Configuration Examples‎ > ‎HP / HPE‎ > ‎SDN‎ > ‎

SDN Errors

I have so far encountered the following errors, and have provided the steps to resolve.

I recommend tailing the log files and repeating the steps to re-create the error to help you troubleshoot

$ sudo tail -f /var/log/sdn/virgo/logs/log.log

Problem: Presented with a white / blank page after logging in.
Resolution: Provide more RAM to OS in line with product guides - make sure you assign 8GB RAM and 4x CPU's.

Problem: Unable to log in - Invalid user & password combination specified!

1. If you are running 2.4, make sure you have run this command to input the local SDN user information into Keystone
$ sudo /opt/sdn/admin/config_local_keystone

2. Tail the log file - the 401 error means an invalid username / password combination. The error code 500 means something has gone squiffy with Keystone

Failed to authenticate sdn domain user sdn due to com.hp.api.auth.AuthenticationException: Validation error code 401

Failed to authenticate sdn domain user sdn due to com.hp.api.auth.AuthenticationException: Validation error code 500

With the error 500, I had to reinstall Keystone to resolve it. Follow the steps below (for SDN VAN 2.4 Controller)

$ sudo apt-get purge keystone
$ sudo rm -Rf /var/lib/keystone/
$ sudo apt-get install keystone
$ sudo /opt/sdn/admin/config_local_keystone


I ran in this this problem, specific with firefox browser:
Failed to validate token [token] due to com.hp.api.auth.AuthenticationException: Validation error code 404

Log in with Chrome, or IE and it works fine - Don't mess around with keystone, just simply clear your history / browser cache and you can log in fine!


I had a problem where the SDN application failed to start, and it turned out the hard drive had been completely filled. It turns out that there is a 'bug' in HP SDN Controller 2.5.20  which consumes all of the inodes - see

Run a df -i and you will notice the root / partition is at 100%

sdn@sdn01:~$ df -i
Filesystem      Inodes   IUsed   IFree IUse% Mounted on
/dev/sda1      3801088 3801088       0  100% /
udev           1019931     432 1019499    1% /dev
tmpfs          1022257     305 1021952    1% /run
none           1022257       5 1022252    1% /run/lock
none           1022257       1 1022256    1% /run/shm

and you cannot create any new files

mkdir temp
mkdir: cannot create directory `temp': No space left on device

I temporarily deleted this folder to resolve the issue, but ultimately you should create a cron job to remove older files.

rm -rf /opt/sdn/virgo/metrics/2015

ERR_SSL_VERSION_OR_CIPHER_MISMATCH - Old ciphers used on older versions of the HPE SDN Controller, follow the guide below to resolve the issue.


I'm sure more will be added as I encounter them, feel free to contact me if you find any others :)