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Configuring the IDSL Router
Change to interface command mode. For example:
Step 12
router(config)# interface ethernet0
router(config-if)#
Enter the IP address and subnet mask for the LAN. For example:
Step 13
router(config-if)# ip address 192.168.1.1 255.255.255.0
Enable Network Address Translation (NAT) on your LAN. The inside network address is not directly
Step 14
routed to the Internet but is subject to translation to a routable address outside the LAN.
router(config-if)# ip nat inside
Set the BRI interface IP address. In the following example, IP addresses are dynamically assigned:
Step 15
router(config-if)# interface bri0
router(config-if)# ip address negotiated
Enable PPP.
Step 16
router(config-if)# encapsulation ppp
Configure CHAP authentication.
Step 17
router(config-if)# ppp authentication chap
Configure a valid Internet address to which the inside network address will be translated.
Step 18
router(config-if)# ip nat outside
Define the router hostname and password to authenticate. For example:
Step 19
router(config-if)# ppp chap hostname 802
router(config-if)# ppp chap password cisco
Exit to global configuration mode. Add default route and interface. For example:
Step 20
router(config-if)# exit
router(config)# ip route 0.0.0.0 0.0.0.0 bri0
Step 21
End configuration mode.
router(config)# end
router#
In user mode, set global NAT commands. In the following example, all inside network addresses
Step 22
assigned to interface BRI0 are configured for translation, and the access list that contains the inside
network addresses is defined.
router# ip nat inside source list 1 interface bri0 overload
router# access-list 1 permit 192.168.1.0 0.0.0.255
Save your configuration.
Step 23
router# copy running-config startup-config
Installing and Configuring Cisco 802 IDSL and Cisco 804 IDSL Routers
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