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Configuring ISDN
To display the current running configuration, enter the show running-config command.
Enter the copy running-config startup-config command to save the current running
configuration to the startup configuration file in NVRAM.
Router> enable
Router# copy running-config startup-config
To display the startup configuration, enter the show startup-config command. Enter the
copy startup-config running-config command to write the startup configuration to the
running configuration:
Router> enable
Router# copy startup-config running-config
To erase both configuration files (and start over), enter the write erase and reload
commands:
Router> enable
Router# write erase
Router# reload
Caution
NVRAM and reload the router.
Configuring ISDN
This section describes a typical ISDN configuration for one or two B channels. In the
examples that follow, the BRI port is configured for IP routing, Challenge Handshake
Authentication Protocol (CHAP), and Point-to-Point Protocol (PPP) encapsulation.
For your reference, an example configuration follows in the next section, "Example ISDN
Configuration." You may want to refer to it during this procedure.
4-18 Router Installation and Configuration Guide
This command sequence will erase the entire router configuration in RAM and
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Troubleshooting
