We have 3 ISPs providing us MPLS links to our Datacenter Routers as a primary and Secondary ( Kindly refer to the attached diagram ppt).These will be connected on our Primary and Secondary MPLS Routers in Auto-failover mode. We have n numbers of remote sites connected via these ISPs ( only 2 links at a single site in primary and secondary mode).
Our requirement is to configure the BGP at DC end routers in auto-failover mode and same is at remote site end.At a time only primary links must be in use and secondary would be functional when primary goes down.
WAN IPs are differ but LAN IPs are common for all the providers ( means DC and Remote side LAN) and we have /27 WAN pool at DC end to connect ISPs in a mannar as follows:
DC : primary : 10.x.1.2 ISP-1 Primary : 10.x.1.3
DC : primary : 10.x.1.2 ISP-2 Primary : 10.x.1.4
DC : primary : 10.x.1.2 ISP-3 Primary : 10.x.1.5
DC : Secondary : 10.x.2.2 ISP-1 Primary : 10.x.2.3
DC : Secondary: 10.x.2.2 ISP-1 Primary : 10.x.2.4
DC : Secondary : 10.x.2.2 ISP-1 Primary : 10.x.2.5
and at Remote end :
Only 2 ISPs can be connected as a primary and secondary using BGP and auto failover form
ISP-1 primary - 10.x.x.32/30
IPS-2 Secondary - 10.y.y.160/30
LAN pool- /27
Request you all to suggest\ provide a sample configuration on BGP.
Thanks a lot !