headless1, naked1,
			},
		},
		"ReachableDestinations from naked": {
			filter: func(instances echo.Instances) echo.Instances {
				return echotest.ReachableDestinations(naked1, instances)
			},
			expect: echo.Instances{
				// only same network/cluster, no VMs
				a1, a1Ns2, b1, c1, headless1, naked1, external1,
			},
		},
		"ReachableDestinations from vm": {