BGP Multipath load balancing needs to be configured manually where other protocols works that automatically.
Also routes should be some matching criteria include weight, local preference, AS path, origin code, MED, and IGP metric .
Here is the command
Router(config)#router bgp <As no>
Router(config-router)#maximum-paths <no>
verify new routing table by sh ip route command
If there is difference in AS-numbers, apply below command as well.
Router(config)#bgp bestpath as-path multipath-relax
If there is difference in AS-numbers, apply below command as well.
Router(config)#bgp bestpath as-path multipath-relax
