Cisco Systems 12000 series Configuring and Troubleshooting Interfaces, Initial Configuration

Configuring and Troubleshooting Interfaces

Configuring and Troubleshooting Interfaces

The following sections provide procedures for configuring and troubleshooting the ATM line card.

•Initial Configuration, page 32

•Configuring an Interface, page 32

•Using show Commands to Check Status, page 34

•ATM Configuration Example, page 35

•Advanced Line Card Troubleshooting, page 36

•Line Card Diagnostics Using Cisco IOS Software Release 12.0(22)S and Later, page 40

•Line Card Diagnostics Using Cisco IOS Software Releases Prior to 12.0(22)S, page 42

Initial Configuration

To display current port configuration information, use the show running-configcommand. During power-on, the interface on a new ATM line card is shut down. To enable the interface, you must enter a no shutdown command in configuration mode. When the ATM line card is enabled (taken out of shutdown) with no additional configuration commands applied, the default interface configuration file parameters listed in Table 13 are used.

Table 13	ATM Line Card Default Configuration Values
Parameter		Configuration File Entry	Default Value
Maximum transmission unit (mtu)		[no] mtu bytes	4470 bytes
Maximum numbers of virtual circuits		atm maxvc	2047
Loopback		[no] loopback [diagnostic line]	no loopback
Internal clock		atm clock internal	line clock:
			no atm clock internal
SONET framing		atm sonet stm-4 or	SONET framing:
		atm sonet stm-1	no atm sonet stm-4
			no atm sonet stm-1

To enter a no shutdown command for the ATM line card interface or to change the configuration of the interface, you must enter configuration mode by using the configure privileged EXEC command.

Configuring an Interface

After you verify that the new ATM line card is installed correctly, use the configure command to configure the new interface. Be prepared with the information that you will need, such as the interface IP address.

The following procedure is for creating a basic configuration—enabling an interface and specifying IP routing. You might also need to enter other configuration subcommands, depending on the requirements for your router configuration.

(For descriptions of configuration subcommands and the configuration options available, refer to the appropriate software publications in the “Cisco IOS Software Release Requirements” section on page 2.)

ATM Line Card Installation and Configuration

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