N9K-C9508 Standby SUP replacement

[Translator]

Nice to meet you
How do I replace an N9K-C9508 standby SUP running in ACI mode?

I checked "Installing or Replacing a Supervisor Module" on Hardware Installation Guide, but it says "Perform physical maintenance to the supervisors of the Nexus 9500-series ACI-mode switches ONLY after the spine has been decommissioned from the ACI fabric."
Since I think that the Supervisor is switched back to the ACI fabric in the 1-10 items of "Steps required for ACI Release 5.2 and later:" of Before you bigin, I think that it exactly means "Active SUP exchange must be separated from the fabric and replaced".

In this case, the "Steps required for ACI Release 5.2 and later:" part is not required, and the Supervisor that became Standby is inserted and removed as it is from the Step 1 section of Procedure and replaced (Upgrade if necessary) Is it correct?

Thank you very much

[Translator]

'Steps required for ACI Release 5.2 and later" 1. The login as root is written.
This should not be something that the user can do without permission, so it is a procedure when something goes wrong.
Decommissionis written to perform physical maintenance of the SUP only after,
Especially since it is not written that Decommission is required only for Active SUP exchange.
Both Active and Standby can be read so that Decommission is required during SUP replacement work.

[Translator]

ARX0, thank you for your reply
If you need a Decommission,When should I replace a standby SUP in Steps required for ACI Release 5.2 and later?
I was Commission at 10 with the console cable connected to the SUP, and I thought that I would replace it after that.

Does the Steps required for ACI Release 5.2 and later procedure read as if I was just switching over the SUP?

[Translator]

I don’t think it’s well written, so I’ll write it again.
Since the login as root is written and this cannot be done by the user in the first place, theSteps required for ACI Release 5.2 and later" is the procedure when a problem occurs.
If you take a closer look at the procedure, it seems that you have to type the command described when you have .rpmstore.

The replacement of the Standby SUP will be done after the Decommission, so it must be between 4 and 5.

[Translator]

Mr. ARX0,

Thank you for your reply this time too
This procedure doesn't know the subject, so you can't clearly imagine the correct replacement procedure

Before you bigin, it doesn’t seem like you’re in trouble
This is probably the procedure to use when replacing an Active SUP
So, I think it's about preventing Active's SUP from being started and starting it from Standby SUP.

If I exchange between 4 and 5, I don't know why or why I want to connect the console cable to the Second SUP in 2.
Replacing the console cable Does this mean that the console cable is replaced while connected to the port of the new SUP?
Or does Second SUP mean the new SUP?

[Translator · Accepted solution]

> So, Active SUP can not be started, and it will be started from Standby SUP Isn't it?

I don't think so.
For example, if you log in as root in 1. and change the permissions on the file, you may have problems syncing the file from the broken SUP.
In addition, if you replace after completing all processes from 1. to 10., it is against the guideline that physical work is done only after decommissioning.

> Replace the console cable Does this mean that you will replace it while connected to the port of the new SUP?
Or does Second SUP mean the new SUP?

5. This is not necessary if you are using a Standby SUP that is already running, as the image should be synchronized.
Therefore, the steps after 5. should be the SUP after the replacement where the image is not what you expected.
Then, the timing that can be exchanged after Decommission is between 4. and 5.
Therefore, the SUP with the Console Cable in 2. should be a new good SUP.

Another possibility, contrary to the wording of Before you begin, is that you may need to perform the above work if the SUP exchange has already been completed and the image of Standby SUP has not been synchronized for some reason.

Whether you exchange it in Before you begin or exchange it in advance, we can exchange and match the image above.
Also, since SUP images should generally be automatically synchronized in the first place, Before you begin is not necessarily a necessary procedure every time.
If you are interested, it is best to move your hand and try this and that.

[Translator]

Mr. ARX0,
Thank you for your reply.

As ARX0 says, I understand that the best way is to check it on the actual device.
However, because the equipment is currently running production, there is no way to verify it in advance, and we are gathering the correct information to replace it safely and without any impact.
The risk of servicing equipment in production today is simply unacceptable.

Since it is a procedure that is specified as "Before you bigin", I can not dispel the thought that it should be finished before entering "Procedure" of course.
If Step 5 or later is listed as After you finish, you can understand it with ARX0's answer
Although there is no mention of "replace here", replacing in the middle of the procedure seems too incomplete as a way to read the manual. I don’t think it’s possible to replace it before the procedure.

Personally, Decommission is necessary for Active SUP replacement, but this procedure feels correct when I think that it is not necessary for StandbySUP replacement.

[Translator · Accepted solution]

I'll give you an answer after thinking about the technical details of the procedure.
Although there are some thoughts, the main point is the recognition that I communicated, so please carefully consider how you can replace it safely without affecting it.

[Translator]

Thank you very much
I will use it as a reference