Usage Notes - Extreme Networks BlackDiamond 6804 Troubleshooting Manual

Usage Notes

When you configure the
actions:
• All watchdogs and timers are stopped.
• All tasks except the following are suspended:
— tSwFault
— tLogTask
— tSyslogTask
— tShell
— tConsole
— tExtTask
— tExcTask
— The root task
• On BlackDiamond and Alpine switches, the I/O modules are powered down.
• On BlackDiamond switches, the slave MSM is instructed not to monitor the master MSM.
When the
MSM-failover
error occurs, the system requires a system reboot, so the impact to the system is basically the same as
for the
reboot
When the
MSM-failover
occurs, the system does not require a system reboot, so there is no service outage.
When the
reboot
loss of connectivity to all modules. All software tasks are restarted, so any exception error is cleared and
the task restarted. If the task cannot be restarted, the system will fail the POST and will remain in
limited operation mode for further troubleshooting.
When the
shutdown
and held out of service. This option offers administrators the ability to restore the system and reinsert it
back into the network during a scheduled outage window. This might be an advantage if all connected
nodes are dual-homed, as a reinsertion will trigger a network reconvergence and an additional service
outage.
NOTE
Under the
reboot
The only difference between these two options, in this case, is that under the
reinsertion of the system triggers a second network convergence. The impact of the reconvergence
depends on the network topology and configuration (for example, OSPF ECMP versus a large STP
network on a single domain).
Also, if the
system-recovery-level
unpredictable system behavior and—possibly—extensive system outages. Depending on the task that
experiences the exception error, the result might be corrupt routing tables and routing/broadcast loops.
Advanced System Diagnostics and Troubleshooting Guide
option, and a software exception occurs, the system takes these
shutdown
option is configured on a system equipped with MSM-64i modules and an
option.
option is configured on a system equipped with MSM-3 modules and an error
option is configured on a system and an error occurs, the system is rebooted, causing
option is configured on the system and an error occurs, the system is shut down
or options, network redundancy protocols will work to recover the network.
shutdown
condition is set to
Configuring System Recovery Actions
reboot
, the network might become subject to
none
option the
41