rtd IDAN-ID5915 User manual

RTD Embedded Technologies, Inc.
AS9100 and ISO 9001 Certified
IDAN-ID5915
Cisco® 5915 Embedded Services Router for IDAN
User’s Manual
IDM-650020046 Rev. C

RTD Embedded Technologies, Inc.
103 Innovation Boulevard
State College, PA 16803 USA
Telephone: [phone]
Fax: [phone]
www.rtd.com
[email protected]
[email protected]

RTD Embedded Technologies, Inc. | www.rtd.com iii IDAN-ID5915 User’s Manual
Revision History
Rev A Initial Release
Rev B Corrected Storage Temperature to match Cisco’s specifications, minor fixes.
Rev C Added information about JP1
Advanced Analog I/O, Advanced Digital I/O, aAIO, aDIO, a2DIO, Autonomous SmartCal, “Catch the Express”, cpuModule, dspFramework, dspModule, expressMate, ExpressPlatform, “MIL Value for COTS prices”,
multiPort, PlatformBus, StackNET, eBuild, and PC/104EZ are trademarks, and “Accessing the Analog World”, dataModule, IDAN, HiDAN, HiDANplus, RTD, and the RTD logo are registered trademarks of RTD
Embedded Technologies, Inc. (formerly Real Time Devices, Inc.). PS/2 is a trademark of International Business Machines Inc. PCI, PCI Express, and PCIe are trademarks of PCI-SIG. PC/104, PC/104-Plus, PCI-104,
PCIe/104, PCI/104-Express and 104 are trademarks of the PC/104 Consortium. All other trademarks appearing in this document are the property of their respective owners.
Failure to follow the instructions found in this manual may result in damage to the product described in this manual, or other components of the system. The procedure set forth in this manual shall only be performed
by persons qualified to service electronic equipment. Contents and specifications within this manual are given without warranty, and are subject to change without notice. RTD Embedded Technologies, Inc. shall not
be liable for errors or omissions in this manual, or for any loss, damage, or injury in connection with the use of this manual.
Copyright © 2018 by RTD Embedded Technologies, Inc. All rights reserved.

RTD Embedded Technologies, Inc. | www.rtd.com iv IDAN-ID5915 User’s Manual
Table of Contents
1Introduction 7
Product Overview........................................................................................................................................................................ 7
Features...................................................................................................................................................................................... 7
Ordering Information................................................................................................................................................................... 8
Contact Information .................................................................................................................................................................... 9
1.4.1 Sales Support 9
1.4.2 Technical Support 9
2Specifications 10
Operating Conditions ................................................................................................................................................................ 10
Electrical Characteristics .......................................................................................................................................................... 10
3IDAN Connections 11
Module Handling Precautions................................................................................................................................................... 11
Physical Characteristics............................................................................................................................................................ 11
Connectors................................................................................................................................................................................ 12
3.3.1 External I/O Connectors 12
3.3.1.1 Front Panel Connector Locations 12
3.3.1.2 RJ-45 Fast Ethernet Ports (FE0/0, FE0/1, FE0/3, and FE0/4) 13
3.3.1.3 Serial Console Port 13
3.3.2 Internal Connectors 14
CN1(Top) & CN2(Bottom): PCIe Connector 14
CN3: PCI Connector 14
CN4(Top) & CN7(Bottom): FE0/2 StackNETTM Connector 15
JP1: Onboard 3.3V Power Supply Disable 15
Steps for Installing .................................................................................................................................................................... 16
4Functional Description 17
Block Diagram........................................................................................................................................................................... 17
Routed Ethernet Ports (FE0/0 & FE0/1) ................................................................................................................................... 17
Switched Ethernet Ports (FE0/2, FE0/3, & FE0/4) ................................................................................................................... 17
Console Port ............................................................................................................................................................................. 18
Status LEDs.............................................................................................................................................................................. 19
CLR Button ............................................................................................................................................................................... 19
5Software Overview 21
General Expectations ............................................................................................................................................................... 21
Command Line Basics.............................................................................................................................................................. 21
Configuration Basics................................................................................................................................................................. 22
Setting a Password................................................................................................................................................................... 22
Enabling the CLR Button .......................................................................................................................................................... 23
Restoring Default Settings via CLI............................................................................................................................................ 23
Cisco Software Updates ........................................................................................................................................................... 24
Network Security Considerations.............................................................................................................................................. 24
6Troubleshooting 25
7Additional Information 26
PC/104 Specifications............................................................................................................................................................... 26

RTD Embedded Technologies, Inc. | www.rtd.com vIDAN-ID5915 User’s Manual
Cisco 5915 Embedded Services Router Overview................................................................................................................... 26
Cisco 5915 Embedded Services Router Data Sheet................................................................................................................ 26
Cisco 5915 Embedded Services Router Hardware Technical Guide ....................................................................................... 26
Software Configuration Guide for Cisco IOS ............................................................................................................................ 26
Cisco Guide to Harden Cisco IOS Devices .............................................................................................................................. 26
Cisco Router Configuration Handbook ..................................................................................................................................... 26
8Limited Warranty 27

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Table of Figures
Figure 1: IDAN-ID5915D (Downward Stacking) ....................................................................................................................................................... 8
Figure 2: IDAN-ID5915D (Upward Stacking)............................................................................................................................................................ 8
Figure 3: Exterior Dimensions for IDAN-ID5915D (Not to Scale)........................................................................................................................... 11
Figure 4: Exterior Dimensions for IDAN-ID5915U (Not to Scale)........................................................................................................................... 12
Figure 5: Front Panel Connector Locations for IDAN-ID5915D (Not to Scale) ...................................................................................................... 12
Figure 6: Front Panel Connector Locations for IDAN-ID5915U (Not to Scale) ...................................................................................................... 13
Figure 7: RJ-45 Connector ..................................................................................................................................................................................... 13
Figure 8: Console Connector.................................................................................................................................................................................. 13
Figure 9: Example IDAN System ............................................................................................................................................................................ 16
Figure 10: IDAN-ID5915 Block Diagram................................................................................................................................................................. 17
Figure 11: Serial Console Typical Boot Messages................................................................................................................................................. 18
Figure 12: Serial Console Default Command Prompt ............................................................................................................................................ 19
Figure 13: Serial Console After Pressing CLR ....................................................................................................................................................... 20
Figure 14: Switching to privileged EXEC mode...................................................................................................................................................... 21
Figure 15: Listing Commands................................................................................................................................................................................. 22
Figure 16: Listing Options for a Command............................................................................................................................................................. 22
Figure 17: Changing the Configuration................................................................................................................................................................... 22
Figure 18: Setting Passwords................................................................................................................................................................................. 23
Figure 19: Loading Defaults.................................................................................................................................................................................... 24
Table of Tables
Table 1: Ordering Options ........................................................................................................................................................................................ 8
Table 2: Operating Conditions ................................................................................................................................................................................ 10
Table 3: Electrical Characteristics .......................................................................................................................................................................... 10
Table 4: RJ-45 Signal Assignments........................................................................................................................................................................ 13
Table 5: Console Signal Assignments.................................................................................................................................................................... 14
Table 6: Serial Console Cable Signal Assignments ............................................................................................................................................... 14

RTD Embedded Technologies, Inc. | www.rtd.com 7IDAN-ID5915 User’s Manual
1Introduction
Product Overview
The IDAN-ID5915 incorporates the Cisco 5915 Embedded Services Router into RTD’s standard IDAN packaging technology.It provides all
necessary connections to interface with the board-level router product. The router may be operated standalone with a power supply, or
stacked with RTD’s cpuModules and other peripherals using the PCI/104-Express stackable bus structure. Using RTD StackNETTM
technology, the router may be stacked with RTD’s line of scalable Gigabit Ethernet Switches to provide additional ports.
Features
▪Integrated Cisco 5915 Embedded Services Router (ESR)
oCisco IOS 15.x Operating System
oEnterprise Base software standard
▪Industry-standard Cisco IOS command set and configuration
▪Support for WAN connection redundancy on Routed ports
•Primary and Backup Interface
•IP SLA
▪VLAN Support
•Up to 32 VLANs
•802.1q Trunking
▪Standard routing protocols such as RIP, OSPF, BGP
▪PPP and PPPoE
▪Network Address Translation (NAT)
▪DHCP client, server, and relay
▪Traffic Management (QoS, 802.1p)
▪Management via Serial Console, Telnet, HTTP, SNMP
oOptional Advanced Enterprise software adds the following features:
▪Cisco IOS Service Advertisement Framework (SAF)
▪MLD Proxy
▪IPv6 Support
▪Firewall and Intrusion Prevention
▪VPN Support
▪Radio-aware routing (DLEP, R2CP, RFC 5578)
▪OSPFv3 Support for Ad Hoc Mobile Networks
▪Mobile IP
▪Security and Cryptography Features (IPsec, AES, IKE, Suite-B, SSL/TLS, PKI)
▪Cisco Unified Communications Manager Express support (up to 48 phones)
▪Secure Shell (SSH) Client and Server
oCisco Mobile Ready Net capabilities
oHighly secure data, voice, and video communication
oOnboard hardware encryption
o512 MB DRAM
o256 MB Flash Memory
▪5x Fast Ethernet 10/100 Ports (4x available for external connectivity)
oRJ-45 connectors with integrated LEDs
oSupports auto-negotiation of speed and duplex
o2x Routed Ports for remote connections (Layer 3)
o2x Switched Ports for local connections (Layer 2)
o1x Switched Port internal to the stack for use with other RTD StackNETTM products
▪1x Serial Console Port
oManagement and configuration interface
oRS-232 signaling
oModem Flow Control
▪LED indicators
oPower/Status
oEthernet Link/Activity
oOver Temperature
oFactory Defaults
▪Push button erasure of router memory and flash for quick declassification.
▪PCI/104-Express stackable bus structure

