Name: Cisco 2911
Brand: Cisco
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C-5

Cisco 3900 Series, Cisco 2900 Series, and Cisco 1900 Series Integrated Services Routers Generation 2 Software Configuration Guide

Appendix C Using ROM Monitor

How to Use the ROM Monitor—Typical Tasks

Troubleshooting Tips

The Break key sequence varies, depending on the software on your PC or terminal. See the Standard

Break Key Sequence Combinations During Password Recovery tech note.

What to Do Next

• Proceed to the “Displaying Commands and Command Syntax in ROM Monitor Mode (?, help, -?)”

section on page C-7.

• If you use the Break key sequence to enter ROM monitor mode when the router would otherwise

have booted the system image, you can exit ROM monitor mode by doing one of the following:

–

Enter the i or reset command, which restarts the booting process and loads the system image.

–

Enter the cont command, which continues the booting process and loads the system image.

Setting the Configuration Register to Boot to ROM Monitor Mode

This section describes how to enter ROM monitor mode by setting the configuration register to boot to

ROM monitor mode at the next system reload or power-cycle. For more information about the

configuration register, see the Changing the Configuration Register Settings document at:

http://www.cisco.com/en/US/docs/routers/access/1800/1841/software/configuration/guide/b_creg.html

Caution Do not set the configuration register by using the config-register 0x0 command after you have set the

baud rate. To set the configuration register without affecting the baud rate, use the current configuration

(rightmost) number with a 0 in the configuration register command.

SUMMARY STEPS

1. enable

2. configure terminal

3. config-register 0x0

4. exit

5. write memory

6. reload

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General

Ethernet LAN	Yes
Cabling technology	10/100/1000Base-T(X)
Networking standards	IEEE 802.1Q, IEEE 802.1ag, IEEE 802.3, IEEE 802.3ab, IEEE 802.3af, IEEE 802.3ah, IEEE 802.3u
Ethernet LAN data rates	10, 100, 1000 Mbit/s
Ethernet interface type	Gigabit Ethernet
DHCP client	-
Routing protocols	BGP, EIGRP, OSPF
Supported protocols	IPv4, IPv6, IS-IS, IGMPv3, PIM SM, SSM, DVMRP, IPSec, GRE, BVD, MPLS, L2TPv3, PPP, MLPPP, MLFR, HDLC, RS-232, RS-449, X.21, V.35, EIA-530, PPPoE, ATM
USB version	2.0
RS-232 ports	1
Expansion slots	4 x EHWIC 2 x DSP 1 x ISM
USB ports quantity	2
Ethernet LAN (RJ-45) ports	3
Firewall security	Cisco IOS
Input current	2.2 A
AC input voltage	100 - 240 V
Power source type	AC
AC input frequency	47 - 63 Hz
Power consumption (typical)	50 W
Product color	Black
Rack capacity	2U
Operating altitude	0 - 4000 m
Non-operating altitude	0 - 4570 m
Storage temperature (T-T)	-40 - 80 °C
Operating temperature (T-T)	0 - 40 °C
Storage relative humidity (H-H)	5 - 95 %
Operating relative humidity (H-H)	5 - 85 %
Safety	UL 60950-1, CAN/CSA C22.2 No. 60950-1, EN 60950-1, AS/NZS 60950-1, IEC 60950-1
Electromagnetic compatibility	47 CFR, ICES-003, EN55022, CISPR22, AS/NZS 3548, VCCI V-3, EN 300-386, EN 61000, EN 55024, CISPR 24EN50082-1