
Configuring the 
DETAILED STEPS
| 
 | Command or Action | Purpose | |
| Step 1 | 
 | 
 | 
 | 
| enable | 
 | Enter IOS exec mode. | |
| Step 2 | 
 | 
 | |
| configure terminal | Enter IOS configuration from terminal | ||
| 
 | 
 | 
 | mode. | 
| Step 3 | 
 | 
 | |
| interface loopback  | Create a loopback interface 0 on the | ||
| 
 | Router (config)# interface loopback 0 | router. | |
| 
 | 
 | ||
| 
 | Router  | 
 | |
| Step 4 | 
 | 
 | |
| ip address  | Set a bogus address on the loopback | ||
| 
 | 
 | 
 | interface. In the example, interface | 
| 
 | Example: | 
 | loopback0 is assigned with an address | 
| 
 | 10.1.1.1/24. | ||
| Step 5 | 
 | 
 | 
 | 
| no shutdown | 
 | Enable the loopback interface. | |
| Step 6 | 
 | 
 | 
 | 
| exit | 
 | Exit from interface configuration mode | |
| 
 | 
 | 
 | to the global configuration mode. | 
| 
 | Example: | 
 | 
 | 
| 
 | 
 | ||
| 
 | Router(config)# | 
 | |
| Step 7 | 
 | 
 | |
| interface  | Enter the IOS interface configuration | ||
| 
 | (or for the  | mode for the  | |
| 
 | interface. | ||
| 
 | interface  | ||
| 
 | 
 | ||
| Step 8 | 
 | 
 | |
| ip unnumber loopback <number> | Borrow the address that was set to the | ||
| 
 | 
 | 
 | loopback interface in Step 4. | 
| 
 | Example: | 
 | 
 | 
| 
 | Router  | 
 | |
| Step 9 | 
 | 
 | 
 | 
| no shutdown | 
 | Bring up the  | |
| 
 | 
 | 
 | interface. | 
| Step 10 | 
 | 
 | |
| Set  | |||
| 
 | (or for the  | External interface. | |
| 
 | 
 | ||
| 
 | Example: | 
 | 
 | 
| 
 | Router  | 
 | |
| 
 | 209.165.201.2 | 255.255.255.224 | 
 | 
| 
 | 
 | 
 | 
 | 
Cisco Branch Routers Series Network Analysis Module 
| 
 | 29 | 
 | |
| 
 | 
 | 
