I upgraded an EX2300 to the JTAC recommended firmware via Space. After the upgrade, the switch worked fine, but never reconnected to Space. I deleted the device and tried to rediscover it. The discovery failed with the error: "Fingerprint mismatch. Host key verification failed."
I know this is likely because the new firmware generated a new SHA key for the switch, but I don't know how to clear the existing keys on Space. I looked at this article talking about similar issues with an SRX, but it didn't help.
I can't do this because the switch is not listed in the devices. It was at one point, but I removed it when access was lost to the switch. I now cannot rediscover the switch because of the fingerprint mismatch.
When I was trying to discover the device, I was using a super-user account setup on the switch for the discovery. Using this account, I recevied the following error message from Space when the job failed: "Fingerprint mismatch. Host key verification failed."
I ran the following commands to find the RSA fingerprint on the switch: