NEC IP8800/S2400 Manuale Utente

3.   

Troubleshooting Functional Failures in Operation

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Setting of DHCP relay agent

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

4

Filter setting

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 
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No.

Check Point

Troubleshooting Steps