Mitel 3300 Technician's Handbook page 191

Table 44. Troubleshoot IP Phone Registration
Error Message on IP
Phone Display
Duplicated IP
DHCP discovery
DHCP discovery
DHCP discovery
DHCP discovery
Problems (continued)
Probable Causes
Corrupted DHCP
server
DHCP Option 130
(MITEL IP PHONE) is
not programmed.
DHCP server does not
have enough IP
addresses.
DHCP server is acting
up and cannot assign
IP addresses for the
corresponding subnet,
even though there are
enough IP addresses.
L2 switch port is shut
down or not
configured properly.
Troubleshooting
Corrective Action
1.
On the suspected
DHCP server, disable
then recreate the scope.
2.
If this is a Microsoft
DHCP, reboot the server.
Identify the location of
DHCP and set to
Option 130 as String
type with value of
"MITEL IP PHONE".
Create a larger scope
with more IP
addresses on the
DHCP server.
1.
For a Microsoft DHCP
server, reboot the server.
2.
For the Controller
internal DHCP, disable
DHCP and rebuilt the
scope.
1.
Check the L2 switch,
and ensure that the port
is not shut down.
2.
Ensure that this port
can access the DHCP
server subnet (that is,
access the port for the
same VLAN, etc.).
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