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upgrading NAC from 6.2 to version 8.0.54 fails

upgrading NAC from 6.2 to version 8.0.54 fails

New Contributor
i recently upgraded extreme NAc from 6.2 to versionn after that all windows 10 systesms are not connecting, while trying to upgrade to version getting some error. checked the internet connectivity its fine.

so request anyoone to kindly help on this.

Thanks in advance.
Kindly find the error while upgrading to

hmod 755 nac_appliance_64bit_sw_upgrade_to_8.0.4.54.bin
root@MHW-IAM-01:/$ ./nac_appliance_64bit_sw_upgrade_to_8.0.4.54.bin
Running Access Control Engine upgrade...
Removing upgrade directory from a previous upgrade...
Extracting upgrade files to: /opt/nac_upgrade
Current OS version is 12.04
Are you using an HTTP Proxy to access the internet for this device? (y/N)N

Internet connectivity verified.. Continuing.
WARNING: The Ubuntu OS and kernel will be upgraded during the installation. It could take
a significant amount of time to complete the installation (times may vary depending on the
internet connection speed and system resources). Customer-installed software packages may
may not work as intended after the OS upgrade. A reboot is required upon completion of the OS upgrade.

Would you like to continue, and automatically reboot after the installation is complete? (Y/n): Y

Stopping services...
Stopping Access Control Engine Server, done...
Agent-based Assessment Server shut down...
NAC Web Services shut down...
Stopping /usr/sbin/winbindd, done...
Stopping Proxy, done...
Stopping Watchdog Service, done.
Stopping Access Control Engine RADIUS Server, done
Updating apt..
Cleaning up unused packages..
Performing OS upgrade, upgrade speed may vary depending on the strength of the internet connection...

/opt/nac_upgrade/upgrade/all/ line 20: $LOG_FILE: ambiguous redirect

Honored Contributor
Have you checked the log as per the KB.....

"The exact error condition can be found in the /var/log/dist-upgrade/main.log."

New Contributor
But i checked the internet connectivity by running below command:

wget -v

root@MHW-IAM-01:~$ /var/crash
-bash: /var/crash: Is a directory
root@MHW-IAM-01:~$ cd /
root@MHW-IAM-01:/$ /var/crash
-bash: /var/crash: Is a directory
root@MHW-IAM-01:/$ wget -v
--2019-02-09 16:54:32--
Resolving (,,, ...
Connecting to (||:80... connected.
HTTP request sent, awaiting response... 301 Moved Permanently
Location: [following]
--2019-02-09 16:54:33--
Reusing existing connection to
HTTP request sent, awaiting response... 200 OK
Length: 1768 (1.7K) [text/html]
Saving to: `ubuntu.5'

100%[===========================================================================================================================================================>] 1,768 --.-K/s in 0s

2019-02-09 16:54:33 (337 MB/s) - `ubuntu.5' saved [1768/1768]


Honored Contributor

Make sure that nothing is filtered on the firewall for the NAC IP.