e>cluster2</code> observe the API Servers
in each cluster for endpoints.</p><p>Service workloads across cluster boundaries communicate indirectly, via
dedicated gateways for <a href=https://en.wikipedia.org/wiki/East-west_traffic>east-west</a>
traffic. The gateway in each cluster must be reachable from the other cluster.</p><figure style=width:75%><div class=wrapper-with-intrinsic-ratio style=padding-bottom:75%><a data-skipendnotes=true href=/v1.18/docs/setup/install/multicluster/multi-primary_multi-network