diff --git a/dc/proto/BUILD.bazel b/dc/proto/BUILD.bazel
new file mode 100644
index 0000000..cfee72e
--- /dev/null
+++ b/dc/proto/BUILD.bazel
@@ -0,0 +1,23 @@
+load("@io_bazel_rules_go//go:def.bzl", "go_library")
+load("@io_bazel_rules_go//proto:def.bzl", "go_proto_library")
+
+proto_library(
+    name = "proto_proto",
+    srcs = ["dc.proto"],
+    visibility = ["//visibility:public"],
+)
+
+go_proto_library(
+    name = "proto_go_proto",
+    compilers = ["@io_bazel_rules_go//proto:go_grpc"],
+    importpath = "code.hackerspace.pl/hscloud/dc/proto",
+    proto = ":proto_proto",
+    visibility = ["//visibility:public"],
+)
+
+go_library(
+    name = "go_default_library",
+    embed = [":proto_go_proto"],
+    importpath = "code.hackerspace.pl/hscloud/dc/proto",
+    visibility = ["//visibility:public"],
+)
diff --git a/dc/proto/dc.proto b/dc/proto/dc.proto
new file mode 100644
index 0000000..2b242ec
--- /dev/null
+++ b/dc/proto/dc.proto
@@ -0,0 +1,65 @@
+syntax = "proto3";
+package dc;
+option go_package = "code.hackerspace.pl/hscloud/dc/proto";
+
+message GetPortsRequest {
+};
+
+message SwitchPort {
+    enum Speed {
+        SPEED_INVALID = 0;
+        SPEED_100M = 1;
+        SPEED_1G = 2;
+        SPEED_10G = 3;
+    };
+    string name = 1;
+    Speed speed = 2;
+    enum LinkState {
+        LINKSTATE_INVALID = 0;
+        LINKSTATE_DOWN = 1;
+        LINKSTATE_UP = 2;
+    };
+    LinkState link_state = 3;
+    enum PortMode {
+        PORTMODE_INVALID = 0;
+        // Interface is bridged to a VLAN, untagged.
+        PORTMODE_SWITCHPORT_UNTAGGED = 1;
+        // Interfaces is bridged to several tagged 802.1q VLANs.
+        PORTMODE_SWITCHPORT_TAGGED = 2;
+        // Interface is in 'generic', both tagged 802.1q and untagged mode.
+        PORTMODE_SWITCHPORT_GENERIC = 3;
+        // Interface is routed, ie routes packets from a separate L3 network
+        // and the Switch is the default gateway for machines in this network.
+        PORTMODE_ROUTED = 4;
+        // Interface is in a configuration state that cannot be clearly stated
+        // in terms of this enum, and should be reconfigured.
+        PORTMODE_MANGLED = 5;
+    };
+    PortMode port_mode = 4;
+    // For PORTMODE_SWITCHPORT_UNTAGGED and PORTMODE_SWITCHPORT_GENERIC, the
+    // VLAN ID that this interface is natively bridged to.
+    int32 vlan_native = 5;
+    // For PORTMODE_SWITCHPORT_TAGGED and PORTMODE_SWITCHPORT_GENERIC, the VLAN
+    // IDs that the interface is bridged to using 802.1q tags.
+    repeated int32 vlan_tagged = 6;
+    // For PORTMODE_ROUTED
+    repeated string prefixes = 7;
+    // Interface MTU
+    int32 mtu = 8;
+    enum SpanningTreeMode {
+        SPANNING_TREE_MODE_INVALID = 0;
+        // Send STP BPDU, on timeout switch to Forwarding.
+        SPANNING_TREE_MODE_AUTO_PORTFAST = 1;
+        // Switch to Forwarding immediately on link up.
+        SPANNING_TREE_MODE_PORTFAST = 2;
+    };
+    SpanningTreeMode spanning_tree_mode = 9;
+};
+
+message GetPortsResponse {
+    repeated SwitchPort ports = 1;
+};
+
+service SwitchControl {
+    rpc GetPorts(GetPortsRequest) returns (GetPortsResponse);
+};