Cisco 2921 User Manual

D-5
Cisco 3900 Series, Cisco 2900 Series, and Cisco 1900 Series Integrated Services Routers Generation 2 Software Configuration Guide
Appendix D Changing the Configuration Register Settings
Displaying the Configuration Register Settings
Step 9 Save the configuration changes to NVRAM:
Router# copy run start
The new configuration register settings are saved to NVRAM, but they do not take effect until the next
router reload or power cycle.
Displaying the Configuration Register Settings
To display the configuration register settings that are currently in effect and the settings that will be used
at the next router reload, enter the show version command in privileged EXEC mode.
The configuration register settings are displayed in the last line of the show version command output:
Configuration register is 0x142 (will be 0x142 at next reload)
Configuring the Console Line Speed (Cisco IOS CLI)
The combined setting of bits 5, 11, and 12 determines the console line speed. You can modify these
particular configuration register bits only from the ROM monitor.
To change the configuration register using the ROM monitor, see Appendix C, “Using ROM Monitor”.
To configure the console line speed from the Cisco IOS command-line interface, complete the following
steps.
SUMMARY STEPS
1. enable
2. configure terminal
3. line console 0
4. speed baud
DETAILED STEPS
Command or Action Purpose
Step 1
enable
Example:
Router> enable
Password: password
Router#
Enables privileged EXEC mode. Enter your password if
prompted.
Step 2
configure terminal
Example:
Router# configure terminal
Router(config)#
Enters global configuration mode.

Cisco 2921 Specifications

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
Product color	Black
Rack capacity	2U
USB version	2.0
RS-232 ports	1
USB ports quantity	2
Ethernet LAN (RJ-45) ports	3
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
Firewall security	Cisco IOS
Operating altitude	0 - 3000 m
Non-operating altitude	0 - 4570 m
Storage temperature (T-T)	-40 - 70 °C
Operating temperature (T-T)	0 - 40 °C
Storage relative humidity (H-H)	5 - 95 %
Operating relative humidity (H-H)	10 - 85 %
AC input voltage	100 - 240 V
Power source type	AC
AC input frequency	47 - 63 Hz
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

Weight and Dimensions

Depth	469.9 mm
Width	438.2 mm
Height	88.9 mm
Weight	13200 g