Extreme Networks ExtremeWare Command Reference Manual page 2232

Troubleshooting Commands
Table 38: ExtremeWare Task Descriptions (Continued)
Task
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.
Example
The following command displays the show command output on the switch:
top
The output of this command looks similar to the following:
Total number of tasks: 46
Task Name Task Id
==========================================================================
tBGTask 836f18e0
tExcTask 8137ce90
tLogTask 8135e2a0
tSlowTimer 813ccf50
tFastTimer 813ff1f0
2232
Description
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.
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.
Task PC
80748f98
8075ab2c
8075ab2c
8075ab2c
8075ab2c
Status % CPU Max % util
READY 99 99
PEND 0 0
PEND 0 0
PEND 0 0
PEND 0 0
ExtremeWare Software 7.3.0 Command Reference Guide