Cisco Cisco ASA 5545-X Adaptive Security Appliance 문제 해결 가이드

Contributed by Gustavo Medina, Cisco TAC Engineer.
Aug 01, 2014

Introduction
Prerequisites
     Requirements
     Components Used
Background Information 
     Load−Balancing Algorithm
Master Election Process
     Caveat for Reboot Scenarios
Master Reelection Process
     Master Device Removed from the Cluster
     Master Device does Not Respond to Cluster Member Hello Messages
Troubleshoot
Related Information

This document describes the Master Election process in a VPN load−balancing scenario with the Cisco
5500−X Series Adaptive Security Appliance (ASA).

There are no specific requirements for this document.

The information in this document is based on the Cisco ASA 5500−X that runs software Version 9.2.

Note: This document also applies to all software versions, since the feature was first introduced in Version
7.0(1).

The information in this document was created from the devices in a specific lab environment. All of the
devices used in this document started with a cleared (default) configuration. If your network is live, make sure
that you understand the potential impact of any command.

VPN load balancing is a mechanism that is used in order to equitably distribute network traffic among the
devices in a virtual cluster. Load balancing is based on simple distribution; it does not take in to account
throughput utilization or other factors. A load−balancing cluster consists of two or more devices, a master and
one or more secondary devices, and these devices do not have to be configured identically.