Cisco NAC-3310, Руководство по установке

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4-25
Cisco NAC Appliance Hardware Installation Guide
OL-20326-01
Chapter 4 Configuring High Availability (HA)
Installing a Clean Access Server High Availability Pair
Figure 4-11 List of Servers
Note
Cisco NAC Appliance web consoles support Internet Explorer 6.0 and 7.0 browsers.
Selecting and Configuring the Heartbeat UDP Interface
Note
Cisco strongly recommends you do not use the serial interface on the NAC-3315/3355/3395 for the HA
heartbeat function. Although this element still appears in the CAM web console, the
Heartbeat Serial
Interface feature is being deprecated in a future Cisco NAC Appliance release. (The associated
Heartbeat Timeout value remains a valid configuration point, however, for deployments using optional
Heartbeat UDP interfaces 2 and 3.)
The Heartbeat UDP interface, if specified, is used to send UDP heartbeat traffic related to high
availability. The interface used depends on the interfaces available on the server machine and the load
level expected. This interface can use either a dedicated Ethernet interface (such as eth2 or eth3) or the
trusted interface eth0, if a dedicated interface is not available.
When using an additional Ethernet interface, you must manually configure the interface using the CAS
CLI. There are no eth2 or eth3 configuration settings (IP address, netmask, etc.) available via the CAS
web console. For instructions, see
Configuring Additional NIC Cards, page 3-37 . When a dedicated
interface is used, the dedicated interfaces on both machines should be connected using a crossover cable.
Servers running a CAS typically use both available interfaces (eth0 and eth1), with eth0 configured as
the trusted network interface. Cisco recommends using the eth2 and eth3 interfaces for heartbeat
redundancy, thus freeing up the eth0 and eth1 interfaces to handle Cisco NAC Appliance traffic.