Changing Fiber Channel Switching Mode - Reboot Behavior

[Runner888]

Hi All,

Quick question: I'm currently running UCS v3.2.3 and may need to reconfigure the fiber channel switching mode. According to the UCS doc (https://www.cisco.com/c/en/us/td/docs/unified_computing/ucs/ucs-manager/GUI-User-Guides/Network-Mgmt/3-2/b_UCSM_Network_Mgmt_Guide_3_2/b_UCSM_Network_Mgmt_Guide_3_2_chapter_010.html#concept_66674E79D04044E8A470B91EDEFA417F), it states that the FIs will reboot sequentially (secondary FI reboots first and then primary FI) for v3.1.3 and later when making such a change. However, it later states that both FIs will reboot simultaneously under "Note" section. It's a bit confusing here. Can anyone provide insights into the actual reboot behavior for v3.2 or later? Thanks.

Keith

Keith

[mojafri · Accepted solution]

Hi Keith,

For UCS Manager Release 3.1(3) and above we included user-ack before primary FI reboot. So yes, its in rolling fashion. Tested in lab as well. 

I'll file a doc bug to remove that note. It is confusing.!! 

Please rate if you find it helpful. 

Regards,

MJ

[Runner888]

Thanks MJ for the clarification as well as for the filing doc revision to remove that note. Just out of curiosity here, do the FIs also do a rolling reboot if you change the switching for Ethernet? I would assume that regardless of whether it is Ethernet or Fiber Channel--if one makes a change to the switching mode, the FI will reboot sequentially for v3.1.3 or later. I would assume that would be the case but don't want to make such assumptions.

Keith

[mojafri]

you are absolutely correct !! 

Regards,

MJ