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Configuring High Availability (HA)
This chapter covers the following topics:
•
Adding High Availability Cisco NAC Appliance To Your Network, page 4-1
•
Installing a Clean Access Manager High Availability Pair, page 4-3
•
Installing a Clean Access Server High Availability Pair, page 4-17
•
Configuring High Availability for Virtual Gateway Mode, page 4-42
•
Useful CLI Commands for HA, page 4-43
Adding High Availability Cisco NAC Appliance To Your Network
The following diagrams illustrate how HA-CAMs and HA-CASs can be added to an example
core-distribution-access network (with Catalyst 6500s in the distribution and access layers).
Figure 4-1
shows a network topology without Cisco NAC Appliance, where the core and distribution
layers are running HSRP (Hot Standby Router Protocol), and the access switches are dual-homed to the
distribution switches.
Figure 4-1
Example Core-Distribution-Access Network Before Cisco NAC Appliance
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