Cisco Cisco 1800 2800 3800 Series 4-Port Async Sync Serial High-Speed WIC
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!
interface GigabitEthernet0/1/1
no ip address
!
interface GigabitEthernet0/1/2
no ip address
!
interface Cellular0/0/0
ip address negotiated
ip nat outside !>> NAT enabled
no ip virtual-reassembly in
encapsulation slip !>>default encap changed from PPP in 3G to slip for 4G
dialer in-band
dialer string lte !>> must match to the chat-script name
dialer-group 1 !>>dialer group number must match the dialer list number
!
interface Vlan18
ip address 192.168.18.1 255.255.255.0
ip nat inside
!Vlan 18 is used as LAN interface and traffic from entering via this interface is
NAT’ed
NAT’ed
!
ip nat inside source list 2 interface Cellular0/0/0 overload
!NAT statement to match the NAT traffic as per access-list 2
ip route 0.0.0.0 0.0.0.0 Cellular0/0/0
!Default route pointing to the cellular interface
!
access-list 1 permit any !>> define what traffic can trigger the dialer
access-list 2 permit 192.168.18.0 0.0.0.255
dialer-list 1 protocol ip list 1 !>>associate acl 1 to dialer-list 1
!
line 0/0/0 !>> line associated with cellular 0/0/0
script dialer lte !>>> “lte” matches to dialer string and the chat-script name
modem InOut
Validating Basic Internet Connectivity
To determine if the basic configuration is working, enter the following show commands:
ROUTER#sh ip route
<snip>
S* 0.0.0.0/0 is directly connected, Cellular0/0/0