Change Control Station IP for VNX

The installation of a VNX2

The first day is the toughest and easiest. Like baking a cake you need to make sure all the ingredients are there and ready to go. You verify what  was ordered is installed and is in working order. Sounds simple enough?

As it turns out the initial VNX “Rack and Stack” was correct.

  • All cables were plugged in correctly
  • No amber lights on the system.
  • The DAE (Disk Assembly Enclosures) were recognized.
  • No faults in Unisphere

Ok. Good to go? No? Why. Mr. Customer provided a duplicate IP for one of the control stations. The correct IP is the same subnet and mask but needs to be changed.

Here are the steps

  1. Log onto Unisphere confirm IP information for Control Station
  2. Log onto Control station via ssh

Use root/nasadmin (default)

3. Verify status of Control station. You can make changes to the primary not standby.

In this case the primary Control station was IP’d correctly. I need to change the secondary Control station, the standby.

/nasmcd/getreason  <<– run this command as root

Here is what you will see:

output:
10 – slot_0 primary control station
11 – slot_1 secondary control station
 5 – slot_2 contacted
 5 – slot_3 contacted
4. Failover the Control station with this command:
    /nasmcd/sbin/cs_standby -failover
   
About 5 minutes later you will reboot the primary and failover to the secondary. 
5. Run this: /nasmcd/getreason
output:
11 – slot_0 secondary control station
10 – slot_1 primary control station
 5 – slot_2 contacted
 5 – slot_3 contacted

6. Log into Unisphere

Normally you login to the VNX with using the primary Control Station IP. However since it is in failover mode use the secondary IP. In this case I am using the duplicate IP and will change it to the correct IP by using the Unisphere GUI

Screen Shot 2016-02-19 at 5.10.39 PM

Log into the Unisphere GUI as root. Make sure you choose scope “local” not Global

Navigate to the “Control station Properties Tab”

Screen Shot 2016-02-19 at 5.11.43 PM

Change the IP of the Control Station

Screen Shot 2016-02-19 at 5.12.20 PM

 

Click Apply.

In Confirm Action, click OK.

WARNING:

Modifying the Control Station hostname, IP address, subnet mask, or gateway may disrupt the Unisphere software connection and any other client access to the Control Station. It may be necessary to reconnect to continue administrative activities. If you make a mistake changing the network, the Control Station may no longer be reachable remotely.

7. ssh to the primary Control station and failback. Verify that the primary control station is in slot 0

#  /nasmcd/getreason
10 – slot_0 primary control station
11 – slot_1 secondary control station
 5 – slot_2 contacted
 5 – slot_3 contacted

That is it.

 

Remember when you login to Unisphere you connect via the Primary Control Station IP, if you are failed over you will connect to the secondary Control Station.

 

Thanks for reading! If you have a more efficient way please share. Yes, you can ssh in and do all of this via cli. 😉

 

 

 

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EMC Elect 2016.. by the numbers

The EMC Elect 2016 members have been announced.

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Wow what a privileged honor to be a part of this list. This year will be filled with many new challenges as EMC will have a flurry of changes internal to help the customer make their goals a success! I refer to the Dell + EMC adventure. I look forward to helping my customers and fellow IT professionals in 2016. Don’t forget that is just the business side. The never stopping change of technology is still in full force! The information to be consumed is non-stop, and the challenges for the customer to take advantage of this is incredible.  I know I am excited for 2016. Sharing the information and empower each other!

EMC Elect 2016 — Official list

FACT:

EMC Elect Summary

  • 2015 – 102 members chosen out of 450 nominations
  • 2016 – 71 members chosen out of 700 nominations

In 2015 – There were 450 nominations leading to 200 finalists, the 102 official directory of its members for 2015
In 2016 – There were 700 nominations, leading to 150 finalists. Of those finalists, under the toughest selection process for the EMC Elect here are the 71 members for 2016

In my opinion it seems that for 2016.. the selection process was roughly 10% of the nominated persons were chosen. There was an increase in nominations, but a decrease in the number of selected. I can only imagine how much a difficult task this was. Thanks for all the hard work Mr. Mark Brown @DathBrun

Here are some interesting facts by the numbers:

 

Number crunching for 2015  Great job Mr. Henry!

My attempt inspired by Mr. Henry @davemhenry

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I didn’t have a chance to calculate repeat EMC Elect members from former years. Metrics tell all sort of stories, but more over. Take a look at the content provided by the EMC Elect. There is A LOT!

Follow an EMC Elect member become informed and part of the discussion. Search for the tag #EMCElect.  Read the blogs (like this one) read up on the ECN (EMC Community Network). If you have a question reach out to a member via twitter or post on ECN. You will find very helpful individuals; who generally are very open to objective discussion on the technical merits of X, Y or Z!

Congrats to ALL the EMC ELECT 2016! And to all past EMC Elect… A famous quote to consider.

                   “If I have seen further than others, it is by standing upon the shoulders of giants.”                                                    -Sir Isaac Newton

@Digital_kungfu