Troubleshooting Network-Bound Problems
Microsoft Exchange Server 2007 will reach end of support on April 11, 2017. To stay supported, you will need to upgrade. For more information, see Resources to help you upgrade your Office 2007 servers and clients.
Applies to: Exchange Server 2007, Exchange Server 2007 SP1
Topic Last Modified: 2015-03-08
This topic provides information about performance counters and suggestions about how to improve network performance. The network and how it is deployed is essential to the proper performance of an Exchange server. It is uncommon for networks to be network-bound because 100 megabits per second (Mbps) networks generally offer enough bandwidth for most organizations. However, with increasing message sizes and users per server, it is important to make sure that the network does not become a bottleneck.
Use the performance monitor counters listed in the following table to determine whether there is any network performance degradation.
Performance counters for networks
Network Interface\Bytes Total/sec
Indicates the rate at which the network adapter is processing data bytes.
This counter includes all application and file data, in addition to protocol information such as packet headers.
Network Interface\Packets Outbound Errors
Indicates the number of outbound packets that could not be transmitted because of errors.
When there is significant traffic, and therefore overhead due to packet collision, you can improve network performance by separating inter-server and global catalog traffic from client traffic. You can do this by having servers and global catalogs with dual network adapters, and by building a separate network for the communication required by servers and global catalogs.