Description: z/OS® V2R1
Communications Server includes the following enhancements for availability:
- Socket establishment time for Netstat ALL/-A - The Netstat
ALL/-A report output is enhanced by adding start date and time information
for TCP connections and UDP endpoints. For TCP connections, the start
date and time indicate the occurrence of the following socket functions
for the TCP socket:
- Bind
- Listen
- Connection establishment
For UDP endpoints, the start date and time indicate the occurrence
of the bind socket function for the UDP socket. The start time information
is useful for performance or problem analysis.
- Sysplex-wide security associations for IPv6 - The support
for IPv6 in a sysplex-wide security association (SWSA) environment
is provided. Sysplex distribution provides better workload balancing
because it performs the following actions:
- Optimally routes new work to the target system and the server
application, based on WLM advice
- Increases the availability of workloads by routing traffic around
failed components
- Increases flexibility by adding additional workload in a nondisruptive
manner
SWSA adds to the sysplex function, distributing the IPSec
cryptographic processing for an IPSec security association (SA) among
systems in a sysplex environment.
SWSA also allows workloads
with IPSec-protected traffic to use the dynamic virtual IP address
(DVIPA) takeover function. You can associate IPSec-protected workloads
with DVIPAs that can be recovered by other systems in the case of
a failure or planned takeover. IPSec SAs are automatically reactivated
on another system in the sysplex when a DVIPA takeover occurs.
- HPR PSRETRY Enhancement - The HPR PSRETRY function is enhanced
with an additional option to enable the immediate path switch of HPR
Rapid Transport Protocol (RTP) pipes. With this option, you can set
large PSRETRY values and still have the benefit of immediate searches
for preferred session paths when a local link is activated or changes
status.
- RPCBIND recycle notification - The rpcbind server is improved
to provide notifications at strategic points in processing and to
enable more effective programming. The rpcbind server sends an ENF
signal when the server is starting and when it is stopping.
- The rpcbind server sends an ENF signal when it has started and
is prepared to accept registrations from RPC applications. If the
rpcbind server is stopped and restarted, RPC applications can monitor
this ENF signal and register again with the rpcbind server.
- The rpcbind server sends an ENF signal when it is stopped or cancelled.
If the rpcbind server is not available to RPC clients, RPC applications
can monitor this ENF signal and take action.
- SNA serviceability enhancements - The following SNA serviceability
enhancements are provided:
- The APPN route selection trace has been enhanced to provide additional
trace entries to diagnose the selection of incorrect routes through
the APPN network for LU-LU sessions and for directed searches that
are used to locate resources. These trace entries are not in the VTAM® internal trace table, but
exist in a separate internal route selection trace table. Activate
the APPN route selection trace in a Network Node (NN).
- The Coupling Facility Services (CFS) component traces connection-related
events in mini-trace tables. You get these traces in the mini-trace
tables even if VTAM Internal
Trace is not running with the CFS option. Each structure has one mini-trace
table, except for the MNPS structure. No action is needed to collect
CFS traces in the mini-trace tables.
- A new CPNAME operand is added to the Display NET,EE command. This
allows you to display all of the active Enterprise Extender connections
to the specified remote CP name.
- TCP/IP serviceability enhancements - The following TCP/IP
serviceability enhancements are provided:
- An additional message for configuration errors encountered during
device or interface activation is being provided. This new message
provides information that easily identifies the reason for the activation
failure.
- The FTP client is enhanced with trace messages to assist with
the diagnosis of problems that occur when opening files. In addition
to the already existing EZA2564W messages documenting a failure, these
trace messages will provide additional information about the root
cause of the failure. These new messages can be accessed by activating
the FTP client's FSC debug option.
- The following OMPROUTE serviceability enhancements are provided:
- Historical time tables are added to OMPROUTE and the TCP/IP stack
to help IBM® Support diagnose
OMPROUTE unresponsiveness problems related to the sysplex monitoring
function.
- A new OMPROUTE message, EZZ8174I, provides additional information
in cases where communication between OMPROUTE and the TCP/IP stack
fails.
- A new OMPROUTE console command that displays the global configuration
options is provided.
- The OMPROUTE_OPTIONS environment variable is ignored. The hello_hi
functionality previously provided by the OMPROUTE_OPTIONS environment
variable is always enabled to optimize processing inbound and outbound
OSPF hello packets so that potential adjacency failures with neighbors
are minimized.
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:
- Socket establishment time for Netstat ALL/-A
- Sysplex-wide security associations for IPv6
- HPR PSRETRY Enhancement
- RPCBIND recycle notification
- SNA serviceability enhancements
- TCP/IP serviceability enhancements