Frame Relay WAN Link with PPP Backup Sample Configuration
XSR(config)#interface fastethernet 1
Configure DHCP/BOOTP Relay
XSR(config)#interface gigabitethernet 1
+Adds GigabitEthernet port 1 and acquires Interface mode
+Marks destination IP address for UDP broadcasts
Configure the Dial Backup Connection
XSR(config)#interface serial 1/0
+Adds serial port 1 and acquires Interface mode
+Enables PPP encapsulation
+Sets the IP address on the interface
+Adds a backup dialer interface
+Sets the interval that elapses after the primary interfaces fails and comes up
+Enables the interface
XSR(config)#interface serial 2/0
+Adds serial port 2 and acquires Interface mode
+Adds a dial pool member
+Sets synchronous mode
+Enables the interface
XSR(config)#int dialer 1
+Adds dialer interface and acquires Dialer Interface mode
+Enables PPP encapsulation
+Sets the IP address on the interface
+Sets dialer phone #
+Specifies the period the XSR will wait for a connection from the service provider
+Specifies the dial pool from which calls originate
+Enables the dial interface
XSR Getting Started Guide