Specifications

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Cisco 7100 Series VPN Router Installation and Configuration Guide
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Chapter 4 Performing a Basic Startup Configuration
Configuring a Router
Perform a basic interface configuration using the procedure below.
Note Additional configuration commands may be required, depending on your system requirements and the
protocols you plan to route on the interface.
At any time, you can exit the privileged level and return to the user level by entering disable at the
prompt as follows:
Router# disable
Step 1 At the Router (config)# prompt, enter the interface type slot/port command to enter the interface
configuration mode. In this example, the serial port 0 is configured:
Router(config)# interface serial 1/0
Router(config-if)#
You can now enter any changes to the configuration.
Note To see a list of the configuration commands available to you, enter ? at the prompt or press the Help key
while in configuration mode.
Step 2 Specify the IP address. The following example uses an IP address of 10.1.1.30:
Router(config-if)# ip address 10.1.1.30 255.0.0.0
Step 3 Change the default settings or configure other features on the interface as needed.
The following example shows you how to set the clock source to internal (the default is line) and reduce
the effective bandwidth (the default is 44210 kbps):
Router(config-if)# clock source internal
Router(config-if)# dsu bandwidth 16000
Note The local port configuration must match the remote port configuration. For example, if you reduce the
effective bandwidth to 16000 on the local port, you must do the same on the remote port.
Table 4-3 T3 Interface Defaults
Attribute Default Value Command
Clock source Line clock source
DSU bandwidth 44210 dsu bandwidth kbps (22 to 44210)
DSU mode 0 dsu mode {0 | 1 | 2}
Scramble Not enabled scramble
no scramble
Framing C-bit framing {c-bit }| m13 | bypass}
Cable length 10 feet cablelength feet (0 to 450)
CRC 16 bits crc size (16 or 32 bits)