IronPort - advanced configuration guide

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7-20 Figure 7-5 Creating a Listener on the New Loopback IP Interface Cisco IronPort AsyncOS 7.6 for Email Advanced Configuration Guide Chapter 7 Advanced Network Configuration OL-25137-01
OL-25137-01 Centralized Management CHAPTER 8 The Cisco IronPort centralized management feature (available via feature key) allows you to manage and configure multiple appliances at the same time, reducing administration time and ensuring a consistent configuration across your network. You do not need to purchase additional hardware for managing multiple appliances. The centralized management feature provides increased reliability, flexibility, and scalability within your network, allowing you to manage globally while complying with local policies. A cluster is defined as a set of machines that share configuration information. Within the cluster, machines (Cisco IronPort appliances) are divided into groups; every cluster will contain at least one group. A given machine is a member of one and only one group. An administrator user can configure different elements of the system on a cluster-wide, group-wide, or per-machine basis, enabling the segmentation of Cisco IronPort appliances based on network, geography, business unit, or other logical relationships. Clusters are implemented as a peer-to-peer architecture; there is no master/slave relationship within a cluster. You may log into any machine to control and administer the cluster. (Some configuration commands, however, are limited. See Restricted Commands, page 8-15.) The user database is shared across all machines in the cluster. That is, there will be only one set of users and one administrator user (with the associated passwords) for an entire cluster. All machines that join a cluster will share a single administrator password which is referred to as the admin password of the cluster. Topics discussed in this chapter include: Cluster Requirements, page 8-1 Cluster Organization, page 8-2 Creating and Joining a Cluster, page 8-4 Managing Clusters, page 8-11 Cluster Requirements Administering a Cluster from the GUI, page 8-16 Cluster Communication, page 8-19 Best Practices and Frequently Asked Questions, page 8-23 Machines in a cluster must have resolvable hostnames in DNS. Alternatively, you can use IP addresses instead, but you may not mix the two. See DNS and Hostname Resolution, page 8-19. Cluster communication is normally initiated using the DNS hostnames of the machines. Cisco IronPort AsyncOS 7.6 for Email Advanced Configuration Guide 8-1
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