State-unknown has this reason: Node is not usable. Since server’s latest start, no communication
with this vnode. May be network or hardware problem, or no MoM on vnode
PBS Server:
cat /etc/hosts | grep -e headnode -e n01
pbs_hostn -v headnode
pbs_hostn -v n01
n01:
cat /etc/hosts | grep -e headnode -e n01
pbs_hostn -v headnode
pbs_hostn -v n01
Between PBS Server and n01 – ports 15001 to 15007 and 17001 should be open for communication.
I hope these systems does not have multipe network adapters pointing to different IP / hostnames.
Can you try deleting the node and adding it again
qmgr : d n n01
qmgr : c n n01 Mom=n01.domain.tld or c n n01