SPU Switchover, Reseating MIU SPU

Asset ID:	1-72-2195293.1
Update Date:	2017-05-11
Keywords:

Solution Type Problem Resolution Sure

Solution 2195293.1 : SPU Switchover, Reseating MIU SPU

Applies to:

Net-Net 9200 - Version S-D7.2.0 and later
Information in this document applies to any platform.

Symptoms

SPU switchover

Cause

SPU MIU backplane connectivity issues

Solution

In this Document

There have been cases where an SPU switchover happened, without any activity taking place on the SBC. You may see something like the following in the respective log.sm

Oct 3 23:21:43.608 [SMAN] [SM] MIU NMI Event Received
Oct 3 23:21:43.608 [SMAN] SystemManager::processLatchInd(): LATCH IN Event Received for Card MIU0
Oct 3 23:21:43.608 [SMAN] SystemManager::processLatchInd(): SPU Not Master - LATCH IN; Shutdown Bypassed on MIU0
Oct 3 23:21:43.609 [SNR] SNRCore: slot 0 role is OOS
Oct 3 23:21:43.609 [SNR] SNRCore: slot 0 role is OOS
Oct 3 23:21:43.609 [SMAN] RED-UPDATE<RCV>: SPU 0 to SPU 1 - Updating Slot 0 to State: BECOMING OOS Role: OOS Context: -1 Health Score: 100 Start Time: 1443475418
Oct 3 23:21:43.609 [SMAN] RED-UPDATE<RCV>: SPU 0 to SPU 1 - Updating Slot 7 to State: CARD RUNNING Role: OOS Context: -1 Health Score: 100 Start Time: 0
Oct 3 23:21:43.610 [SMAN] RED-UPDATE<RCV>: SPU 0 to SPU 1 - Updating Slot 8 to State: CARD RUNNING Role: ACTIVE Context: -1 Health Score: 100 Start Time: 0
Oct 3 23:21:43.610 [SNR] SNRCore: slot 1 role is ACTIVE PENDING
Oct 3 23:21:43.610 [SNR] SNRCore: slot 1 role is ACTIVE PENDING
Oct 3 23:21:43.610 [SMAN] RED-UPDATE<RCV>: SPU 0 to SPU 1 - Updating Slot 1 to State: BECOMING ACTIVE Role: ACTIVE PENDING Context: -1 Health Score: 100 Start Time: 1443475418
Oct 3 23:21:43.610 [SMAN] RED-UPDATE<RCV>: SPU 0 to SPU 1 - Updating Slot 7 to State: SHUTDOWN Role: OOS Context: -1 Health Score: 100 Start Time: 0
Oct 3 23:21:43.615 [REDUNDANCY] Become Active

After you verify that there was no activity or network issue taking place at the time, it would be wise to re-seat the MIU and SPU cards one the NN9200. The above output indicates that there may be a communication issue between the cards and the backplane. You should try and re-seat the MIU and SPU cards, to verify that both are properly latched on the NN9200. Note that the SPU and MIU cards are treated as a pair connected via a midplane. If the electrical connections between these two cards via the midplane are not well contacted, indeterminate behavior can occur as was seen in this incident. If one card needs to be re-seated, it is a good idea to re-seat both cards as follows:

- when removing: first remove the SPU card, then remove the MIU card
- when inserting: first insert the MIU card, then insert the SPU card

You then need to monitor for any future occurrence, that may indicate a hardware failure.

References

Created from <SR 3-13431189281>

Applies to:

Net-Net 9200
1-914CU

References

<NOTE:1901448.1> - Error Correction Policy for Acme Packet Legacy and Re-Branded Oracle Communications Products

Attachments

This solution has no attachment