Cisco 2921 User Manual

119
Cisco 3900 Series, Cisco 2900 Series, and Cisco 1900 Series Integrated Services Routers Generation 2 Software Configuration Guide
Chapter Configuring Backup Data Lines and Remote Management
Configuring Data Line Backup and Remote Management Through the ISDN S/T Port
Step 7
interface dialer dialer-rotary-group-number
Example:
Router(config)# interface dialer 0
Router(config-if)#
Creates a dialer interface (numbered 0 to 255) and
enters interface configuration mode.
Step 8
ip address negotiated
Example:
Router(config-if)# ip address negotiated
Router(config-if)#
Specifies that the IP address for the interface is
obtained through PPP/IPCP (IP Control Protocol)
address negotiation. The IP address is obtained
from the peer.
Step 9
encapsulation encapsulation-type
Example:
Router(config-if)# encapsulation ppp
Router(config-if)#
Sets the encapsulation type for the interface.
Step 10
dialer pool number
Example:
Router(config-if)# dialer pool 1
Router(config-if)#
Specifies the dialer pool to be used.
In the example, the dialer pool 1 setting associates
the dialer 0 interface with the BRI0 interface
because the BRI0 dialer pool-member value is 1.
Step 11
dialer string dial-string# [:isdn-subaddress]
Example:
Router(config-if)# dialer string 384040
Router(config-if)#
Specifies the telephone number to be dialed.
Step 12
dialer-group group-number
Example:
Router(config-if)# dialer group 1
Router(config-if)#
Assigns the dialer interface to a dialer group
(1–10).
Step 13
exit
Example:
Router(config-if)# exit
Router(config)#
Exits dialer interface configuration mode and
enters global configuration mode.
Step 14
dialer-list dialer-group protocol protocol-name
{permit | deny | list access-list-number |
access-group}
Example:
Router(config)# dialer-list 1 protocol ip
permit
Router(config)#
Creates a dialer list for packets of interest to be
forwarded through the specified interface dialer
group.
In the example, dialer-list 1 corresponds to
dialer-group 1.
For details about this command and additional
parameters that can be set, see Cisco IOS Dial
Technologies Command Reference.
Command Purpose

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