fea: switch: support router network

pkg/config/router.go

@@ -0,0 +1,11 @@
+package config
+
+type RouterSpecifies struct {
+	Mss     int      `json:"tcpMss,omitempty"`
+	Name    string   `json:"name,omitempty"`
+	Link    string   `json:"link,omitempty"`
+	Subnets []Subnet `json:"subnets"`
+}
+
+func (n *RouterSpecifies) Correct() {
+}