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UCS 200 have CIMC issues shows address but does not respond to http requests

ryfoley
Cisco Employee
Cisco Employee

ok

i have 5  usc machines and doing the bios updates and CIMC updates  on 4 machine no issues . for some reason on the last machine it waned to be a pain .. i did the bios update just like all the other machines that are working and online ..  and then rebooted after that was complete i went into the CIMC console  web page of the system ( . like the other ones . went into the firmware management page . told the system to update the firmware . it took just the same amount of time as the other 4 machines . i watched it and it said complete with no issues .. .. so i told it to activate the new firmware that it downloaded to the system . and now it will not respond over IP anymore . not sure where to go and what to do next . do i need to call tech support and request a new machines ? .. is it dead ...

i have powered off the server . rebooted ....  and then booting up if does show that the CIMC does have an ipaddress on boot up . so i assume that it is working . i try and ping it from both my laptop and desktop . ( one wired and one wireless on different segments and they both respond but to no avail it still does not respond to http access ..

anyone have any ideas how to get it back online

thanks

ryan

31 Replies 31

Yes, that's right. I'm SSH'd to the ESXi address. I can't SSH to the CIMC

address, I don't get any error or anything. It seems like it connects but

it just hangs there, I never see any login prompts or anything for that

matter.

Do you think a re-boot is in order?

screen shot of my attempt to SSH to CIMC:

(Embedded image moved to file: pic23281.gif)

Josh Gertig

Voice Communications Analyst - Team Lead

National Rural Utilities Cooperative Finance Corporation

(703) 467-1695 (direct)

(571) 455-9359 (cell)

(703) 467-8976 (fax)

Yes, so that pretty much matches the behaviour of the bug I mentioned below.

A chassis power re-cycle would be required as a workaround to this issue.

./Abhinav

Will do this weekend, thanks for your help.

Josh Gertig

Voice Communications Analyst - Team Lead

National Rural Utilities Cooperative Finance Corporation

(703) 467-1695 (direct)

(571) 455-9359 (cell)

Not applicable

Hello

I have the same issue - the CIMC web interface on one UCS200 is accessible via https, but the second is not. I can ping it, but cannot access the web interface.  Any ideas? Maybe the OP could post his solution?

Thanks!

We are seeing the same issue on a UCS C210 M2 (1.3(2d)). Last week everything was fine, this week I can't SSH or web to either UCS box. No significant changes were performed on either UCS. I can ping and even open a command prompt and telnet to both boxes on 443 and it connects, so I don't think any firewall related issue has been introduced (our network team also assures us there is no fw element between my PC and the UCS).

Is there a way to restart webservice from the ESXi client or from SSH to the ESXi address (I can SSH to the ESXi address, but it's all linux ). Thanks!

We do have a known bug around the CIMC not being accessible.:

CSCtn06772    CIMC - does not respond - cannot access via SSH / HTTP / HTTPS

Symptom:
Cannot access CIMC via SSH / HTTP / HTTPS / Serial over LAN

Conditions:
If system can be accessed via CIMC Serial Console , then system is NOT running into this defect.


Workaround:
Power cycle chassis

./Abhinav

Hi abbharga,

In reference to your note below "If system can be accessed via CIMC Serial

Console , then system is NOT running into this defect"...

I finally found the console cable for our UCS, the one that plugs into the

front with the DB9 Serial, VGA and two USB ports. But when I connect to

that, I just get the ESXi interface, no CIMC. Is there some other way to

console to CIMC?

Thanks, you have been very helpful!

Josh

Josh Gertig

Voice Communications Analyst - Team Lead

National Rural Utilities Cooperative Finance Corporation

(703) 467-1695 (direct)

(571) 455-9359 (cell)

(703) 467-8976 (fax)

yep Powercycling is how I have fixed this in the past

Hi Robert,

This fix is avaiable in the current 1.4.x firmware version, post upgrade to the firmware you should not be facing this issue again.

