Cisco Systems C819HG4GVK9 Interface Enablement Configuration Examples, No physical-layer

Chapter 8 Configuring the Serial Interface

Configuration Examples

When placed in asynchronous mode, low-speed serial interfaces support all commands available for standard asynchronous interfaces. The default is synchronous mode.

Note When you use this command, it does not appear in the output of the show running-configand show startup-configcommands because the command is a physical-layer command.

To return to the default mode (synchronous) of a low-speed serial interface on a Cisco 2520 through Cisco 2523 router, use the following command in interface configuration mode.

SUMMARY STEPS

1.no physical-layer

DETAILED STEPS

	Command or Action	Purpose
Step 1	no physical-layer	Returns the interface to its default mode, which is
		synchronous.
	Example:
	Router(config-if)# no physical-layer

Configuration Examples

Interface Enablement Configuration: Examples

The following example illustrates how to begin interface configuration on a serial interface. It assigns PPP encapsulation to serial interface 0.

interface serial 0 encapsulation ppp

The same example on the router, assigning PPP encapsulation to port 0 in slot 1, requires the following commands:

interface serial 1/0 encapsulation ppp

The following example shows how to configure the access server so that it will use the default address pool on all interfaces except interface 7, on which it will use an address pool called lass:

ip address-pool local

ip local-pool lass 172.30.0.1 async interface

interface 7

peer default ip address lass

	Cisco 819 Series Integrated Services Routers Software Configuration Guide
OL-23590-02		8-19