---
title: "Bidirectional Transactional Replication | Microsoft Docs"
ms.custom: ""
ms.date: "03/04/2017"
ms.prod: "sql-server-2016"
ms.reviewer: ""
ms.suite: ""
ms.technology: 
  - "replication"
ms.tgt_pltfrm: ""
ms.topic: "article"
helpviewer_keywords: 
  - "bidirectional replication"
  - "transactional replication, bidirectional replication"
  - "bidirectional transactional replication"
ms.assetid: 98772e95-67ed-4010-8108-5113dbe709ff
caps.latest.revision: 27
author: "BYHAM"
ms.author: "rickbyh"
manager: "jhubbard"
---
# Bidirectional Transactional Replication
  Bidirectional transactional replication is a specific transactional replication topology that allows two servers to exchange changes with each other: each server publishes data and then subscribes to a publication with the same data from the other server. The **@loopback_detection** parameter of [sp_addsubscription (Transact-SQL)](../../../relational-databases/system-stored-procedures/sp-addsubscription-transact-sql.md) is set to TRUE to ensure that changes are only sent to the Subscriber and do not result in the change being sent back to the Publisher.  
  
 In [!INCLUDE[ssVersion2005](../../../includes/ssversion2005-md.md)] and later versions, this topology is also supported by peer-to-peer transactional replication, but bidirectional replication can provide improved performance.  
  
## See Also  
 [Peer-to-Peer Transactional Replication](../../../relational-databases/replication/transactional/peer-to-peer-transactional-replication.md)