Configuring Dial Backup And Remote Management Through The Isdn S/T Port - Cisco CISCO851-K9 - 851 Integrated Services Router Configuration Manual

Configuring Dial Backup and Remote Management Through the ISDN S/T Port

Configuring Dial Backup and Remote Management Through the
ISDN S/T Port
Cisco 876 and Cisco 878 routers can use the ISDN S/T port for remote management. With an advanced
enterprise (c870-adventerprisek9-mz) image, a Cisco 876 router can also use the ISDN S/T port for
dial backup.
Figure 13-2
management access and backup for the primary WAN line. In
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. In
dial backup link goes directly from the Cisco router to the ISDN switch.
Figure 13-2 Dial Backup Through CPE Splitter, DSLAM, and CO Splitter
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Cisco 850 Series and Cisco 870 Series Access Routers Software Configuration Guide
13-16
and Figure 13-3 show two typical network configurations used to provide remote
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1
B
C
Cisco 876 or Cisco 878 router
DSLAM
ATM aggregator
ISDN switch
ISDN
ISDN peer router
Web server
Administrator
Chapter 13
A
3
ATM
network
4
6
5
A
Primary DSL interface
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
C
Administrator remote management 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
— —
Configuring Dial Backup and Remote Management
Figure 13-2, the dial backup link goes
Figure
Internet
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13-3, the
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