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oPCIe pass-through (Universal, Type 1 or Type 2)
oPCI pass-through expansion bus
▪Two StackNETTM configurations available
oUpward stacking, for use at the bottom of an IDAN stack
oDownward stacking, for use at the top of an IDAN stack
▪Modular rugged milled aluminum frames
▪Maintains the PC/104 bus self-stacking concept
▪Allows quick interchangeability of modules
▪Passive structural heat sink
▪Aluminum Alloy - 6061, Temper-T6
▪Finish - MIL-PRF-85285 polyurethane topcoat, per FED-STD-595, color 36495 (light gray).
▪Panel engravings per FED-STD-595, color 37038 (black).
▪Additional paint options available upon request
Ordering Information
The IDAN-ID5915 is available with the following options:
Table 1: Ordering Options
Part Number
Description
IDAN-ID5915D-4E
Cisco 5915 Router in modular IDAN slice,
downward-stacking StackNETTM configuration,
Enterprise Base software
IDAN-ID5915U-4E
Cisco 5915 Router in modular IDAN slice,
upward-stacking StackNETTM configuration,
Enterprise Base software
IDAN-ID5915D-4A
Cisco 5915 Router in modular IDAN slice,
downward-stacking StackNETTM configuration,
Advanced Enterprise software
IDAN-ID5915U-4A
Cisco 5915 Router in modular IDAN slice,
upward-stacking StackNETTM configuration,
Advanced Enterprise software
Figure 1: IDAN-ID5915D (Downward Stacking)
Figure 2: IDAN-ID5915D (Upward Stacking)
The Intelligent Data Acquisition Node (IDAN®) building block can be used in just about any combination with other IDAN building blocks to
create a simple but rugged 104™ stack. This module can also be incorporated into a tailored RTD HiDAN®or HiDANplus®High Reliability
Intelligent Data Acquisition Node with cylindrical connectors. Ready-made eBuildTM systems are available as well. Contact RTD sales for more
information on our high reliability systems.

RTD Embedded Technologies, Inc. | www.rtd.com 9IDAN-ID5915 User’s Manual
Contact Information
1.4.1 SALES SUPPORT
For sales inquiries, you can contact RTD Embedded Technologies sales via the following methods:
Phone: [phone] Monday through Friday, 8:00am to 5:00pm (EST)
E-Mail: [email protected]
1.4.2 TECHNICAL SUPPORT
If you are having problems with your system, please try the steps in the Troubleshooting chapter of this manual. For help with this product, or
any other product made by RTD, you can contact RTD Embedded Technologies technical support via the following methods:
Phone: [phone] Monday through Friday, 8:00am to 5:00pm (EST)
E-Mail: [email protected]
The IDAN-ID5915 includes one year of technical support and software updates from Cisco for the 5915 Embedded
Services Router. Questions regarding the 5915 ESR configuration should be directed to Cisco TAC. Visit
http://support.cisco.com for contact information.

