NEC IP8800/S2400 Series Troubleshooting Manual page 164

3.
Troubleshooting Functional Failures in Operation
No.
3 Setting of DHCP relay agent
4 Filter setting
102
Check Point Troubleshooting Steps
Confirm that the following inter-VLAN DHCP relay agent is set
correctly:
• Between pre-authentication VLAN and authentication server VLAN
• Between post-authentication VLAN and authentication server
VLAN
Confirm that the following inter-VLAN filter is set correctly:
• Between pre-authentication VLAN and post-authentication VLAN:
Set the filter to disable all IP communications.
• Between pre-authentication VLAN and authentication server
VLAN: Set the filter to relay the HTTP, DHCP, and ICMP
communications only.
• Between pre-authentication VLAN and VLAN to access: Set the
filer to disable all IP communications.
• Between post-authentication VLAN and authentication server
VLAN: Set the filter to relay the HTTP, DHCP, and ICMP
communications only.
• Between authentication server VLAN and VLAN to access: Set the
filter to disable all IP communications.
Certain packets may have been discarded by filtering, or packets may
have been discarded through bandwidth monitoring, discarding control,
or shaper of the QoS control. Check to see if the conditions of filtering
and QoS control in the configuration have been set up correctly and if
bandwidth monitoring, discarding control, or shaper has been set up
appropriately for system operation. For the procedure, see
"3.23.1 Checking Filtering/QoS Setting Information."