Specifications

Configuring and Managing Cisco Access Servers and Dial Shelves
How to Configure Dial Shelves
DC-116
Cisco IOS Dial Technologies Configuration Guide
If you are booting the router shelf from Flash memory, use the following commands beginning in EXEC
mode:
Configuring Redundant DSC Cards
The Redundant Dial Shelf Controller feature consists of two DSC cards on a Cisco AS5800 dial shelf.
The DSC cards provide clock and power control to the dial shelf cards. Each DSC card provides the
following:
• Master clock for the dial shelf
• Fast Ethernet link to the router shelf
• Environmental monitoring of the feature boards
• Bootstrap images on start-up for the feature boards
The Redundant Dial Shelf Controller feature is automatically enabled when two DSC cards are installed.
DSC redundancy is supported with Cisco AS5800 software at the Dial Shelf Interconnect Protocol
(DSIP) level.
This feature enables a Cisco AS5800 dial shelf to use dual DSCs for full redundancy. A redundant
configuration allows for one DSC to act as backup to the active card, should the active card fail. This
increases system availability by preventing loss of service. The redundant DSC functionality is robust
under high loads and through DSC or software crashes and reloads. The redundant DSC functionality is
driven by the following events:
• User actions
• Control messages
• Timeouts
Command Purpose
Step 1
Router# copy running-config tftp
or
Router# copy startup-config tftp
Saves your current (latest) configuration to a server.
Step 2
Router# configure terminal
Begins global configuration mode.
Step 3
Router(config)# shelf-id number router-shelf
Configures the router shelf ID.
Step 4
Router(config)# shelf-id number dial-shelf
Configures the dial shelf ID.
Step 5
Router(config)# exit
Exits global configuration mode.
Step 6
Router> copy running-config startup-config
Saves your configuration. This step is optional. If this step
is skipped, type “No” at the “save configuration” prompt.
Step 7
Router> show version
Allows verification that the correct shelf number will be
changed after the next reload.
Edit the configuration file saved in Step 1.
Step 8
Router> copy tftp startup-config
Copies the edited configuration to NVRAM on the
Cisco AS5800.
Step 9
Router# reload components all
Instructs the DSC (or DSCs in a redundant configuration) to
be reloaded at the same time as a reload on the router shelf.