Cisco 2921 User Manual

110
Cisco 3900 Series, Cisco 2900 Series, and Cisco 1900 Series Integrated Services Routers Generation 2 Software Configuration Guide
OL-20696-04
Chapter Configuring Backup Data Lines and Remote Management
Configuring Dial Backup and Remote Management Through the Console Port or Auxiliary Port
To configure dial backup and remote management on Cisco 3900 series, Cisco 2900 series, and Cisco
1900 series ISRs, follow these steps, beginning in global configuration mode.
SUMMARY STEPS
1. ip name-server server-address
2. ip dhcp pool name
3. exit
4. chat-script script-name expect-send
5. interface type number
6. exit
7. interface type number
8. dialer watch-group group-number
9. exit
10. ip nat inside source {list access-list-number} {interface type number | pool name} [overload]
11. ip route prefix mask {ip-address | interface-type interface-number [ip-address]}
12. access-list access-list-number {deny | permit} source [source-wildcard]
13. dialerwatch-list group-number {ip ip-address address-mask | delay route-check initial seconds}
14. line [aux | console | tty | vty] line-number [ending-line-number]
15. modem enable
16. exit
17. line [aux | console | tty | vty] line-number [ending-line-number]
18. flowcontrol {none | software [lock] [in | out] | hardware [in | out]}
DETAILED STEPS
Command Purpose
Step 1
ip name-server server-address
Example:
Router(config)# ip name-server 192.168.28.12
Router(config)#
Enters your ISP DNS IP address.
Tip You may add multiple server
addresses if available.
Step 2
ip dhcp pool name
Example:
Router(config)# ip dhcp pool 1
Router(config-dhcp)#
Creates a DHCP address pool on the router
and enters DHCP pool configuration
mode. The name argument can be a string
or an integer.
Configure the DHCP address pool. For
sample commands that you can use in
DHCP pool configuration mode, see the
“Example” section on page 113.

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