I just applied DRAC firmware update 2.52.52.52 on several of my Centos 6.9
systems (R720xd).

I saw several issues in the kernel log, but the most troubling were those
related to the NICs.  The interfaces went down! (messages below)

I don't remember this ever happening with a DRAC firmware update.  Since
when do DRAC firmware updates affect the OS?


2018-04-06T15:49:13.836290+00:00 hostname dsm_ism_srvmgrd[24348]: ISM0007
[iSM@674.10892.2 EventID="8194" EventCategory="Audit" Eve
ntSeverity="warn" IsPastEvent="false" language="en-US"] The iDRAC Service
Module communication with iDRAC has ended.
[...]
2018-04-06T15:51:19.551234+00:00 hostname kernel: igb 0000:01:00.0: em1:
igb: em1 NIC Link is Down
2018-04-06T15:51:21.586203+00:00 hostname kernel: igb 0000:01:00.1: em2:
igb: em2 NIC Link is Down
2018-04-06T15:52:48.318027+00:00 hostname dsm_ism_srvmgrd[24348]: ISM0005
[iSM@674.10892.2 EventID="8196" EventCategory="Audit" EventSeverity="info"
IsPastEvent="false" language="en-US"] The iDRAC Service Module has
successfully restarted communication with iDRAC.
2018-04-06T15:56:24.606193+00:00 hostname kernel: igb 0000:01:00.0: em1:
igb: em1 NIC Link is Up 1000 Mbps Full Duplex, Flow Control: RX
2018-04-06T15:56:25.430199+00:00 hostname kernel: igb 0000:01:00.0: em1:
igb: em1 NIC Link is Down
2018-04-06T15:56:26.331188+00:00 hostname kernel: igb 0000:01:00.1: em2:
igb: em2 NIC Link is Up 1000 Mbps Full Duplex, Flow Control: RX
2018-04-06T16:01:30.126191+00:00 hostname kernel: igb 0000:01:00.0: em1:
igb: em1 NIC Link is Up 1000 Mbps Full Duplex, Flow Control: RX
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