Troubleshooting guide

3. Troubleshooting Functional Failures During Operation
126
4 Check the filtering configuration. Make sure that the filters are correctly set between the
following VLANs:
• Between the VLAN used for authentication and the
authenticated VLAN: A filter is set to disable all IP
communication.
• Between the VLAN used for authentication and the VLAN
for the authentication server: A filter is set to forward only
HTTP, DHCP, and ICMP communication.
• Between the VLAN used for authentication and the VLAN
for the network to be accessed: A filter is set to disable all
IP communication.
• Between the authenticated VLAN and the VLAN for the
authentication server: A filter is set to forward only HTTP,
DHCP, and ICMP communication.
• Between the VLAN for the authentication server and the
VLAN for the network to be accessed: A filter is set to
disable all IP communication.
Certain packets might have been discarded either by
filtering or by bandwidth monitoring, drop control, or the
QoS control shaper. Make sure that the setting conditions
for filters and QoS control in the configuration are correct,
and that bandwidth monitoring, drop control, or the shaper
is used appropriately in the system configuration. For
details about the procedure, see 3.25.1 Checking the filters
and QoS configuration information.
No. Items to check Action