To replicate data to an established destination cluster from a source cluster, you can use the REST API or Couchbase Web Console. Once you create a replication it will automatically begin between the clusters. As a REST call:

shell> curl -v -X POST -u Administrator:password1 http://10.4.2.4:8091/controller/createReplication 
-d uuid=9eee38236f3bf28406920213d93981a3 
-d fromBucket=beer-sample 
-d toCluster=remote1 
-d toBucket=remote_beer 
-d replicationType=continuous

This will send a request similar to the following example:

POST / HTTP/1.1
Authorization: Basic QWRtaW5pc3RyYXRvcjpwYXNzd29yZDE=
User-Agent: curl/7.21.4 (universal-apple-darwin11.0) libcurl/7.21.4 OpenSSL/0.9.8r zlib/1.2.5
Host: 10.4.2.4:8091
Accept: */*
Content-Length: 126
Content-Type: application/x-www-form-urlencoded

If Couchbase Server successfully create the replication, it will immediately begin replicating data from the source to destination cluster. You will get a response similar to the following JSON:

{
  "id": "9eee38236f3bf28406920213d93981a3/beer-sample/remote_beer",
  "database": "http://10.4.2.4:8092/_replicator"
}

The unique document ID returned in the JSON is a reference you can use if you want to delete the replication.

For more information about XDCR and creating a new replication see Section 5.8.5, “Configuring Replication”.