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Chapter 4
Configuring the PA-A2 ATM CES Port Adapter
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For the commands that follow, you need to be in interface configuration mode. To enter interface
Note
configuration mode, use the interface atm command, followed by the interface address of the ATM
interface you plan to configure.
Setting the MTU Size
Each ATM interface has a default maximum packet size or maximum transmission unit (MTU) size. On
the PA-A2 ATM CES port adapter, this number defaults to 4470 bytes, the range being 64 through
9188 bytes. To set the maximum MTU size, enter the following command in interface configuration
mode:
Router(config-if)# mtu bytes
This command is documented in the Configuration Fundamentals Command Reference.
Note
Configuring an ATM Interface for Local Loopback
To configure an ATM interface for local loopback (useful for checking that the PA-A2 ATM CES
port adapter is working by looping the transmit data back to the receive data), use the following
command:
Router(config-if)# loopback diagnostic
Router(config-if)# no loopback diagnostic
The no form of the command turns off local loopback.
Configuring an ATM Interface for External Loopback
To configure an ATM interface for external loopback (useful for checking that the PA-A2 ATM CES
port adapter is working by looping the receive data back to the transmit data), use the following
command:
Router(config-if)# loopback line
Router(config-if)# no loopback line
The no form of the command turns off external loopback.
Checking the Configuration
After configuring the new interface, use the show commands to display the status of the new interface
or all interfaces, and use the ping and loopback commands to check connectivity. This section includes
the following subsections:
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OL3460-01
Configuring an ATM Interface for External Loopback, page 4-15
Using show Commands to Verify the New Interface Status, page 4-16
Using the ping Command to Verify Network Connectivity, page 4-18
Using loopback Commands, page 4-19
PA-A2 ATM CES Port Adapter Installation and Configuration
Checking the Configuration
4-15
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