduces the server-side processing on z/OS
- Improve translation of special characters in linemode for TSO/VTAM -
TSO/VTAM provides the ability to translate Extended English characters
for the TPUT macro instruction with the EDIT parameter. For more information
about the Extended English translation, see D/T3174 Character
Set Reference.
This function provides the following options
for the TPUT EDIT translation for terminals that support the Extended
English character set:
- Base English translation
- No translation
- Extended English translation
In previous releases, TSO/VTAM translated the Extended
English characters of the TPUT EDIT to colons. The colons were then
sent to terminals that supported the Extended English character set
(Coded Graphic Set Global Identifier (CGCSGID) of X'02B90025').
- Resolver initialization resiliency - The system resolver
starts regardless of the following conditions:
- The resolver detects one or more errors with the statements in
the resolver setup file.
- The resolver setup file does not exist or cannot be accessed by
the resolver.
- One or more files that are specified as values on the resolver
setup statements, such as GLOBALTCPIPDATA, do not exist or cannot
be accessed by the resolver.
The resiliency of the resolver initialization allows your
TCP/IP stacks and other applications that are dependent on resolver
processing to continue their initialization despite any resolver setup
file errors.
- Enterprise Extender IPv6 address configuration - Your ability
to configure your IPv6 EE connections is enhanced by allowing you
to specify an IPv6 address instead of a hostname. You can specify
IPADDR as any of the following items:
- A VTAM® start option
- A parameter on the GROUP statement in an XCA major node
- A parameter on the PATH statement in a switched major node
- Simplified configuration for progressive mode ARB - The
configuration of the progressive-mode adaptive rate-based (ARB) flow
control algorithm on predefined EE Physical Units (PUs) is simplified.
This flow control algorithm improves the performance in virtualized
or CPU-constrained environments. You can configure HPREEARB on the
GROUP definition statement in the switched major node for predefined
EE (Enterprise Extender) connections. As usual, you can also specify
the HPREEARB parameter on the following items:
- The PU definition statement in the switched or model (DYNTYPE=EE)
major nodes
- The connection network GROUP definition statements in the EE XCA
major node
- Check TCP/IP profile syntax without applying configuration
changes - The availability of TCP/IP is improved by providing
a method to check the syntax of TCPIP profile statements in an initial
profile or in the profile data set that is specified on a VARY TCPIP,,OBEYFILE
command without activating the profile.
With the VARY TCPIP,,SYNTAXCHECK
command, you can check the syntax of configuration statements in profile
data sets before using the statements to configure TCP/IP.
You
do not need to issue the command on the system that will apply the
profile; you can check the profile on any system that supports the
VARY TCPIP,,SYNTAXCHECK command. For example, you can specify a TCP/IP
stack on this command that is configured to support only IPv4 to check
a profile that contains IPv6 profile statements.
- User control of Ephemeral Port Ranges - The new TCP/IP
profile configuration options allow you to specify the ephemeral port
range for use by TCP sockets, UDP sockets, or both. Previously, ephemeral
ports were assigned from the range 1024 - 65535. To facilitate port
controls on firewalls, you can specify a subset of the 1024 - 65535
range for use as ephemeral ports.
- IPv4 INTERFACE statement for HiperSockets™ and Static VIPAs -
You can use the INTERFACE statement in the TCP/IP profile to configure
IPv4 interfaces for HiperSockets and
static VIPAs. This enhancement has the following benefits:
- Simplifies IPv4 configuration for HiperSockets and static VIPA by supporting
an INTERFACE statement to replace the DEVICE/LINK/HOME statements.
- Provides a more straightforward way of configuring the source
VIPA for IPv4 HiperSockets interfaces.
- Allows you to configure multiple VLANs from the same TCP/IP stack
for a single HiperSockets CHPID
for both IPv4 and IPv6.
- IBM® Health Checker for z/OS GATEWAY statement check -
A new z/OS Health Checker for z/OS migration health check is
provided to help determine whether you are using the GATEWAY configuration
statement in your TCP/IP profile. Support for the GATEWAY statement
will be removed in a future z/OS release.
If the GATEWAY statement is processed, a warning message EZZ0717I
is issued.
- IBM Health
Checker for z/OS legacy device
types - With TCP/IP APAR PI12981 and SNA APAR OA44671, a new migration
health check is provided to use with the IBM Health
Checker for z/OS function.
The new migration health check determines whether you are using legacy
device type configuration statements in your TCP/IP profile.
Support
for the DEVICE and LINK profile statements for the following TCP/IP
legacy device types will be eliminated in a future release of IBM z/OS Communications
Server:
- ATM
- CDLC
- CLAW
- HYPERchannel
- SNALINK (LU0 and LU6.2)
- X.25
Because support will be eliminated for the ATM device type, the
following associated TCP/IP profile statements will no longer be supported:
When the TCP/IP stack processes a legacy device type profile
statement, it issues message EZZ0717I. See this message, and the associated
profile processing messages, for information on the profile data set
that contains the statements.
- CSSMTP mail message date header handling option - You can
configure the Communications Server Simple Mail Transfer Protocol
(CSSMTP) to not add the Date header to the mail message when one was
not explicitly specified.
When change was introduced: z/OS V2R1
Reference information: See the following topics in
z/OS V2R1.0 Communications Server: New Function Summary for
detailed descriptions that include any applicable restrictions, dependencies,
and steps on using the functions:
- Configuration Assistant performance improvements and enhanced
user interface
- Improve translation of special characters in linemode for
TSO/VTAM
- Resolver initialization resiliency
- Enterprise Extender IPv6 address configuration
- Simplified configuration for progressive mode ARB
- Check TCP/IP profile syntax without applying configuration
changes
- User control of Ephemeral Port Ranges
- IPv4 INTERFACE statement for HiperSockets and Static VIPAs
- IBM Health Checker
for z/OS GATEWAY statement
check
- IBM Health
Checker for z/OS legacy device
types
- CSSMTP mail message date header handling option