TCP/IP Subagent
SNMP Configuration and Management Manual — 424777-006
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Initiating Backup Process Takeover
The Statistics Cache Refresh Timer
The statistics cache or “stats cache” timer controls the rate at which the TCP/IP
Subagent updates values of objects that it retrieves by issuing a SPI STATISTICS
command. Statistical data is relatively volatile. The stats cache timer is initially set with
the -stats startup parameter and can be managed through SNMP by setting the
ztsaStatsCache object.
You can disable the stats cache timer by setting the ztsaStatsCache object to 0. A
value of 0 indicates that the cache is refreshed only when the ztsaRefreshNow object
is set to 1 (forceDynamicRefresh).
Dynamic Refresh
Setting the TCP/IP Subagent private ztsaRefreshNow object to 1 forces a refresh of
the MIB-II irrespective of the refresh timer settings. Once the MIB-II values have been
updated, the value of ztsaRefreshNow returns to 0 (autoDynamicRefresh), and the
values in the refresh timer objects (ztsaInfoCache, ztsaStatusCache, and
ztsaStatsCache) once again determine the rate at which MIB-II values are refreshed.
These objects are described in detail in
Table 8-3, Private (ZTSA) MIB Objects
Supported by the TCP/IP Subagent,
on page 8-21.
Initiating Backup Process Takeover
The TCP/IP Subagent can be run as a process pair to achieve basic fault tolerance.
The support includes a persistent subagent process and checkpointing of the startup
parameters.
To run the TCP/IP Subagent as a process pair and have the backup process take over
in case the primary process fails, include the -b startup parameter when you start the
subagent. For example:
RUN TCPIPSA /NAME $ZTSA, NOWAIT/ -b 6
You can force the backup process to take over and a new backup process to be
created by setting the value of the ztsaSwitchToBackupNow object to 1
(forceBackupTakeover) from an SNMP manager.
Note.
You must specify a backup CPU. Otherwise the TCP/IP Subagent does not run as a
process pair.
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Страница 24: ...Contents SNMP Configuration and Management Manual 424777 006 xxii Tables continued ...
Страница 36: ...About This Manual SNMP Configuration and Management Manual 424777 006 xxxiv Change Bar Notation ...
Страница 38: ...Part I Installing and Configuring SNMP SNMP Configuration and Management Manual 424777 006 ...
Страница 140: ...Part II SCF for the SNMP Agent SNMP Configuration and Management Manual 424777 006 ...
Страница 208: ...Part III Troubleshooting SNMP Configuration and Management Manual 424777 006 ...
Страница 230: ...Part IV SNMP Subagents SNMP Configuration and Management Manual 424777 006 ...
Страница 340: ...TCP IP Subagent SNMP Configuration and Management Manual 424777 006 8 110 Converting Events to Traps ...
Страница 562: ...Trap Multiplexer Subagent Manager SNMP Configuration and Management Manual 424777 006 12 70 Application Source Code ...
Страница 636: ...IPX SPX Subagent G Series SNMP Configuration and Management Manual 424777 006 13 74 1012 ZISA EVT PROCESS TRAPPED ...
Страница 704: ...Part V Appendices SNMP Configuration and Management Manual 424777 006 ...
Страница 778: ...Index SNMP Configuration and Management Manual 424777 006 Index 32 Special Characters ...