[slurm-users] slurmd communication with master on ipv6

[toky0]

i’m trying to get slurmd on compute nodes to communicate with the controller over ipv6.
i’ve set up /etc/hosts like this
2001:db8::c01 master master.mynetwork
2001:db8::d01 node1 node1.mynetwork
2001:db8::d02 node2 node2.mynetwork
2001:db8::d03 node3 node3.mynetwork

and added these options to slurm.conf:
SlurmctldHost=master.mynetwork
CommunicationParameters=EnableIPv6,DisableIPv4

this is the same on compute nodes. 
then added the option 
SLURMD_OPTIONS=-vvvv --conf-server 2001:db8::c01
to /etc/sysconfig/slurmd

but all i’m getting as output is:
error: _fetch_child: failed to fetch remote configs
error: _establish_configuration: failed to load configs
slurmd.service: Main process exited, code=exited, status=1/FAILURE
error: slurmd initialization failed


any idea how to further troubleshoot ?

thanks.