Flex-10/10D: bay1-2 stacking links degraded

[pmehta2]

Greetings. I am a newbie to HP C7K. I have the following configuration:

1. Single HP C7K. With six BL460c blades. In bay 1-3 and bay 9-11.

2. VC Flex-10/10D in bay 1 & 2. VC1 has 2 ports in LAG to switch 1 and VC2 has 2 in LAG to switch 2.

I sometimes see that "Domain Status" indicates that "Stacking Links" degraded. Trying to narrow it down. I have three probable candidates:

1. When I power on bays in particular order? Or change server profile config without un-assigning (only powered off: that's allowed right?)

2. When the OS bonding config is not complete/correct.

3. VC detecting a loop in my configuration?

Am I even making sense? Where can I read more about how the internal stacking links work? The X11-X14 are essentially uplink ports, right? In one LAG to the next bay peer, in my case?

->show stackinglink                 

Connection Status : Failed
Redundancy Status : Degraded

Stacking Mode : Full

No stacking links to display

Earlier:

->show stackinglink 

Connection Status : OK
Redundancy Status : OK

Stacking Mode : Full

===========================================
Link  Speed  Connected From  Connected To  
===========================================
1     10Gb   enc0:1:X11      enc0:2:X11    
2     10Gb   enc0:1:X12      enc0:2:X12    
3     10Gb   enc0:1:X13      enc0:2:X13    
4     10Gb   enc0:1:X14      enc0:2:X14    

I am not sure, but I think--amongst the things I have tried--VC reset fixes this.

Thanks in advance

[pmehta2]

I marked one VLAN as "Native" in a SUS (all servers were powered off). And seem to have triggered this.

----------------------------------------------------------------------------
Record    : 3205
Date/Time : 2017-08-30 20:10:00-05:00
Info      : NET:VLAN-xx-VC2:7003:Info
Message   : Enet Network changed
----------------------------------------------------------------------------
Record    : 3206
Date/Time : 2017-08-30 20:10:13-05:00
Info      : VCD:xxx_vc_domain:1026:Critical
Message   : Domain state NO_COMM : Stacking Links are not fully connected,
             Previous: Domain state DEGRADED, Cause: Stacking Connectivity
             Error: enc0:iobay2 does not have a stacking path to enc0:iobay1
----------------------------------------------------------------------------

[pmehta2]

Seems I was hitting this (nasty) bug on VC firmware 4.60:

https://support.hpe.com/hpsc/doc/public/display?docId=emr_na-a00029108en_us

I downgraded to 4.50 after taking a backup. But now I cannot restore from a backup made with a newer firmware. And thus I seem to have ended up with a very old configuration (How? Is a copy stored on board?).

Is there a way I can use the view the configbackup and re-create the config via CLI?

Thanks in advance