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2Specifications
Operating Conditions
Symbol
Parameter
Test Condition
Min
Max
Unit
Vcc5
5V Supply Voltage
4.75
5.25
V
Vcc3
3.3V Supply Voltage
n/a
n/a
V
Vcc12
12V Supply Voltage
n/a
n/a
V
Vcc-12
-12V Supply Voltage
n/a
n/a
V
Ta
Operating Temperature
-40
+85
C
Ts
Storage Temperature
Limited by Cisco 5915 ESR
specification
-51
+85
C
RH
Relative Humidity
Non-Condensing
0
90%
%
MTBF
Mean Time Before Failure
Telcordia Issue 2
30°C, Ground benign, controlled
TBD
Hours
Table 2: Operating Conditions
Electrical Characteristics
Symbol
Parameter
Test Condition
Min
Typical
Max
Unit
P
Total Power Consumption
Vcc5 = 5.0V
5.6
10.19
W
Icc5
5V Input Supply Current
Active
1120
2038
mA
Inrush
2121
mA
VOUT3
PCI 3.3V Output Voltage
3.14
3.3
3.47
V
IOUT3
PCI 3.3V Output Current
500
mA
Table 3: Electrical Characteristics

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3IDAN Connections
Module Handling Precautions
To prevent damage due to Electrostatic Discharge (ESD), keep your module in its antistatic bag until you are ready to install it into your system.
When removing it from the bag, hold the module by the aluminum enclosure, and do not touch the components or connectors. Handle the
module in an antistatic environment, and use a grounded workbench for testing and handling of your hardware.
Physical Characteristics
•Weight: Approximately 0.68 Kg (1.5 lbs.)
•Dimensions: 152 mm L x 130 mm W x 35 mm H (5.983 in L x 5.117 in W x 1.388 in H)
Figure 3: Exterior Dimensions for IDAN-ID5915D (Not to Scale)

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Figure 4: Exterior Dimensions for IDAN-ID5915U (Not to Scale)
Connectors
3.3.1 EXTERNAL I/O CONNECTORS
3.3.1.1 Front Panel Connector Locations
Figure 5: Front Panel Connector Locations for IDAN-ID5915D (Not to Scale)

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Figure 6: Front Panel Connector Locations for IDAN-ID5915U (Not to Scale)
3.3.1.2 RJ-45 Fast Ethernet Ports (FE0/0, FE0/1, FE0/3, and FE0/4)
FE0/0, FE0/1, FE0/3, and FE0/4 are standard female RJ-45 connectors. The figure below shows the pin numbers when looking
into the connector.
Figure 7: RJ-45 Connector
FE0/0, FE0/1, FE0/3, and FE0/4 use UTP (Unshielded Twisted Pair) wiring normally used for 10/100 Base-T Ethernet. Both routed
and switched ports use the same pinout. The following table gives the pinout.
Pin
10/100 Function
1
A0+ (Transmit +)
2
A0- (Transmit -)
3
A1+ (Receive +)
4
A2+ (Not Used)
5
A2- (Not Used)
6
A1- (Receive -)
7
A3+ (Not Used)
8
A3- (Not Used)
Table 4: RJ-45 Signal Assignments
3.3.1.3 Serial Console Port
The Serial Console port is a standard female 9-pin D-SUB connector. The figure below shows the pin numbers when looking into
the connector.
Figure 8: Console Connector
The Serial Console signaling level is RS-232, and it follows the standard RS-232 device pinout. The following table gives the pinout.

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Pin
Function
1
No Connect
2
TXD
3
RXD
4
DSR
5
GND
6
DTR
7
CTS
8
RTD
9
No Connect
Table 5: Console Signal Assignments
Since the Serial Console uses the device pinout, connections from a computer should be made using a straight-through serial cable
(M-to-F). A Null Modem cable (which is typically M-to-M) will not work. The straight-through cable pinout would be as follows:
Computer Serial Port
Router Console Port
DB-9 Male
DB-9 Female
Pin
Function
Pin
Function
1
DCD
X
1
No Connect
2
RXD
←
2
TXD
3
TXD
→
3
RXD
4
DTR
→
4
DSR
5
GND
↔
5
GND
6
DSR
←
6
DTR
7
RTS
→
7
CTS
8
CTS
←
8
RTS
9
RI
X
9
No Connect
Table 6: Serial Console Cable Signal Assignments
3.3.2 INTERNAL CONNECTORS
CN1(Top) & CN2(Bottom): PCIe Connector
The PCIe connector provides power to the IDAN slice. Either CN1 or CN2 will be populated, depending on whether an upward or downward
stacking configuration was ordered. The position and pin assignments are compliant with the PCI/104-Express Specification.(Refer to the
PC/104 Specifications in the Additional Information chapter.)
While the Cisco 5915 Router uses PC/104 form factor, it is not an “active” device on the bus. It does not communicate over the PCIe bus, and
it does not consume a PCIe link. The PCIe bus is used for power only.
When powered via the PCIe/104 connector, only +5V is required. The IDAN slice includes a voltage regulator to provide +5V and +3.3V the
Cisco 5915 board requires. Note this onboard regulator does not provide +3.3V to the PCIe/104 bus. (However, it does provide +3.3V to the
PCI-104 bus, see below.)
CN3: PCI Connector
The PCI connector provides power to the Cisco 5915 Router. The PCI connector may be accessible from either the top of the bottom of the
IDAN slice, depending on whether the upward or downward stacking configuration was ordered. The position and pin assignments are
compliant with the PCI-104 Specification. (Refer to the PC/104 Specifications in the Additional Information chapter.)
While the Cisco 5915 Router uses PCI-104 bus structure, it is not an “active” PCI device. It does not communicate over the PCI bus, and it
does not consume a PCI slot. The PCI bus is used for power only. The LAN25E5915 board in the IDAN slice includes a voltage regulator to
provide +5V and +3.3V the Cisco 5915 board requires. If powering the IDAN-ID5915 from the PCI bus, only +5V should be connected.
NOTE: The IDAN-ID5915 provides +3.3V power to the PCI bus. Care must be
taken to ensure if another device providing +3.3V on the bus (such as
a power supply board), that the onboard 3.3V supply is disabled. If
multiple +3.3V power supplies are operating simultaneously, the
system may be damaged or destroyed.

