Cisco Cisco 3365 Mobility Services Engine Troubleshooting Guide

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Components Used
This document is not restricted to specific software and hardware versions.
Conventions
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Background Information
The MSE is a platform that is capable of running multiple related services. These services provide
high-level service functionality. Therefore, consideration for HA is critical in maintaining the highest
service confidence.
With HA enabled, every active MSE is backed up by another inactive instance. MSE HA
introduces the health monitor in which it configures, manages, and monitors the high availability
setup. A heartbeat is maintained between the primary and secondary MSE. The health monitor is
responsible for setting up database, file replication, and monitoring the application. When the
primary MSE fails and the secondary takes over, the virtual address of the primary MSE is
switched transparently.
This setup (see 
) demonstrates a typical Cisco WLAN deployment that includes Cisco
Mobility Services Engine (MSE) enabled for High Availability. HA support is available on MSE-
3310, MSE-3350/3355, 3365 and Virtual Appliance on ESXi.
Figure 1. Deploying MSE in High Availability