HP J3138A, Installation Manual

Page: 45 / 104

3-15
Configuring the HP AdvanceStack Internet Router
Configuring ISDN
C
o
nfi
gurat
ion
Saving Configuration Changes
Any time you make changes to the router configuration, you must save the
changes to memory because if you do not they will be lost if there is a system
reload or power outage. There are two types of configuration files: the running
(current operating) configuration and the startup configuration. The running
configuration is stored in RAM; the startup configuration is stored in NVRAM.
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
C A U T I O N
This command sequence will erase the entire router configuration in RAM and
NVRAM and reload the router.
Configuring ISDN
This section describes a recommended 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 Example ISDN
Configuration during this procedure.