Mitel 3300 Technician's Handbook page 193

Table 44. Troubleshoot IP Phone Registration
Error Message on IP
Phone Display
DHCP Discovery
(VLAN) (after
releasing the first IP
from the native DHCP
server)
DHCP Discovery
(VLAN) (after
releasing the first IP
from the native DHCP
server)
DHCP Discovery
(VLAN) (after
releasing the first IP
from the native DHCP
server)
Problems (continued)
Probable Causes
The DHCP server is
acting up and cannot
assign IP addresses
for the corresponding
subnet even though
there are enough IP
addresses.
The L2 switch port for
the phone interface is
shut down or not
configured properly.
The L2 switch port for
the router interface is
shut down or not
configured properly.
Troubleshooting
Corrective Action
1.
For a Microsoft DHCP
server, reboot the server.
2.
For the Controller
internal DHCP, disable
DHCP and rebuild the
scope.
1.
Check the L2 switch
and ensure that the port
is not shut down.
2.
For a Cisco L2 switch ,
ensure that this is a trunk
port with Dot1q
encapsulation, and that
this trunk port allows
both native and Voice
LAN to pass through.
3.
For an HP L2 switch,
ensure that Native Lan is
untagged, and that Voice
LAN is tagged.
1.
Identify if there are two
physical interfaces to the
router (one per VLAN), or
a router on a stick
configuration (one
physical with virtual sub-
interfaces).
2.
Ensure that the port(s)
on both sides ( L2 switch
and router) are not shut
down.
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