Troubleshooting guide

Troubleshooting Guide
74
TFTP Fail
(Remote IP phone
(statically programmed IP
address) cannot access
MN3300 across WAN).
The Layer 2 switch port for the
phone interface is shut down or
not configured properly.
1. Check the Layer 2 switch and ensure that
the port is not shut down (see “Network
Configuration Examples” in the “Typical
Network Configurations” chapter of the MCD
Technician’s Handbook for more
information).
2. For a Cisco Layer 2 switch: verify that this is
a trunk port with Dot1q encapsulation, and
ensure this trunk port allows both native and
voice LAN to pass through.
3. For an HP Layer 2 switch: verify that Native
Lan is untagged and Voice Lan is tagged.
The Layer 2 switch port for router
interface is shut down or not
configured properly.
1. Verify which configuration you have (see
“Network Configuration Examples” in the
“Typical Network Configurations” chapter of
the MCD Technician’s Handbook for more
information).
2. Ensure the port(s) on both sides (Layer 2
switch and router) are not shut down.
3. If there is physical interface on the router for
each VLAN, make sure that the Layer 2
switch is set to access the port for the
corresponding VLAN/subnet correctly; OR
If this is a router on a switch, verify that this
is a trunk port on L2 switch, and ensure this
trunk port allows both native and voice LAN
to pass through.
4. On the router's sub-interface, verify that the
proper VLAN is associated to the
sub-interface (see “Network Configuration
Examples” in the “Typical Network
Configurations” chapter of the MCD
Technician’s Handbook for more
information)).
(Cont’d) Typo in IP address, VLAN ID,
gateway.
1. Delete and reprogram the static IP address.
If there is no VLAN or priority, leave them as
blank.
2. Verify that the gateway IP address is correct.
Table 18: IP Phone Registration Troubleshooting
Error Message on
Display
Possible Cause Corrective Action
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