Inter-Site Replication Test

Inter-site replication is based on the assumption that the WAN is connected by slower links or site links. It is designed to minimize traffic rather than CPU cycles. In inter-site replication, data is compressed and then sent out.

Bridgehead servers perform directory replication between sites. Only two designated domain controllers talk to each other. These domain controllers are called “Bridgehead servers”.

After updates are replicated from one site to the bridgehead server in the other site, the updates are then replicated to other domain controllers within the site through intra-site replication process.


This test applies only to Active Directory Servers installed on Windows 2003.

Target of the test : An Active Directory or Domain Controller on Windows 2003

Agent deploying the test : An internal agent

Outputs of the test : One set of results for every Active Directory server being monitored

Configurable parameters for the test
Parameters Description

Test period

This indicates how often should the test be executed.


The IP address of the machine where the Active Directory is installed.


The port number through which the Active Directory communicates. The default port number is 389.

Measurements made by the test
Measurement Description Measurement Unit Interpretation

In rate

This measure indicates the number of inbound kilobytes replicated between sites per second.


A high value for this measure indicates that the bridgehead server is receiving high inter-site inbound replication traffic.

Out rate

This measure indicates the number of outbound kilobytes replicated between sites per second.


A high value indicates that bridgehead server is sending high inter-site outbound replication traffic.