Extreme Networks ExtremeWare Command Reference Manual page 1285

Table 22: ExtremeWare Task Descriptions (Continued)
Task
tPimTask
tPingServer
tPortProbe
tPortUtilization
tRip
tRipTimer
TRmonTask
tRRPoll
tRxMsgTask
tServAlive
tShell
tSlbFailover
tSlowTimer
tsmartTrap
tSnmpd
tSntpc
tsshshell
tStatsPoll
tstpTask
tSwFault
tsyslogTask
tTimeout
tTRRecv
tvrrpTask
Investigate tasks that, for no apparent reason, show CPU utilization consistently above 25% (except for
the BGTask). Configure the appropriate debug-trace command and look for messages indicating a
problem. Common problems are source or destination addresses.
ExtremeWare 7.7 Command Reference Guide
Description
The protocol independent multicast task (tPimTask) implements and processes PIM on the
switch.
NOTE: This option is available only on the "i" series switches.
The server load balancing (SLB) Layer 3 ping health check sub-task.
NOTE: This option is available only on the "i" series switches.
A server load balancing (SLB) Layer 4/Layer 7 health check sub-task.
NOTE: This option is available only on the "i" series switches.
The port utilization data collection task (tPortUtilization) is a 30 second task that pulls physical
port data statistics from the hardware and updates the software database tables.
The Routing Information Protocol task (tRip) implements and processes RIP on the switch.
The RIP timer task (tRipTimer) manages the internal timer trigger functions and delays for RIP.
The remote monitoring task
The Road Runner poll task (tRRPoll) pulls the MAC and PHY layer statistics from the store in
the software based tables.
The receive message task (tRxMsgTask) is located on the secondary system. ExtremeWare 6.2
commences use of the secondary CPU in BlackDiamond switches. This is the secondary slave
CPU inter-CPU receive task.
The server load balancing (SLB) health check server task.
NOTE: This option is available only on the "i" series switches.
The core operating system internal shell process (tShell) is spawned whenever the internal
shell is accessed.
The server load balancing failover task.
The slow timer task (tSlowTimer) maintains a queue of timer events triggering periodic or single
event functions. Typically these events have a large period gap in terms of time between
recurrences.
Extreme smart trap task.
The SNMP daemon task manages all SNMP processing on the system.
The simple network time protocol client task (tSntpc) implements the SNTP client function and
processing.
The secure shell (SSH) task.
The port interface statistics poll task (tStatsPoll) polls the port interfaces for statistic counters.
The Spanning Tree protocol task (tstpTask) implements the STP algorithm and processing.
The software fault handler task (tSwFault) will perform a stack dump for any task that has
crashed.
The system log task (tsyslogTask) receives messages/text from other tasks and asynchronously
logs these to the switch NVRAM log area.
The Timeout task (tTimeout) is used to manage and execute various functions on timeouts.
The trace route receiver task (tTrRecv) is spawned dynamically when the trace route utility is
used.
The virtual router redundancy protocol task (tvrrpTask) implements and processes VRRP on the
switch.
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