Chapter 6. Implementing and Managing High Availability

In this chapter, you will learn how to create an Exchange environment that is more resilient to failure by making different aspects of your deployment highly available. We will cover the following recipes:

• Designing for high availability

• Creating a highly available Client Access Server infrastructure

• Load balancing at layer 4 using DNS round robin

• Load balancing at layer 4 using a single IP address and a load balancer

• Load balancing at layer 4 using multiple IP addresses and a load balancer

• Load balancing at layer 7 using a load balancer

• Creating a highly available mailbox server infrastructure

• Configuring a DAG

• Managing a DAG

• Configuring transport high availability

• Configuring redundant inbound mail delivery

• Performing maintenance in a highly available environment