diff --git a/node/network/src/lib.rs b/node/network/src/lib.rs
index c6a21d8..09a0dfb 100644
--- a/node/network/src/lib.rs
+++ b/node/network/src/lib.rs
@@ -93,7 +93,10 @@ pub use peer_manager::{
 };
 pub use service::{load_private_key, Context, Libp2pEvent, Service, NETWORK_KEY_FILENAME};
 
-pub const PROTOCOL_VERSION: [u8; 3] = [0, 1, 0];
+/// Defines the current P2P protocol version.
+/// - v1: Broadcast FindFile & AnnounceFile messages in the whole network, which caused network too heavey.
+/// - v2: Publish NewFile to neighbors only and announce file via RPC message.
+pub const PROTOCOL_VERSION: [u8; 3] = [0, 2, 0];
 
 /// Application level requests sent to the network.
 #[derive(Debug, Clone, Copy)]
diff --git a/node/router/src/libp2p_event_handler.rs b/node/router/src/libp2p_event_handler.rs
index 57fa79d..fa62a5f 100644
--- a/node/router/src/libp2p_event_handler.rs
+++ b/node/router/src/libp2p_event_handler.rs
@@ -397,6 +397,9 @@ impl Libp2pEventHandler {
             Err(_) => return MessageAcceptance::Reject,
         };
 
+        // update shard config cache
+        self.file_location_cache.insert_peer_config(from, announced_shard_config);
+
         // ignore if already exists
         match self.store.check_tx_completed(msg.tx_id.seq).await {
             Ok(true) => return MessageAcceptance::Ignore,
@@ -423,9 +426,6 @@ impl Libp2pEventHandler {
             self.send_to_sync(SyncMessage::NewFile { from, msg });
         }
 
-        self.file_location_cache
-            .insert_peer_config(from, announced_shard_config);
-
         MessageAcceptance::Ignore
     }