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CN4(Top) & CN7(Bottom): FE0/2 StackNETTM Connector
CN4/CN7 is a board-to-board Fast Ethernet connection which allows the IDAN-ID5915 to be stacked with other RTD StackNETTM products,
such as Ethernet switches. Either CN4 or CN7 will be populated, depending on whether an upward or downward stacking configuration was
ordered. By stacking the router with an Ethernet switch, the overall Ethernet port count of the IDAN system may be increased.
JP1: Onboard 3.3V Power Supply Disable
JP1 is used to disable the onboard 3.3V Power Supply. When connecting other devices to the PCI connector that provide 3.3V, such as power
supply board, the 3.3V power supply needs to be disabled to prevent damage.
JP1 Pin Numbering
Pin 3
Pin 2
Pin 1
JP1 Settings
Setting
Description
Notes
1 –2
Onboard 3.3V Enabled
2 –3
Onboard 3.3V Disabled
Open
Onboard 3.3V Enabled
Factory default

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Steps for Installing
1. Always work at an ESD protected workstation, and wear a grounded wrist-strap.
2. Turn off power to the IDAN system.
3. Remove the module from its anti-static bag.
4. Check that pins of the bus connector are properly positioned.
5. Check the stacking order; make sure all of the busses used by the peripheral cards are connected to the cpuModule.
6. Hold the module by its edges and orient it so the bus connector pins line up with the matching connector on the stack.
7. Gently and evenly press the module onto the IDAN system.
8. If any boards are to be stacked above this module, install them.
9. Finish assembling the IDAN stack by installing screws of an appropriate length.
10. Attach any necessary cables to the IDAN system.
11. Re-connect the power cord and apply power to the stack.
12. Boot the system and verify that all of the hardware is working properly.
Figure 9: Example IDAN System

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4Functional Description
Block Diagram
The Figure below shows the functional block diagram of the IDAN-ID5915. The various parts of the block diagram are discussed in the
following sections.
Figure 10: IDAN-ID5915 Block Diagram
Routed Ethernet Ports (FE0/0 & FE0/1)
The routed ports are traditionally used for the WAN interface of the system. Each port is an independent Layer 3 interface, and may be
configured with its own IP address. In the Cisco IOS operating system, these ports are identified as follows:
•FE0/0 is identified as interface FastEthernet0/0
•FE0/1 is identified as interface FastEthernet0/1
In the factory default configuration, the routed interfaces are disabled and have no IP address assigned. Since the interfaces are disabled, the
Ethernet ports will not link. To enable the ports and set IP addresses, connect to the router via the serial console and configure the interfaces.
Refer to the Software Configuration chapter later in this manual for details.
Switched Ethernet Ports (FE0/2, FE0/3, & FE0/4)
The switched ports are traditionally used for the LAN interface of the system. FE0/2 is used internally in the IDAN system for the RTD
StackNETTM interface. FE0/3 & FE0/4 are available on the IDAN front panel for external connections. The switched ports are Layer 2
interfaces, and do not have an IP address assigned directly. However, the ports may be assigned to VLANs, and IP addresses may be
assigned to VLAN interfaces. In the Cisco IOS operating system, these ports are identified as follows:
•FE0/2 is identified as interface FastEthernet0/2
Cisco 5915
Embedded Services Router
Board
LAN25E5915
Interface Board
PCI Bus (power only)
PCIe Bus (Power Only)
PCI Bus (power only)
Ethernet
Serial Console
Power
LED signals
Factory Default
Routed Ethernet Ports
FE0/0 & FE0/1
Switched Ethernet Ports
FE0/2, FE0/3, & FE0/4
Console Port
Status LEDs
CLR Button

