Cisco 1941 User Manual

97
Cisco 3900 Series, Cisco 2900 Series, and Cisco 1900 Series Integrated Services Routers Generation 2 Software Configuration Guide
Configuring Backup Data Lines and Remote
Management
Cisco 3900 series, Cisco 2900 series, and Cisco 1900 series integrated services routers (ISRs) support
remote management and backup data connectivity by means of ISDN.
The following sections describe how to configure backup data lines and remote management:
• Configuring Backup Interfaces, page 97
• Configuring Dial Backup and Remote Management Through the Console Port or Auxiliary Port,
page 109
• Configuring Data Line Backup and Remote Management Through the ISDN S/T Port, page 116
• Configuring Third-Party SFPs, page 121
Configuring Backup Interfaces
This section contains the following topics:
• Configuring the Backup Interface, page 97
• Configuring Gigabit Ethernet Failover Media, page 99
• Configuring Cellular Dial-on-Demand Routing Backup, page 101
Configuring the Backup Interface
When the router receives an indication that the primary interface is down, the backup interface is
enabled. After the primary connection is restored for a specified period, the backup interface is disabled.
Note For dial-on-demand routing (DDR) backup, even if the backup interface comes out of standby mode, the
router does not enable the backup interface unless the router receives the traffic specified for that backup
interface.
To configure the router with a backup interface, follow these steps, beginning in global configuration
mode.

Cisco 1941 Specifications

General

Product Type	Router
Product Series	1900
Model	1941
Connectivity Technology	Wired
Data Link Protocol	Ethernet, Fast Ethernet, Gigabit Ethernet
Flash Memory	256 MB
Power Supply	Internal power supply
Power	AC 120/230 V (50/60 Hz)
Operating System	Cisco IOS
Product Name	Cisco 1941
Form Factor	Rack-mountable
Network/Transport Protocol	IPSec, L2TP, PPPoE, PPPoA
Remote Management Protocol	SNMP, Telnet, SSH, HTTP, HTTPS
Features	Firewall protection, VPN support, VLAN support
Interfaces	2 x 10/100/1000Base-T Ethernet WAN, 2 x USB 2.0
Expansion Slots	2 x EHWIC 1 x ISM slot
Wireless LAN	No
RAM	512 MB (installed) / 768 MB (max)