To save the gateway configuration, save it to NVRAM. Refer to the "Saving Configuration Changes" section on
Tip
page 57.
For comprehensive information about how to implement a Cisco AAA-based security environment, see the relevant
Note
documents at Cisco Product Documentation > Network Security > Cisco IOS Technology-Specific Security Features.
Configure Basic Dial Access
To commission a basic dial access service perform the following tasks:
• Create two loopback interfaces.
• Bring up the Fast Ethernet interface.
• Add an IP route to the default gateway.
Enter global configuration mode. You are in global configuration mode when your prompt changes to
Step 1
Gateway(config)#
Gateway# configure terminal
Enter configuration commands, one per line. End with CNTL/Z.
Gateway(config)#
Assign the IP addresses as in the following example, and create an IP route to the default gateway:
Step 2
Gateway(config)# interface loopback 0
Gateway(config-if)# ip address 172.22.99.1 255.255.255.255
Gateway(config-if)# exit
Gateway(config)# interface loopback 1
Gateway(config-if)# ip address 172.22.90.1 255.255.255.0
Gateway(config-if)# exit
Gateway(config)# interface FastEthernet 0/0
Gateway(config-if)# ip address 172.28.186.55 255.255.255.240
Gateway(config-if)# no shutdown
Gateway(config-if)# exit
Gateway(config)# ip route 0.0.0.0 0.0.0.0 172.28.186.49
In this example:
• Interface loopback 0—Identifies with a unique and stable IP address. One unique IP address from a common block of
addresses is assigned to each device in the IP network. This technique makes security-filtering easy for the Network
Operations Center (NOC). One class C subnet used for device identification can support 254 distinct devices with unique
loopback addresses.
• Interface loopback 1—Hosts a pool of IP addresses for the remote nodes. In this way, one route, instead of 254 routes, is
summarized and propagated to the backbone. Pick the IP address for loopback 1 from the range of addresses that you will
assign to the local address pool.
Return to privileged EXEC mode:
Step 3
Gateway(config)# Ctrl-Z
Gateway#
38
.