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•FE0/3 is identified as interface FastEthernet0/3
•FE0/4 is identified as interface FastEthernet0/4
By default, the switched interfaces are enabled and assigned to VLAN 1, but the VLAN 1 interface has no IP address assigned. To set an IP
address, connect to the router via the serial console and configure the VLAN 1 interface. Refer to the Software Configuration chapter later in
this manual for details.
Console Port
The serial console port is primarily used for initial router configuration and troubleshooting. In Cisco IOS, it is identified as con0.
The Console port may be connected to the RS-232 serial port on an RTD cpuModule, laptop, or a desktop PC. If the computer does not have
a serial port available, a USB to RS-232 serial adapter may be used. Connecting to the console will require terminal emulation software such
as PuTTY, TeraTerm, HyperTerminal, or similar. After installing the software, configure the serial connection as follows:
•Baud Rate = 9600
•Data Bits = 8
•Parity = None
•Stop Bits = 1
•Flow Control = None
NOTE: The above serial port settings are the factory defaults. It is possible
for the user to change them in the Cisco IOS configuration. If these
settings are changed on the router, they must be changed in the
terminal emulator software as well. If the settings are changed, be
sure to write them down. It may be very difficult to access the serial
console again if the settings are forgotten!
If the console is connected before power is applied to the router, the initial boot messages may be seen. It is also possible to connect the serial
console while the router is powered, however the initial boot messages will be missed. If the serial console is connected after the router is
booted, it may be necessary to press Enter a few times before any text is displayed.
Figure 11: Serial Console Typical Boot Messages
After the router is booted, it may be necessary to press Enter a few times before the command prompt (or login prompt) is displayed. The
default command prompt is Router>.

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Figure 12: Serial Console Default Command Prompt
NOTE: By default, no password is required for the serial console.
Customers are strongly urged to set a password immediately after
logging in. Refer to the Software Configuration chapter later in this
document for details.
Status LEDs
The following status LEDs are available on the front panel of the IDAN-IDC5915:
1. RJ-45 Port LEDs - Each port provides a single Green Link/Activity LED, which indicates status of the interfaces:
a. Off = No Ethernet link detected, or the interface is disabled in the Cisco IOS configuration.
b. Green Flashing = Ethernet activity detected.
c. Green Solid = Ethernet link detected.
2. SYS LED –Green/Red LED combines the System and Temperature LED signals from the Cisco 5915 board:
a. Off = No Power. When power is applied, it takes approximately 10 seconds before SYS will illuminate.
b. Green Flashing = System is booting (ROMMON boot loader). The router typically takes 1-2 minutes to boot, depending
on the configuration. (If the router does not boot in a timely manner, it may be waiting at a ROMMON prompt due to flash
corruption or a similar issue. If so, this may be debugged via the serial console.)
c. Green Solid = System is booted and running normally.
d. Green/Red Flashing = The board has exceeded the temperature threshold of +85OC. If the system is not immediately
cooled down, it will reboot within one minute.
3. DEF LED - Green LED indicates whether or not the Factory Default (declassify) signal has been triggered via the CLR button:
a. Off = Factory Default not initiated
b. Green Flashing = CLR has been pressed, Factory Default initiated, erasure in process.
c. Green Solid = Erasure complete, all interfaces disabled. Router is now in a hung state and must be power cycled.
CLR Button
The CLR button triggers the Factory Default feature, which allows for quick erasure of the router’s onboard flash memory. This feature is
particularly useful for secure environments where it may be necessary to rapidly remove sensitive information from the router. The CLR button
is not enabled by default. It must be configured in Cisco IOS via the service declassify configuration command.
To initiate Factory Defaults (if configured): While the router is booted (SYS LED is solid green), press and release the CLR button. If a
serial console it attached, one can watch the progress messages as the memory is erased. Once the erasure is complete, the DEF LED will be
solid green, all Ethernet interfaces will be disabled, and the router will hang. To use the router again, it must be power cycled, and the
configuration and/or Cisco IOS image must be reloaded.

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Figure 13: Serial Console After Pressing CLR