Above, bold, message appeared every time the client could not receive an IP address.
When the issue is visible, please collect the following data and contact Extreme GTAC:
#show ip dhcp-snooping
#show ip dhcp-snooping external-save
#show ip dhcp-snooping interface
#show ip dhcp-snooping binding
#show ip dhcp-relay
#show ip arp-inspection
#show ip arp-inspection interface
Clearing DHCP Snooping binding table solves the problem. Please note that after clearing binding table, defining a root cause may be not possible.
To clear DHCP binding table use the following command: