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SX-200 ICP MX Technician’s Handbook
3. If you still can’t find the problem, call Mitel Technical Support.
IMPORTANT: Make sure you have the following information
on hand before calling:
• Is the problem with the local or remote subnet?
• DHCP server(s) settings
• Layer 2 switch configuration and settings
• Router configuration and settings
• Network Diagram
• IP addressing scheme
• VLAN configuration and settings
Table 58: IP Phone Registration Troubleshooting
Error Message on
Display
Probable Cause Corrective Action
Invalid VLAN ID DHCP Option not set
correctly.
1. Identify the location of DHCP server and
which DHCP server is assigned IP
address for the corresponding subnet.
2. For an external Microsoft DHCP server
(NT server, etc.), make sure that the
option type is set to LONG.
3. For a Cisco Router DHCP server, make
sure that the option type is set to hex,
and padded with 0s (for example,
0x00000002 for VLAN 2).
4. For the controller internal DHCP server,
set the option type to numeric.
Duplicated IP
Existing data device
owns the IP address.
1. Check the IP address on the phone
display.
2. Disconnect the IP Phone.
3. From a PC on the same subnet, ping
the suspected IP Phone. If there is a
response, identify the data device, and
resolve the conflict.
Corrupted DHCP
server.
On the suspected DHCP server, disable
then recreate the scope. If this is a
Microsoft DHCP server, reboot the server.
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