MAIPU - – Backup Configuration Example for Static routing.

 MP 1800 Router – Backup configuration for Ethernet interfaces using static Routing.

MP1800 Router is connected via redundant links for High Internet Availability.  As primary link fail, Backup should work. But due to Ethernet last mile, we require to configure keepalive gateway to detect the peer availability (same subnet IP).  

MP1800-3 Router Configuration:

vlan 1

 description default

 port 0-7 untagged

 exit

port 0

 pvid 1

 exit

interface fastethernet0

 description *** CONNECTED TO WAN***

 ip address 100.1.1.1 255.255.255.252

 keepalive gateway 100.1.1.2 10

backup interface f1

 exit

interface fastethernet1

 description ## BACKUP LINK##

 ip address 101.1.1.1 255.255.255.252

 exit

interface switchethernet0

 description ***LOCAL LAN ***

 ip address 192.168.1.1 255.255.255.0

 vlan 1

 exit

ip route 0.0.0.0 0.0.0.0 100.1.1.2

ip route 0.0.0.0 0.0.0.0 101.1.1.2 100

As the primary link goes down, The backup link will start working and second static route will be active.