Thanks!

./Abhinav

Abhinav,

Do you know this for a fact?

Based on another thread and all the information I can find on Cisco's website on the release notes for CIMC... this bug is NOT resolved.  At least not the bug we are experiencing (CSCtn06772)

Arrrghhh3,

Just curious, what are you experiencing. We upgraded to 1.4(3)c, which was the latest at the time. It didn't resolve the issue but made it better I would say.

Only one of two UCS servers was affected in the first place. That same server continues to have an issue, where the web interface goes down, but the difference is that we do not loose SSH (CLI) access. So, if needed, we can SSH to the affected server, and restart http (set enabled no ; set enabled yes) and we get the webpage for 10 minutes or so, then it goes out again.

At Cisco Live I spoke to some UCS folks who were familuar with the bug, but had never heard of our symptoms post upgrade. So I was curious if you might be having something similar.

Joshua,

Thanks for your post.  My issue is a bit different from yours - our CIMC is completely unresponsive (except for ICMP).  So for whatever reason we can ping it, we can NMAP the IP and it shows port 22, 80, & 443 are all open.  One engineer waited for a good 5 minutes, and evidently part of the CIMC web interface loads... but never provides a login prompt.  SSH never provides a login prompt either - but all of these ports I can connect to with telnet - so they are open and there's no network issues.  All CIMC's are running 1.4(2).

It seems like the only option is to power down all the guest OSes, and then power down the ESXi host.  Unplug all power plugs (probably for ~30 sec) then plug it back in and power everything back on.

This is the "workaround" for the bug, but I would prefer an actual fix.  Based on the thread I linked to, it appears there is one in the works.  Only one of our CIMC servers experienced this issue so far, but I don't want to take a chance and have this happen again.  This is supposed to be an out-of-band management interface - really simple, something that never fails.  With these types of failures, I feel like I need some sort of out-of-band management for the out-of-band management interface...

We also faced a CIMC problem when running on fimrware 1.4(1)..

Thanks to "Arrrghhh3" suggestion of unplugging the chassis and keeping it unplugged for about a minute or so, solved our problem. Very strange.

We also had a great amount of noice coming out of the chassis before we did this unplugging the power. After replugging, the noise was much less as well..

We were having issues with logging into CIMC GUI and we were not getting any response when we were hittin F8 during boot. We were seeing CIMC IP configuration error messages during the boot process.

mohsinsalimvs
Level 1
Level 1

I had a similar issue. Unable to access using http while I am able to ssh into it.

 

The issue was fixed by following the steps below.


UCSMGMT*# show http detail 
HTTP Settings:
    HTTP Port: 80
    HTTPS Port: 443
    Timeout: 1800
    Max Sessions: 4
    Active Sessions: 0
    Enabled: yes
    HTTP Redirected: yes
UCSMGMT# scope http 
UCSMGMT /http # set enabled no 
Warning: setting "enabled" to "no" will disconnect all 
 existing http connections and will disable login via WebUI.
UCSMGMT /http *# commit 
UCSMGMT /http # exit
UCSMGMT# show http detail 
HTTP Settings:
    HTTP Port: 80
    HTTPS Port: 443
    Timeout: 1800
    Max Sessions: 4
    Active Sessions: 0
    Enabled: no
    HTTP Redirected: yes
UCSMGMT# scope http 
UCSMGMT /http # set enabled yes 
UCSMGMT /http *# commit 
UCSMGMT /http # exit
UCSMGMT# show http detail
HTTP Settings:
    HTTP Port: 80
    HTTPS Port: 443
    Timeout: 1800
    Max Sessions: 4
    Active Sessions: 0
    Enabled: yes
    HTTP Redirected: yes
UCSMGMT# 

Steven Williams
Level 4
Level 4

Reboot the CIMC is what solved my issue.

#scope cimc

#reboot

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