Cisco 3945 User Manual

104
Cisco 3900 Series, Cisco 2900 Series, and Cisco 1900 Series Integrated Services Routers Generation 2 Software Configuration Guide
OL-20696-04
Chapter Configuring Backup Data Lines and Remote Management
Configuring Backup Interfaces
DETAILED STEPS
Cellular Wireless Modem as Backup with NAT and IPSec Configuration
The following example shows how to configure the 3G wireless modem as backup with NAT and IPsec
on either GSM or CDMA networks.
Note The receive and transmit speeds cannot be configured. The actual throughput depends on the cellular
network service.
Router# sh run
Building configuration...
Current configuration : 5833 bytes
!
! Last configuration change at 18:26:15 UTC Wed Sep 30 2009
!
version 12.4
service timestamps debug datetime msec
service timestamps log datetime msec
no service password-encryption
service internal
!
hostname Router
!
boot-start-marker
boot-end-marker
!
!
no aaa new-model
!
!
!
service-module wlan-ap 0 bootimage autonomous
!
no ipv6 cef
ip source-route
ip cef
!
!
ip multicast-routing
Command or Action Purpose
Step 1
configure terminal
Example:
Router# configure terminal
Enters global configuration mode from the terminal.
Step 2
ip route network-number network-mask {ip-address |
interface} [administrative-distance] [name name]
Example:
Router (config)# ip route 0.0.0.0 Dialer 2 track 234
Establishes a floating static route with the
configured administrative distance through the
specified interface.
A higher administrative distance should be
configured for the route through the backup
interface, so that the backup interface is used only
when the primary interface is down.

Cisco 3945 Specifications

General

Form Factor	Rack-mountable
Maximum Throughput	75 Mbps
Product Type	Router
Connectivity Technology	Wired
Data Link Protocol	Ethernet, Fast Ethernet, Gigabit Ethernet
Operating System	Cisco IOS
Flash Memory	256 MB
Network/Transport Protocol	IPSec
Remote Management Protocol	SNMP
Encryption Algorithm	DES, AES
Features	Firewall, VPN, Quality of Service (QoS), VLAN support
Interfaces	2 x USB
Security Features	Intrusion Prevention System (IPS)
Operating Temperature	32 °F to 104 °F (0 °C to 40 °C)
Storage Temperature	-4 °F to 149 °F (-20 °C to 65 °C)
Humidity	10 - 85% (non-condensing)
Memory	2 GB
Expansion Slots	4 (free) x EHWIC ¦ 2 x service module ¦ 1 x ISM ¦ 1 x CompactFlash Card