Extreme Networks ExtremeWare Command Reference Manual page 2230

Troubleshooting Commands
Table 38: ExtremeWare Task Descriptions
Task
httpd
Logpoll
mportTask
pifstate
tAsyncSave
tbgpTask
tbgpTimerTask
tBgQosMon
tBGTask
tCardTask
tChecksumPoll
tConsole
tdiagTask
tDvmrpTask
tEapsTask
tEdpTask
tEsrpTask
tExcTask
tFastTimer
tfdbAgeTask
tIpxTask
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Description
The HTTP daemon task manages the HTTP web management interface on the
system.
In an active dual CPU system, the master CPU will initiate the log polling task
(Logpoll) to periodically poll the secondary or slave CPU(s). This process clears the
individual syslogs and consolidates them onto the master CPU switch log.
The management port task.
The port interface state task (pifstate) processes port link state changes. It is
watchdog timer poll driven as opposed to interrupt driven by hardware events.
The tAsyncSave tasks the NVRAM asynchronous save/write processing task. This
process manages the save or writes to the NVRAM.
The border gateway protocol task (tbgpTask) implements and processes BGP on the
switch.
The BGP internal process timer task (tbgpTimerTask) manages the internal BGP
timer delays for checking BGP networks and next hops.
The background Quality of Service monitor task (tBgQosMon) is a background
version of the QoS monitoring task that monitors transmit count and kill count of
ports and cycles as long as the monitor is enabled.
The background task (tBGTask) is the core task switching process. It receives
packets from the hardware ASICs and switches them to the appropriate functional
task to process that packet type or group. The tBGTask typically runs with a high
CPU utilization (90% or greater). It is constantly checking for packets to be sent up
by the hardware ASICs. It only releases control of the CPU if packets are sent to the
switch or if timer functions signal another task to become active.
The I/O card event task (tCardTask) manages the event signaling hardware and
state machine for the I/O cards in a chassis-based system.
The checksum polling task (tChecksumPoll) periodically polls the boards for fabric
checksum errors.
The console task.
The diagnostic task (tdiagTask) executes the diagnostic routines for the particular
hardware platform.
The distance vector multicast routing protocol task (tDvmrpTask) implements and
processes DVMRP on the switch.
The Ethernet automatic protection switching task implements and processes EAPS
on the switch.
The Extreme Discovery Protocol task (tEdpTask) implements and processes the EDP
neighbor discovery process.
The Extreme Standby Router Protocol (tEsrpTask) implements and processes ESRP
on the switch.
If the operating system recognizes an exception condition, it will invoke the exception
handling task (tExcTask).
The fast timer task (tFastTimer) is used to maintain a queue of timer events
triggering periodic or single event functions. These events have a small delay in time
between re-occurrences. The tFastTimer has a higher priority than the slow timer
task (tSlowTimer). Therefore, tFastTimer events are processed prior to iSlowTimer
events occurring at the same time.
The forwarding database aging task (tfdbAgeTask) performs the aging of MAC FDB
entries in the hardware and software tables.
The IPX input task (tIpxTask) handles inbound IPX control packets such as RIP,
SAP, and Xping.
ExtremeWare Software 7.3.0 Command Reference Guide