---
title: "Bidirectional Transactional Replication | Microsoft Docs"
ms.custom: ""
ms.date: "06/13/2017"
ms.prod: "sql-server-2014"
ms.reviewer: ""
ms.technology: replication
ms.topic: conceptual
helpviewer_keywords: 
  - "bidirectional replication"
  - "transactional replication, bidirectional replication"
  - "bidirectional transactional replication"
ms.assetid: 98772e95-67ed-4010-8108-5113dbe709ff
author: MashaMSFT
ms.author: mathoma
manager: craigg
---
# 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)](/sql/relational-databases/system-stored-procedures/sp-addsubscription-transact-sql) 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](peer-to-peer-transactional-replication.md)