The idea is to have a backup for eureka instance.If one instance in 'x' cluster goes down. Zuul should be able to pick the another eureka instance 'y' To run Eurek Peer awareness in windows machine locally, please append the below code at the end of hosts file under C:\Windows\System32\drivers\etc: below:
127.0.0.1 eureka-peer1 localhost eureka-peer1 ::1 eureka-peer1 127.0.0.1 eureka-peer2 localhost eureka-peer2 ::1 eureka-peer2