I have 2 internet links from 2 diffrent service providers and terminating on 2 diffrent internet routers.both internet routers are connected to L3 switch on lan side.Both service provider give default route in BGP.presently the setup running with active -standby with default route from 2nd servcie provider redistributed in ospf in lan with higher metric.
now i want to do active-active setup.for inbound i will announce diffrent subnets with diffrent prererence.( e.g. 192.168.0.0/23 to servie provider 1 and 192.168.0.0/24 & 192.168.1.0/24 to service provider 2 so subnet 192.168.0.0/23will be preferred over service provider 2.similary will announce 192.168.2.0/23 to service provider2 and 192.168.2.0/24 and 192.168.3.0/24 to service provider1 so subnet 192.168.2.0/24 preferred on service provider1.
for outbound i will change the metric of default route announed to lan switch with same value so that Lan switch will have 2 diffrent route with equal cost and traffic will be load balanced.can i route specific subnet out on specific default route wih kind of route-map (Say 192.168.2.0/23 will prefer service provider 1 for outbound and 192.168.0.0/23 will prefer service provider2 for outbound traffic.
if any working scenario please share.