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Cisco NAC Appliance Hardware Installation Guide
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Chapter 4 Configuring High Availability (HA)
Installing a Clean Access Server High Availability Pair
Configure the HA-Secondary Clean Access Server
Note
Cisco NAC network modules installed in Cisco Integrated Services Routers (ISRs) do not support high
availability.
The general sequence to configure the HA-Secondary CAS is as follows:
a. Access the HA-Secondary CAS Directly
b. Configure the Host Information for the HA-Secondary CAS
c. Configure HA-Secondary Mode and Update
d. Configure the SSL Certificate
e. Reboot the HA-Secondary CAS
a. Access the HA-Secondary CAS Directly
1.
Access the web console for the HA-Secondary CAS by opening a web browser and typing the IP
address of the trusted (eth0) interface of the HA-Secondary CAS in the URL/address field, as
follows:
https://<standby_CAS_eth0_IP_address>/admin
(for example,
https://172.16.1.3/admin
)
2.
Log in as user
admin
and provide the correct password.
Note
In order to copy and paste values to/from configuration forms, Cisco recommends keeping both web
consoles open for each CAS (primary and secondary). See also
a. Access the HA-Primary CAS Directly,
page 4-27
.
b. Configure the Host Information for the HA-Secondary CAS
3.
In the
Network Settings
page, open the
DNS
tab.
4.
Make sure the host name is a unique host name for the HA-Secondary CAS, such as “rjcas_2.” You
must have the same domain name specified in this tab as you did for the HA-Primary CAS (see
b.
Configure the Host Information for the HA-Primary CAS, page 4-27
).
Note
When configuring HA, it is mandatory to specify a Host Name for each machine in the HA-pair.
The Host Name is case-sensitive and cannot be an IP address. Host Names are needed later for
the
Local Host Name
and
Peer Host Name
fields of the HA Primary and HA Secondary
configuration. The
Local Host Name
and
Peer Host Name
do not need to be resolvable via
DNS; however, they are case-sensitive and need to match the Host Names you have specified for
the machines.
c. Configure HA-Secondary Mode and Update
5.
Click the
Failover > General
tab and select
HA-Secondary Mode
from the
Clean Access Server
Mode
dropdown menu.
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