Exadata Ibswitches patching

Imp points:
Starting with release 11.2.3.3.0, the patchmgr utility is used to upgrade and downgrade the InfiniBand switches.
IB Switch patch is delievered with Exadata storage patch.
IB Switch patches are released semi annually to annually.
IB Switch can be patched in Rolling fashion only.


Environment
Exadata Half Rack X4-2
4 Compute nodes, 7 Storage cells and 2 IB Switches
Current IB Switch Version 2.2.7-1



Steps:
1. Identify the number of switches in clusters.

[root@dm01dbadm01 ~]# ibswitches
Switch : 0x002128469b8aa0a0 ports 36 “SUN DCS 36P QDR dm01sw-iba01 10.209.41.246” enhanced port 0 lid 5 lmc 0
Switch : 0x002128469b97a0a0 ports 36 “SUN DCS 36P QDR dm01sw-ibb01 10.209.41.247” enhanced port 0 lid 4 lmc 0


2. Identify the current IB switch software version on all the Switches
[root@dm01db01 patch_18.1.12.0.0.190111]# ssh dm01sw-iba01 version
SUN DCS 36p version: 2.2.7-1
Build time: Aug 4 2017 12:20:53
SP board info:
Manufacturing Date: 2014.05.20
Serial Number: “NCDFxxxxx”
Hardware Revision: 0x0107
Firmware Revision: 0x0000
BIOS version: SUN0R100
BIOS date: 06/22/2010



3. Log in to Exadata Compute node 1 as root user and navigate the Exadata Storage Software staging area

[root@dm01dbadm01 ESS_121220]# cd /u01/app/oracle/software/exa_patches/patch_18.1.12.0.0.190111
[root@dm01dbadm01 patch_18.1.12.0.0.190111]# pwd
/u01/app/oracle/software/exa_patches/patch_18.1.12.0.0.190111

4. Execute the following to perform the IB Switch precheck
[root@dm01db01 patch_18.1.12.0.0.190111]# ./patchmgr -ibswitches ~/ibswitch_group -upgrade -ibswitch_precheck

5. Upgrade the IB Switches using the following command:
[root@dm01db01 patch_18.1.12.0.0.190111]# ./patchmgr -ibswitches ~/ibswitch_group -upgrade


6. Verify that all the IB Switches are upgraded to latest version.
[root@dm01db01 ~]# ssh dm01sw-ibb01 version
SUN DCS 36p version: 2.2.11-2
Build time: Aug 27 2018 11:18:39
SP board info:
Manufacturing Date: 2014.05.19
Serial Number: “NCDFxxxxx”
Hardware Revision: 0x0107
Firmware Revision: 0x0000
BIOS version: SUN0R100
BIOS date: 06/22/2010
[root@dm01db01 ~]#

[root@dm01db01 ~]# ssh dm01sw-iba01 version
SUN DCS 36p version: 2.2.11-2
Build time: Aug 27 2018 11:18:39
SP board info:
Manufacturing Date: 2014.05.20
Serial Number: “NCDFxxxxx”
Hardware Revision: 0x0107
Firmware Revision: 0x0000
BIOS version: SUN0R100
BIOS date: 06/22/2010