Connect The Clean Access Servers And Complete The Configuration - Cisco NAC3350-PROF-K9 - NAC Profiler Server Installation Manual

Installing a Clean Access Server High Availability Pair
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d. Configure the SSL Certificate
7.
If using a temporary certificate for the HA pair:
If using a CA-signed certificate for the HA pair:
For more information, see the "Manage CAS SSL Certificates" section in the
Clean Access Server Configuration Guide, Release
e. Reboot the HA-Secondary CAS
8.

Connect the Clean Access Servers and Complete the Configuration

1.
Cisco NAC Appliance Hardware Installation Guide
4-38
Heartbeat Timeout (seconds): Choose a value greater than 15 seconds.
To avoid a potentially serious network issue where two CASs deployed as an HA pair reboot
Note
at the same time (in the event power returning after an outage, for example) and both come
up as the active CAS in the HA pair, Cisco recommends setting the Heartbeat Timeout to
a value greater than 30 seconds. The possible network implication in this scenario is that the
to "active" CASs can introduce a Layer 2 broadcast loop that almost immediately brings
down the network.
Another method you can use to avoid this scenario is to ensure you use an additional
Ethernet interface link (eth2, eth3) for heartbeat monitoring between your CAS Ha pair
nodes. See Heartbeat UDP Interface 2 and Heartbeat UDP interface 3, above and
Configuring Additional NIC Cards, page
Update: Click to update the HA configuration information for the CAS without rebooting it.
Reboot: This is used to reboot the CAS at the end of HA-Primary CAS configuration. (Do not click
Reboot at this point.)
Now configure the SSL certificate for the HA-Secondary CAS. Navigate to Administration > SSL
> X509 Certificate and perform one of the following procedures:
Click Browse and navigate to the location on your local machine where you have saved the
a.
temporary certificate and Private Key you previously exported from the HA-Primary CAS.
Select the certificate file and click Import.
b.
Repeat the process to import the Private Key.
c.
a. Click Browse and navigate to the location on your local machine where you have saved the
CA-signed certificate you received from your Certificate Authority and the associated Private
Key you exported from the HA-Primary CAS and saved to your local machine.
Select the CA-signed certificate file and click Import.
b.
Repeat the process to import the Private Key.
c.
From the CAS direct access interface (Network Settings > Failover > General), click the Reboot
button to reboot the Clean Access Server.
Shut down the HA-Primary CAS machine and connect the
serial null modem cable (connecting available serial ports) and/or a crossover cable (connecting
Ethernet ports if using a pair of Ethernet interfaces such as eth2 or eth3 for failover).
Chapter 4 Configuring High Availability (HA)
3-37, for more information.
4.8(3).
and
rjcas_1 rjcas_2
Cisco NAC Appliance -
machines using a
OL-20326-01