i have 2 different ISP viz airtel and bsnl and 4 different vlan 1)vlan1:10.0.0.1 -255.255.255.0 2)vlan2:10.0.2.1 -255.255.255.0 3) and vlan4 10.0.4.1-255.255.0.0 i want to have intranet within this network
You need a commercial router or maybe a consumer on with third party firmware like dd-wrt. You could also use a layer 3 switch if you really have vlans. The larger issue is going to be connecting to 2 ISP and how you plan to share them. That is more of a load balancer function.