Cisco Cisco 1900 2900 3900 Series 8-Port Gigabit Ethernet HS-WIC
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5. Configuring the Router for 4G LTE Connectivity
After you decide which hardware is made available with the associated 4G LTE service from an appropriate service
provider, follow the instructions in the hardware installation guide to install the hardware properly. For installation
instructions, refer to the Cisco 4G LTE hardware installation guide:
In summary, the minimum hardware that is required includes the Cisco EHWIC-4G LTE-x and a Cisco ISR G2
router.
5.1 4G LTE Basic Configuration
The 4G LTE cellular interface is based on asynchronous serial interface and relies on a dial-on-demand
mechanism. This configuration must be similar to any dialer-based interface, such as Serial, ISDN etc.
This configuration involves routing the traffic to the interface and triggering the dialer based on qualified traffic.
The traffic can be routed by static or dynamic IP routes, whereas dialing can be accomplished by triggering the
dialer (dialer-group/dialer-watch/persistent) and a chat script to pass call-setup parameters to the cellular modem.
level overview depicting the layer-3 connectivity between the cellular core network and the Cisco ISR with 4G-LTE
interface. For more information, refer to the Cisco 4G LTE software installation guide:
http://www.cisco.com/en/US/docs/routers/access/interfaces/software/feature/guide/EHWIC-4G LTESW.html
Figure 2. Basic Network Topology for Internet Access Using Cellular Network
5.2 Preparation to Connect
After the hardware installation is complete, make sure that the cellular card can detect the appropriate network and
that the RSSI is within an acceptable range. The show cellular commands can be used to check this information:
ROUTER#sh cell 0/1/0 all