VSNL Sify 10.10.10.1/24 192.168.1.1 / 24 192.168.2.1 / 24 192.168.2.3/24 Internal Network 172.16.32.0 / 255.255.255.0 Default gateway is 172.16.32.1 192.168.1.1/24 is the serial interface on my 1721 router 192.168.2.2/24 are the IP’s provided by my ISP. Ethernet IP of my firewall (ouside Interface) is 192.168.2.2/24 Other Service Provided’s IP are 10.10.10.1/24 In my firewall I have nated my private IP to public interface of firewall. This configuration works well with out redundancy. All Traffic from my private network is routed to VSNL.. I have to now build redundancy such that if VSNL Link fails all traffic is Diverted to SIFY. I have configured cisco 2801 ethernet interface to have valid ip provided By VSNL so that I can build HSRP. Cisco 2801 is coming active if VSNL circuit fails but my internet traffic is No reaching Internet. 192.168.2.4/24 Standby IP. 192.168.2.2 / 24