[j-nsp] Juniper M20 does not clear "show chassis alarms"/"show system alarms" although problem not present any more

[Martin T]

It looks like if one turns power supply of M20 ON and then OFF(or
vice-versa) in less than 60s, then "show chassis alarms" and "show
system alarms" stay present and only restart of chassisd(or router
reboot) would help. This "After powering off a power supply, wait at
least 60 seconds before turning it back on. After powering on a power
supply, wait at least 60 seconds before turning it off." rule is
described here:
http://www.juniper.net/techpubs/hardware/m20/m20-hwguide/connectingac-power-to-the-router.html

Anyone else encountered this issue? In addition, 60s is rather long time..


2011/1/24 martin <m4rtin86 at gmail.com>:
> Unfortunately this does not clear "show chassis alarms" or "show system alarms".
>
>
> 2011/1/22 Chris Cappuccio <chris at nmedia.net>:
>> remove power supply, reinsert?
>>
>> martin [m4rtin86 at gmail.com] wrote:
>>> Hi,
>>> sorry about cumbersome subject, at least it's informative :) However,
>>> has anyone seen an issue with Juniper M20 where alarms("show chassis
>>> alarms", "show system alarms") do not clear althought problem itself
>>> is not present any more? I have a Juniper M20 router(JUNOS 9.4R4.5),
>>> which has two AC PSU's(740-007311) installed. There were few short
>>> power outages with one power feed(first one ~6min, second one ~6min
>>> and third one ~30min) and finally :
>>>
>>> Jan 19 07:21:11  M20 chassisd[1130]: CHASSISD_SNMP_TRAP6: SNMP trap
>>> generated: Power Supply OK (jnxContentsContainerIndex 2,
>>> jnxContentsL1Index 2, jnxContentsL2Index 0, jnxContentsL3Index 0,
>>> jnxContentsDescr Power Supply B, jnxOperatingState/Temp 2)
>>>
>>>
>>> "Power Supply A" is connected to other power-feed and was not affected
>>> at all. As you can see, according to log, "Power Supply B" is fine.
>>> "DC OK" light of "Power Supply B" is on and "show chassis environment
>>> " output indicates as well, that "Power Supply B" is fine:
>>>
>>> Class Item                           Status     Measurement
>>> Power Power Supply A                 OK
>>>       Power Supply B                 OK
>>>
>>>
>>> According to Juniper
>>> documentation(http://www.juniper.net/techpubs/software/junos/junos73/swcmdref73-basics-services/html/chassis-monitor18.html),
>>> "You cannot clear the alarms for chassis components. Instead, you must
>>> remedy the cause of the alarm. When a chassis alarm is lit, it
>>> indicates that you are running the router in a manner that we do not
>>> recommend."
>>>
>>> However, I still see following output if I execute "show chassis
>>> alarms" or "show system alarms":
>>>
>>> user at M20> show chassis alarms
>>> 2 alarms currently active
>>> Alarm time               Class  Description
>>> 2011-01-19 06:12:44 UTC  Major  Power Supply B not providing power
>>> 2011-01-19 06:13:41 UTC  Major  Power Supply B fan failed
>>>
>>> user at M20>
>>>
>>>
>>> I know, that rebooting the router would help, but what might cause
>>> such issue? Has anybody encountered something similar?
>>> _______________________________________________
>>> juniper-nsp mailing list juniper-nsp at puck.nether.net
>>> https://puck.nether.net/mailman/listinfo/juniper-nsp
>>
>> --
>> Let food be thy medicine and medicine be thy food - Hippocrates
>>
>
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