Cisco 3925 User Manual

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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 Data Line Backup and Remote Management Through the ISDN S/T Port
Configuring Data Line Backup and Remote Management
Through the ISDN S/T Port
This section contains the following topics:
• Configuring ISDN Settings, page 117
• Example, page 120
Cisco 3900 series routers can use the ISDN S/T port for remote management. Figure 2 and Figure 3
show two typical network configurations that provide remote management access and backup for the
primary WAN line.
Figure 2 shows a dial backup link that goes through a customer premises equipment (CPE) splitter, a
digital subscriber line access multiplexer (DSLAM), and a central office (CO) splitter before connecting
to the ISDN switch.
Figure 2 Data Line Backup Through CPE Splitter, DSLAM, and CO Splitter
1 Cisco 3900 series router A Primary DSL interface, FE interface (Cisco 3900
series router)
2 DSLAM B Dial backup and remote management through the
ISDN interface (ISDN S/T port); serves as a
failover link when the primary line goes down
3 ATM aggregator
4 ISDN switch
5 ISDN C Provides administrator with remote management
capability through the ISDN interface when the
primary DSL link is down; serves as dial-in access
to allow changes or updates to Cisco IOS
configuration
6 ISDN peer router
7 Web server
8 Administrator
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AT M
network
Internet
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Cisco 3925 Specifications

General

Product Type	Router
Form Factor	Rack-mountable
Data Link Protocol	Ethernet, Fast Ethernet, Gigabit Ethernet
Connectivity Technology	Wired
Power	AC 120/230 V (50/60 Hz)
Redundant Power Supply	Optional
Routing Protocol	OSPF, IS-IS, BGP, EIGRP, PIM
Network/Transport Protocol	IPSec
Remote Management Protocol	SNMP, Telnet, SSH, HTTP
Encryption Algorithm	DES, Triple DES, AES
Flash Memory	256 MB
Weight	11.5 kg
Interfaces	2 x SFP (mini-GBIC)
Power Source	Internal power supply
Authentication Method	RADIUS, TACACS+, LDAP
Compliant Standards	IEEE 802.1Q, IEEE 802.3af
Operating Temperature	0 to 40 °C
Operating Humidity	5% to 85% (non-condensing)
Dimensions (WxDxH)	44.5 x 47.2 x 8.9 cm