Thanks for the reply. Please tell me what can be the impact of Track 2 ?
I faced one problem in which both the WAN 1 was down which made Track 1 down but when WAN 1 came up, the Track 1 in the router was not up. So, I had to add the another default route entry manually as ip route 0.0.0.0 0.0.0.0 18.104.22.168. After that the Track 1 came up. Why this was happened? Please suggest. After adding this route, the entries in the router were :