Persistent redundant power supply OID

[Salvatore Conte]

Hi

am using Cisco IE4010 dual power switches, version of FW 152-7.E3
I have noticed that on some switches, the OID of the second power supply often changes.
Is there a way to make OIDs persistent?

BR
Thanks

[Flavio Miranda]

Hi

  Initially this does not make sense but I believe in everything. Can you share where are you seeing the OID changing? 

[Salvatore Conte]

The second feed of the screenshot, changes randomly on reboot. It doesn't always happen, but the final value changes .1.3.6.1.4.1.9.9.13.1.5.1.4.1086

[Flavio Miranda]

 This is probably a Bug.  I´d try change the version or call cisco TAC. 

[marce1000]

 - As stated already provide output/example(s) sometimes  indexes/OID's  can be made persistent , but applicable to interfaces only (normally) : 

         https://www.cisco.com/c/en/us/td/docs/switches/lan/catalyst6500/ios/15-0SY/configuration/guide/15_0_sy_swcg/snmp_if_index_persistence.pdf

 M.

[Salvatore Conte]

Hi Marce

Thanks for your feedback.

I have a network of 14 dual power IE4010 switches, firmware version 152-7.E3.
Only on some switches, it happens that by restarting the switch, the OID of the second power supply changes and therefore I lose the SNMP communication (see screenshot)

Before reeboting

After reboot

If you need more information, please ask me

Thanks

Salvatore

[Georg Pauwen]

Hello,

if 'rebooting' can be replaced with 'reseating', the bug below could apply.

IE-4010 Power supply OID change after re-seat
CSCvh01635
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Description
Symptom:
SNMP OID used to access the PS MIB changes whenever they are pulled out and re-seated into the slots
SNMP query from management application might fail after taking out and plugging in the power supply module due to OID change.

Conditions:
Impacts IE-4010 and IE 5000 switches with field replaceable power supply modules installed with IOS version 15.2(6)E1

Workaround:
none

Further Problem Description:
Below example provides an illustration of the problem :

Original state - Both power supplies inserted :

$ snmpwalk -c TEST "IPaddress" 1.3.6.1.2.1.47.1.1.1.1.7.1054
SNMPv2-SMI::mib-2.47.1.1.1.1.7.1054 = STRING: "Power Supply 1"
$ snmpwalk -c TEST "IPaddress" 1.3.6.1.2.1.47.1.1.1.1.7.1092
SNMPv2-SMI::mib-2.47.1.1.1.1.7.1092 = STRING: "Power Supply 2"

After re-seating power supply 2:

$ snmpwalk -c TEST "IPaddress" 1.3.6.1.2.1.47.1.1.1.1.7.1072
SNMPv2-SMI::mib-2.47.1.1.1.1.7.1072 = STRING: "Power Supply 2"

$ snmpwalk -c TEST "IPaddress" 1.3.6.1.2.1.47.1.1.1.1.7.1054
SNMPv2-SMI::mib-2.47.1.1.1.1.7.1054 = STRING: "Power Supply 1"

OID for power supply 2 changed to 1.3.6.1.2.1.47.1.1.1.1.7.1072 which was originally 1.3.6.1.2.1.47.1.1.1.1.7.1092

Known Affected Releases (1 of 1)
15.2(1.0)IEC2

Known Fixed Releases (3 of 3)
15.2(6.1.8i)E2
15.2(6.0.95i)E2
15.2(6)E2