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SCRN-510 Hardware Installation Guide | DOC-SCRN-510-HIG_i4 | 16 October, 2020 | Page 15
tions. On failure, the last LED state will display the state that encountered the failure.
node boot sequence and corresponding LED behavior.
Table 4 Radio Node LED Boot Sequence
State
LED
Color
Description
Possible Failures and Actions
0. Power On/
Reset
Flashing
White
This is the initial state on startup. The radio
node bootup is controlled by firmware in this
state.
This state should be very short lived
and should transition to the next state
immediately.
1. Software
Initialization
Flashing
Green
The firmware has loaded and transferred
control to the bootloader. Additional
hardware initialization and validation are
performed during this state. This state
concludes with a lamp test, cycling through
all LED colors.
This state should be very short lived
and should transition to the next state
immediately.
A radio node should not stay in this
state indefinitely.
Note:
Flashing Green is also used to
indicate a radio node that has been
administratively disabled. This can be
determined from the CLI.
2. DHCP
Solid Red The radio node starts by sending out a DHCP
Request.
The radio node moves to the next state
(State 3) upon receiving a DHCP response
and an IP Address.
No DHCP Response, IP Address not
allocated.
Check cabling, DHCP Server
configuration.
3. Join
Solid
Blue
The radio node has an IP Address and sends a
UDP Join request to the Serving centralized
unit.
The radio node moves to the next state
(State 4) upon getting a JOIN GRANT from
the centralized unit.
No IP reachability to the centralized
unit.
Check IP network between radio node
and centralized unit for routing issues.
4. TFTP
Flashing
Blue
The radio node proceeds next to download
the operating system image from the
centralized unit.
The radio node moves to the next state
(State 5) after the image has been
downloaded.
Failure to download TFTP image.
Check firewall between radio node and
centralized unit.
5. Operating
System Booting
Flashing
Green
The radio node loads the operating system
and starts the default platform applications.
The radio node moves to the next state
(State 6) when it establishes connectivity
with the centralized unit.
Failure to start the operating system.
This normally points to a software/
build issue. Please contact Corning
support.
6. Running
Solid
Green
The operating system is running. The radio
node continues the startup sequence, but is
now controlled by the centralized unit.
The operating system is up and running
on the radio node.
Any subsequent state transitions can
now be tracked from events and logs
on the centralized unit.
