Software Configuration Guide for the Cisco 5900 Embedded Services Routers

Configuring the Interfaces

---

This chapter provides the following major sections to describe how to configure and verify a router-to-modem interface.

• Using the Interface Command
• Configuring Interfaces
• Monitoring and Maintaining Interfaces

Note For complete command syntax and usage, see Appendix A, “Command Reference.”

Using the Interface Command

The following general instructions apply to all interface-configuration processes:

Step 1 At the privileged EXEC prompt, enter the configure terminal command to enter global configuration mode:

Step 2 In global configuration mode, enter the interface command. Identify the interface type and the number of the connector on the interface card. The following example shows how to select a fast Ethernet interface of 0:

Note You do not need to add a space between the interface type and interface number. For example, in the preceding line you can specify either fastEthernet0/0 or fastEthernet 0/0.

Step 3 Interface numbers are assigned at the factory at the time of installation. Enter the show interfaces EXEC command to see a list of all interfaces installed on your router. A report is provided for each interface that your router supports, as shown in this display:

Step 4 Follow each interface command with the interface-configuration commands your particular interface requires. The commands you enter define the protocols and applications that run on the interface. The commands are collected and applied to the interface command until you enter another interface command or press Ctrl-Z to exit interface configuration mode and return to privileged EXEC mode.

Step 5 You can use the exit command to exit interface configuration mode and return to global configuration mode.

Step 6 After you configure an interface, you can check the status of the interface by using the EXEC show commands listed in the “Monitoring and Maintaining Interfaces” section.

Configuring Interfaces

The following subsections describe interface configuration procedures:

• Configuring an IP Address
• Adding a Description for an Interface

Monitoring and Maintaining Interfaces

The following sections describe how to monitor and maintain the interfaces:

• Monitoring Interface and Controller Status
• Clearing and Resetting the Interface Counters

Clearing and Resetting the Interface Counters

To clear the interface counters shown with the show interfaces command, enter the following command:

 

Command	Purpose
Router#clear counters { type interface }	Clears interface counters.

This example shows how to clear and reset the counters on Gigabit Ethernet interface 0/0:

Router#clear counters gigabitEthernet 0/0

Clear "show interface" counters on this interface [confirm] y

Router#

*Sep 30 08:42:55: %CLEAR-5-COUNTERS: Clear counter on interface gigabitEthernet0/0

by vty1 (171.69.115.10)

Router#

 

The clear counters command (without any arguments) clears all the current interface counters from all interfaces.

---

Note The clear counters command does not clear counters retrieved with SNMP; it clears only those counters displayed with the EXEC show interfaces command.

---