PassthroughFilterChain = "PassthroughFilterChain"

	// Inbound pass through cluster need to the bind the loopback ip address for the security and loop avoidance.
	InboundPassthroughCluster = "InboundPassthroughCluster"

	// IstioMetadataKey is the key under which metadata is added to a route or cluster
	// regarding the virtual service or destination rule used for each