First do this (turn oncdp/lldp):
system node run -node * options cdpd.enable on
system node run -node * options lldp.enable on
Wait for 3 minutes for LLDP/CDP to talk.
Then do this (assuming all your MGMT and ClusMGMT are on e0M):
network device-discovery show -port e0M
This should show which switches and switch ports you e0M ports are connected to. Maybe you are connected to a wrong switch. Maybe the access VLAN is set incorrectly at the switch port.
Try testing to the gateway
network ping -lif <node-mgmt> -vserver <admin-svm> -destination <gateway_ip>
Repeat for each NODE-MGMT
Check your Broadcast-Domains
broadcast-domain show
You should see one (unless you renamed it, it will be called Default) that includes the e0M ports.
Make sure ***ALL THE PORTS*** in that broadcast domain are correct! When adding in new nodes, *ALL* ports get added to the Default broadcast-domain. You may need to remove ports that should not be there!
Check the LIFs failover ports:
network interface show -role node-mgmt|cluster-mgmt -failover
VERIFY the ports listed are correct. If not, the broadcast-domain is incorrect!
Finally, check failover-policy:
network interface show -role node-mgmt|cluster-mgmt -fields failover-polcy
All the NODE-MGMT LIFs should be local-only. The Cluster-MGMT could be system-defined. I would modify to broadcast-domain-wide:
network interface modify -lif <cluster_mgmt> -vserver <admin_svm> -failover-policy broadcast-domain-wide
Hope that helps. If you still have trouble, please think about posting some of the out from the commands above here.