Try the following steps . Seems like the name resolution to the DC is not working .
> Remove the VCVA entry from DC/ AD
> Edit the /etc/hosts file of VCVA and point the DC ip and name
> Check the Time sync
> execute this command /opt/likewise/bin/domainjoin-cli --loglevel verbose --logfile . join <domain> <account> <password>
> Ensure that the domain joined correctly via this command : /opt/likewise/bin/lw-get-status
> Restart and check if all set
