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13-5
Cisco 1800 Series Integrated Services Routers (Fixed) Software Configuration Guide
OL-6426-02
Chapter 13 Configuring Dial Backup and Remote Management
Dial Backup Feature Limitations
Dial Backup Feature Limitations
The following limitation exists for the dial backup feature: bridging is not supported over console or
auxiliary port backup interfaces.
Table 13-1 summarizes dial backup support and limitations for the Cisco 1800 series integrated services
fixed-configuration routers.
Step 5
ip route prefix mask {ip-address | interface-type
interface-number [ip-address]} [distance]
Example:
Router(config)# ip route 0.0.0.0 0.0.0.0
192.168.2.2 150
Router(config)#
Assigns the lower routing administrative distance
value for the backup interface route. 192.168.2.2
is the peer IP address of the backup interface.
Step 6
dialerwatch-list group-number {ip ip-address
address-mask | delay route-check initial
seconds}
Example:
Router(config)# dialer watch-list 2 ip
22.0.0.2 255.255.255.255
Router(config)#
Assigns an IP address to the watch list.
If the connection on the primary interface is lost
and the IP address is unavailable on the router, the
dial-out feature on the backup interface is
triggered. 22.0.0.2 is the peer IP address of the
primary interface.
Command Purpose
Table 13-1 Dial Backup Feature Support and Limitations Summary
WAN Encapsulation
Type
Dial Backup
Possible? Dial Backup Method Limitations
Cisco 1811 or Cisco 1812
PPPoE Yes Dialer watch Bridging is not supported across a slow interface, for
example, an auxiliary port. The peer IP address of the ISP is
needed to configure the dialerwatch command and the IP
static route.
Normal IP in cable
modem scenario
No Dialer watch The IP addresses of the peers are needed for dialer watch to
work properly. If a lease time obtained by DHCP is not set
short enough (1 or 2 minutes), dial backup is not supported.