CFBMC-2735: Cannot communicate with BMC after firmware upgrade to 13.7

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Category:: ontap-9

Specialty:: HW

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Issue

AFF A400, AFF C400, ASA A400, ASA C400, FAS8300, FAS8700
Upgrading to BMC 13.7
BMC is showing the installed version

Example:
::> system service-processor show
IP       Firmware
Node       Type Status   Configured Version    IP Address
---------- ---- --------- ---------- --------- --------------
node-01     BMC online      true      13.7      172.10.10.10
node-02     BMC online      true      13.7      172.10.10.11
2 entries were displayed.

Ping to BMC IP fails:

user@pc:~$ ping -c 5 node-02-sp PING node-02-sp.fqdn (172.10.10.11) 56(84) bytes of data.
--- node-02-sp.fqdn ping statistics ---
5 packets transmitted, 0 received, 100% packet loss, time 410

SSH to BMC fails:

user@pc:~$ ssh node-02-sp.fqdn;
ssh: connect to host node-02-sp.fqdn port 22:
Connection timed out

The same issue is seen using the backup BMC image:

::> system service-processor reboot-sp -node node-02 -image backup

The issue remains even after reseating the controller.
Attempt to upgrade / reinstall BMC firmware fails due to network inaccessibility

Example when updating from the BMC CLI:

BMC node-01> bmc update http://123.123.123.123/BMC_FW_308-04160_13.10P1.ima
[231117093034][bmc][INFO]URL = http://123.123.123.123/BMC_FW_308-04160_13.10P1.ima
...
rom.ima 100% |*******************************| 32768k 0:00:00 ETA
...
[1704 : 1704 CRITICAL][flashlib.c:2853]public key not found
[1704 : 1704 CRITICAL][flashlib.c:2950]unable to load public key
[1704 : 1704 CRITICAL][utils.c:1475]Encrypted hash of Image and the actual contents of rom.ima does not match
[1704 : 1704 CRITICAL][main.c:400]Error verifying image, VerifyImage failed
[10290 : 10290 CRITICAL][flashlib.c:813]Image verification failed, response status = 28
[0;32;32mVerification error! ...[m
[231117093105][bmc][INFO]Remove /tmp/rom.ima
[1;31mFail to update bmc

SP-MGMT-MLOG-TXT.GZ logs example:

[kern_servprocd:info:6020] 0x8086ff900: 0: ERR: Servprocd::sp_mgmt_user: cpmi_bmc_user_sync: Failed to send the user file to the BMC (-1)

[kern_servprocd:info:6020] 0x8086ff900: 0: ERR: Servprocd::BmcManager: update_bmc_users: Failed to refresh users on the BMC : User configuration error: Failed to send userlist to BMC