diff --git a/main.go b/main.go
index c8b8a76..c538eaa 100644
--- a/main.go
+++ b/main.go
@@ -12,8 +12,10 @@
 	"github.com/golang/glog"
 	"github.com/golang/protobuf/proto"
 
-	"code.hackerspace.pl/q3k/topo/graph"
 	confpb "code.hackerspace.pl/q3k/topo/proto/config"
+
+	"code.hackerspace.pl/q3k/topo/graph"
+	"code.hackerspace.pl/q3k/topo/state"
 )
 
 var (
@@ -57,9 +59,11 @@
 		glog.Exitf("Initial netbox feed failed: %v", err)
 	}
 
+	stm := state.NewManager()
+
 	sconf := ServiceConfig{
 		DebugListen: flagDebugListen,
 	}
-	srv := NewService(gr, sconf)
+	srv := NewService(gr, stm, sconf)
 	srv.Run()
 }
diff --git a/service.go b/service.go
index ccfd0bc..916299c 100644
--- a/service.go
+++ b/service.go
@@ -7,11 +7,13 @@
 	"sort"
 	"strings"
 
-	"code.hackerspace.pl/q3k/topo/graph"
 	"github.com/gobuffalo/packr"
 	"github.com/golang/glog"
 	"github.com/q3k/statusz"
 	"vbom.ml/util/sortorder"
+
+	"code.hackerspace.pl/q3k/topo/graph"
+	"code.hackerspace.pl/q3k/topo/state"
 )
 
 type ServiceConfig struct {
@@ -20,12 +22,14 @@
 
 type Service struct {
 	gr     *graph.Graph
+	stm    *state.StateManager
 	config ServiceConfig
 }
 
-func NewService(gr *graph.Graph, c ServiceConfig) *Service {
+func NewService(gr *graph.Graph, stm *state.StateManager, c ServiceConfig) *Service {
 	return &Service{
 		gr:     gr,
+		stm:    stm,
 		config: c,
 	}
 }
diff --git a/state/state.go b/state/state.go
new file mode 100644
index 0000000..5f7cc56
--- /dev/null
+++ b/state/state.go
@@ -0,0 +1,24 @@
+package state
+
+import (
+	pb "code.hackerspace.pl/q3k/topo/proto/control"
+)
+
+type SwitchportState struct {
+	Proto *pb.SwitchPort
+}
+
+type SwitchState struct {
+	Name  string
+	Ports []*SwitchportState
+}
+
+type StateManager struct {
+	Switches map[string]*SwitchState
+}
+
+func NewManager() *StateManager {
+	return &StateManager{
+		Switches: make(map[string]*SwitchState),
+	}
+}