Cisco WIC-1AM-V2 and WIC-2AM-V2 Analog Modem WAN Interface Card
Configuration Examples for Cisco WIC-1AM-V2 and WIC-2AM-V2 Analog Modem WIC
18
Cisco IOS Release 12.3(14)T
Configuration Examples for Cisco WIC-1AM-V2 and WIC-2AM-V2 Analog Modem WIC
This section contains the following examples:
Configuring for Asynchronous Dial Backup: Example

Configuring for Asynchronous Dial Backup: Example

In this example, the interface S2/0 is configured as a primary link. Configuring the route through the
backup interface (the V.90 modem WIC in this case) is very important. 10.0.0.0 in the IP route indicates
the network number of the remote end. Thus, all packets for the destination IP are routed through the
backup link if the primary link goes down. The 180 in the route command indicates the cost of the route
taken (It should be more than the cost of the primary route). This avoids the packets taking the backup
link when the primary link is up.
The following example shows an asynchronous dial backup configuration:
interface Serial2/0
ip address 70.1.1.2 255.255.255.0
backup delay 15 15
backup interface as33
interface Async33
ip address 51.1.1.2 255.255.255.0
encapsulation ppp
dialer in-band
dialer map ip 51.1.1.1 name m1_2621_33 modem-script cisco-default 101
dialer-group 1
ppp authentication chap
async mode interactive
!
router eigrp 100
redistribute static
network 10.0.0.0
network 70.0.0.0
!
ip route 10.0.0.0 255.0.0.0 51.1.1.2 180
!/very important/
line 33
autoselect ppp
modem InOut
flowcontrol hardware
transport input all
For more information on configuring dial backup, see the section Configuring Dial Backup for Serial
Lines in theCis co IOS Dial Technologies Configuration Guide.