diff --git a/build/params_shared.go b/build/params_shared.go
index b202c5925..a4c986e1b 100644
--- a/build/params_shared.go
+++ b/build/params_shared.go
@@ -8,6 +8,11 @@ import (
 
 // Core network constants
 
+const NetworkName = "interop"
+const BlocksTopic = "/fil/blocks/" + NetworkName
+const MessagesTopic = "/fil/msgs/" + NetworkName
+const DhtProtocolName = "/fil/kad/" + NetworkName
+
 // /////
 // Storage
 
diff --git a/chain/messagepool/messagepool.go b/chain/messagepool/messagepool.go
index 7cd1aaa26..f63dfa2cb 100644
--- a/chain/messagepool/messagepool.go
+++ b/chain/messagepool/messagepool.go
@@ -45,8 +45,6 @@ var (
 )
 
 const (
-	msgTopic = "/fil/messages"
-
 	localMsgsDs = "/mpool/local"
 
 	localUpdates = "update"
@@ -237,7 +235,7 @@ func (mp *MessagePool) repubLocal() {
 					continue
 				}
 
-				err = mp.api.PubSubPublish(msgTopic, msgb)
+				err = mp.api.PubSubPublish(build.MessagesTopic, msgb)
 				if err != nil {
 					errout = multierr.Append(errout, xerrors.Errorf("could not publish: %w", err))
 					continue
@@ -282,7 +280,7 @@ func (mp *MessagePool) Push(m *types.SignedMessage) (cid.Cid, error) {
 	}
 	mp.lk.Unlock()
 
-	return m.Cid(), mp.api.PubSubPublish(msgTopic, msgb)
+	return m.Cid(), mp.api.PubSubPublish(build.MessagesTopic, msgb)
 }
 
 func (mp *MessagePool) Add(m *types.SignedMessage) error {
@@ -480,7 +478,7 @@ func (mp *MessagePool) PushWithNonce(addr address.Address, cb func(uint64) (*typ
 		log.Errorf("addLocal failed: %+v", err)
 	}
 
-	return msg, mp.api.PubSubPublish(msgTopic, msgb)
+	return msg, mp.api.PubSubPublish(build.MessagesTopic, msgb)
 }
 
 func (mp *MessagePool) Remove(from address.Address, nonce uint64) {
diff --git a/node/impl/full/sync.go b/node/impl/full/sync.go
index 4a769502b..48ae34d84 100644
--- a/node/impl/full/sync.go
+++ b/node/impl/full/sync.go
@@ -4,6 +4,7 @@ import (
 	"context"
 
 	"github.com/filecoin-project/lotus/api"
+	"github.com/filecoin-project/lotus/build"
 	"github.com/filecoin-project/lotus/chain"
 	"github.com/filecoin-project/lotus/chain/types"
 	cid "github.com/ipfs/go-cid"
@@ -76,7 +77,7 @@ func (a *SyncAPI) SyncSubmitBlock(ctx context.Context, blk *types.BlockMsg) erro
 	}
 
 	// TODO: anything else to do here?
-	return a.PubSub.Publish("/fil/blocks", b)
+	return a.PubSub.Publish(build.MessagesTopic, b)
 }
 
 func (a *SyncAPI) SyncIncomingBlocks(ctx context.Context) (<-chan *types.BlockHeader, error) {
diff --git a/node/modules/lp2p/host.go b/node/modules/lp2p/host.go
index af02fdba1..be2379bb9 100644
--- a/node/modules/lp2p/host.go
+++ b/node/modules/lp2p/host.go
@@ -80,7 +80,7 @@ func DHTRouting(client bool) interface{} {
 			dhtopts.Client(client),
 			dhtopts.Datastore(dstore),
 			dhtopts.Validator(validator),
-			dhtopts.Protocols("/lotus/kad/1.0.0"),
+			dhtopts.Protocols(build.DhtProtocolName),
 		)
 
 		if err != nil {
diff --git a/node/modules/services.go b/node/modules/services.go
index d87058b5d..cac24391b 100644
--- a/node/modules/services.go
+++ b/node/modules/services.go
@@ -12,6 +12,7 @@ import (
 	"github.com/filecoin-project/go-fil-markets/retrievalmarket"
 	"github.com/filecoin-project/go-fil-markets/retrievalmarket/discovery"
 	"github.com/filecoin-project/go-fil-markets/storagemarket"
+	"github.com/filecoin-project/lotus/build"
 	"github.com/filecoin-project/lotus/chain"
 	"github.com/filecoin-project/lotus/chain/blocksync"
 	"github.com/filecoin-project/lotus/chain/messagepool"
@@ -23,9 +24,6 @@ import (
 	"github.com/filecoin-project/lotus/node/modules/helpers"
 )
 
-const BlocksTopic = "/fil/blocks"
-const MessagesTopic = "/fil/messages"
-
 func RunHello(mctx helpers.MetricsCtx, lc fx.Lifecycle, h host.Host, svc *hello.Service) {
 	h.SetStreamHandler(hello.ProtocolID, svc.HandleStream)
 
@@ -53,7 +51,7 @@ func RunBlockSync(h host.Host, svc *blocksync.BlockSyncService) {
 func HandleIncomingBlocks(mctx helpers.MetricsCtx, lc fx.Lifecycle, ps *pubsub.PubSub, s *chain.Syncer, h host.Host) {
 	ctx := helpers.LifecycleCtx(mctx, lc)
 
-	blocksub, err := ps.Subscribe(BlocksTopic)
+	blocksub, err := ps.Subscribe(build.BlocksTopic)
 	if err != nil {
 		panic(err)
 	}
@@ -63,7 +61,7 @@ func HandleIncomingBlocks(mctx helpers.MetricsCtx, lc fx.Lifecycle, ps *pubsub.P
 		h.ConnManager().TagPeer(p, "badblock", -1000)
 	})
 
-	if err := ps.RegisterTopicValidator(BlocksTopic, v.Validate); err != nil {
+	if err := ps.RegisterTopicValidator(build.BlocksTopic, v.Validate); err != nil {
 		panic(err)
 	}
 
@@ -73,7 +71,7 @@ func HandleIncomingBlocks(mctx helpers.MetricsCtx, lc fx.Lifecycle, ps *pubsub.P
 func HandleIncomingMessages(mctx helpers.MetricsCtx, lc fx.Lifecycle, ps *pubsub.PubSub, mpool *messagepool.MessagePool) {
 	ctx := helpers.LifecycleCtx(mctx, lc)
 
-	msgsub, err := ps.Subscribe(MessagesTopic)
+	msgsub, err := ps.Subscribe(build.MessagesTopic)
 	if err != nil {
 		panic(err)
 	}
@@ -89,7 +87,7 @@ func HandleIncomingMessages(mctx helpers.MetricsCtx, lc fx.Lifecycle, ps *pubsub
 		return true
 	}
 
-	if err := ps.RegisterTopicValidator(MessagesTopic, v); err != nil {
+	if err := ps.RegisterTopicValidator(build.MessagesTopic, v); err != nil {
 		panic(err)
 	}