Cisco 800M Series Configuration Manual page 8

How to Configure Serial Interfaces
Specifying a Synchronous Serial Interface
To specify a synchronous serial interface and enter interface configuration mode, use the following
commands in global configuration mode.
Command
Router(config)# interface serial wic/slot/port
Example:
Router# interface serial 0/0/0
Specifying Synchronous Serial Encapsulation
By default, synchronous serial lines use the High-Level Data Link Control (HDLC) serial encapsulation
method, which provides the synchronous framing and error detection functions of HDLC without
windowing or retransmission. The serial interfaces support the following serial encapsulation methods:
•
•
•
To define the encapsulation method, use the following command in interface configuration mode.
-f
Command
Router(config-if)# encapsulation {hdlc | frame-relay | ppp
}
Example:
Router(config-if)# encapsulation ppp
Encapsulation methods are set according to the type of protocol or application you configure in the
Cisco IOS software.
For configuration examples, see the
Configuring Asynchronous Serial Interface
You can use the physical-layer async command to change the interface mode from the default
synchronous mode to asynchronous mode
SUMMARY STEPS
1.
Cisco 800M Series Integrated Services Routers Software Configuration Guide
46
HDLC
Frame Relay
PPP
physical-layer async
Purpose
Specifies the serial interface and enters interface configuration
mode.
Purpose
Configures synchronous serial encapsulation.
"Configuration Examples" section on page
Chapter 4 Configuring the Serial Interface
4-47.