Upgrade Failure Due to PGEvent
If the upgrade fails because the Postgres installer is unable to install the pgevent.dll file, disable the DHCP services before upgrading your DCNM.
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This chapter describes how to identify and resolve problems related to upgrading Cisco DCNM.
If the upgrade fails because the Postgres installer is unable to install the pgevent.dll file, disable the DHCP services before upgrading your DCNM.
If the compatibility check or upgrade fails with following error, you can execute the clear ssh hosts CLI on the switch where you encountered the error.
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@ WARNING: REMOTE HOST IDENTIFICATION HAS CHANGED! @
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IT IS POSSIBLE THAT SOMEONE IS DOING SOMETHING NASTY!
Someone could be eavesdropping on you right now (man-in-the-middle attack)!
It is also possible that a host key has just been changed.
The fingerprint for the ECDSA key sent by the remote host is
SHA256:Q8jsP83AsGsnCry+/Pg1cJd3Pnpd9pTbk67rfwLoB2A.
Please contact your system administrator.
Add correct host key in /var/home/admin/.ssh/known_hosts to get rid of this
message.
Offending RSA key in /var/home/admin/.ssh/known_hosts:1
ECDSA host key for 10.5.1.4 has changed and you have requested strict checking.
Host key verification failed.
If the image upgrade using Cisco DCNM fails with a permission error, perform the following steps:
Change the name of the image file and reupload it to DCNM so that there is no conflict on the switch. For information, see the Image Upload section in the respective configuration guides.
Upgrade the switch. For information, see Install & Upgrade section in the respective configuration guides.
(Optional) Remove the old file on the switch with the incorrect permissions.
If you are running an older NX-OS version on the switch, perform the following steps:
Remove the image file with permission errors on the switch.
Perform ISSU from DCNM. For information, see the Install & Upgrade section in the respective configuration guides.
For more information, see Configuration Guides.