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Chapter 4 Configuring High Availability (HA) Installing a Clean Access Manager High Availability Pair • Cisco NAC-3310 CAMs/CASs feature a 160GB hard drive or 80GB hard drive. Both of these hard drive sizes support High Availability (HA) deployments, and you can safely deploy a 160GB model in an HA pair with an 80GB model. • You can choose to "automatically configure" the eth1 interface in the Administration > CCA Manager > Failover page, but you must manually configure other (eth2 or eth3) HA interfaces with an IP address, netmask, etc. prior to configuring HA on the CAM. Refer to Configure the HA-Primary CAM, page 4-9 for details on configuring the interfaces. • The eth1 interface can be used for heartbeat packets and database synchronization. The eth0, eth1, and eth2/eth3 interfaces can be used for heartbeat packets. In addition, any available serial (COM) interface can also be used for heartbeat packets. If using more than one of these interfaces, then all the heartbeat interfaces need to fail for failover to occur. Note If you are configuring your CAM for HA, you must use eth1 for heartbeat and database synchronization. All other Ethernet interfaces (eth0 and eth2/eth3) can be used only for heartbeat packets. Note In CAM HA, when heartbeat is configured on multiple interfaces and eth1 is down, the standby CAM fails to do the database synchronization. The perfigo service is stopped on the standby CAM as the database synchronization happens only on eth1, which is down. Cisco recommends using only eth1 as heartbeat interface for CAM HA instead of using multiple HA interfaces. Note When deploying the CAM/CAS across a WAN, you must prioritize all CAM/CAS traffic and SNMP traffic, and include the eth0/eth1 IP addresses of the CAM and CAS in addition to the Service IP address for HA pairs. The prioritization can have a 256 kpbs bandwidth with roudtrip delayof 400ms. Caution The connection between HA pairs must be extremely reliable, with communication between HA pairs unimpeded. The best practice is to use a dedicated Ethernet cable. Breaking communication between HA pairs will result in two active nodes, which can have serious negative operational consequences. A key aspect of the link between HA pairs is the ability to restore that link should it go down; restoration may be fundamental to network stability, depending on your design. OL-20326-01 Cisco NAC Appliance Hardware Installation Guide 4-5

Section	Page
Cisco NAC Appliance Hardware Installation Guide	1
Contents	3
About This Guide	9
Cisco NAC Appliance Hardware Platforms	15
About Cisco NAC Appliance	15
FIPS 140-2 Compliant and Non-FIPS Hardware Platforms	15
NAC-3315, NAC-3355, and NAC-3395	17
NAC-3315 Serial Number Location	19
Cisco NAC-3315 Front and Rear Panels	19
Front Panel Features	19
Rear Panel Features	20
NAC-3355 Serial Number Location	22
Cisco NAC-3355 Front and Rear Panels	22
Front Panel Features	22
Rear Panel Features	24
NAC-3395 Serial Number Location	26
Cisco NAC-3395 Front and Rear Panels	26
Front Panel Features	26
Rear Panel Features	28
NAC-3310, NAC-3350, and NAC-3390	30
Cisco NAC-3310 Front and Rear Panels	32
Front Panel Features	32
Rear Panel Features	34
Cisco NAC-3350 Front and Rear Panels	35
Front Panel Features	35
Rear Panel Features	37
Cisco NAC-3390 Front and Rear Panels	38
Front Panel Features	39
Rear Panel Features	40
Cisco Product Identification Tool	41
Preparing for Installation	43
Safety Guidelines	44
General Precautions	44
Safety with Equipment	45
Safety with Electricity	45
Preventing Electrostatic Discharge Damage	47
Lifting Guidelines	47
Preparing Your Site for Installation	48
Site Planning	48
Rack Installation Safety Guidelines	49
Four-Post (Partially-Enclosed) Rack	49
Four-Post (Open) Rack	49
Site Environment	50
Airflow Guidelines	51
Temperature and Humidity Guidelines	51
Power Considerations	51
Method of Procedure	52
Shipping Package Contents	52
Failover Bundles	53
Required Equipment	53
Configuration Worksheets	53
Clean Access Manager (CAM) Configuration Worksheet	54
Clean Access Server (CAS) Configuration Worksheet	54
CAS Mode IP Addressing Considerations	55
Rack-Mounting Your Cisco NAC Appliance CAM/CAS	56
Mounting the NAC-3315 Appliance in a 4-Post Rack	57
NAC-3315 4-Post Rack-Mount Hardware Kit	57
Installing the NAC-3315 Slide Rails into a Rack	58
Installing the NAC-3315 Appliance into the Slide Rails	61
Mounting the NAC-3355/3395 Appliance in a Four-Post Rack	63
NAC-3355/3395 4-Post Rack-Mount Hardware Kit	64
Installing the NAC-3355/3395 Slide Rails Into the 4-Post Rack	64
Installing the NAC-3355/3395 Appliance Into the Slide Rails	67
Cisco NAC Appliance Licensing	68
Upgrading Cisco NAC Appliance Software	69
Downloading Cisco NAC Appliance Software	70
Upgrading Firmware	70
Installing the Clean Access Manager and Clean Access Server	71
Overview	71
Important Release Information	72
Installing the Clean Access Manager	72
Overview	72
Summary of Steps For New Installation	73
Connect the Clean Access Manager	74
Install the Clean Access Manager (CAM) Software from CD-ROM	75
Perform the Initial CAM Configuration	76
Configuration Utility Script	76
Access the CAM Web Console	81
Install CAM License	83
Add Additional Licenses	85
Important Notes for SSL Certificates	87
Installing the Clean Access Server	88
Overview	88
Switch/Router Configuration	88
Virtual Gateway Mode Connection Requirements	89
Switch Support for CAS Virtual Gateway/VLAN Mapping (IB and OOB)	90
Determining VLANs For Virtual Gateway	90
Summary of Steps For New Installation	91
Connect the Clean Access Server	92
Install the Clean Access Server (CAS) Software from CD-ROM	92
Perform the Initial CAS Configuration	94
Configuration Utility Script	94
Important Notes for SSL Certificates	103
Cisco NAC Appliance Connectivity Across a Firewall	104
Configuring the CAS Behind a NAT Firewall	106
Connectivity Across a Wide Area Network	107
Configuring Additional NIC Cards	107
Serial Connection to the CAM and CAS	109
Configuring Boot Settings on the Cisco NAC Appliance CAM/CAS	110
Useful CLI Commands for the CAM/CAS	112
CAM CLI Commands	112
CAS CLI Commands	113
CAS CLI Commands for Cisco NAC Appliance	113
CAS CLI Commands for Cisco NAC Profiler	114
Manually Restarting the CAM/CAS Configuration Utility	116
Troubleshooting the Installation	117
Verify/Change Current Master Secret on CAM/CAS	118
Recover From Corrupted Master Secret	118
Network Interface Card (NIC) Driver Not Supported	119
Resetting and Restoring an Unreachable Clean Access Server	119
Enabling TLSv1 on Internet Explorer Version 6	119
Powering Down the NAC Appliance	120
Configuring High Availability (HA)	121
Adding High Availability Cisco NAC Appliance To Your Network	121
Installing a Clean Access Manager High Availability Pair	123
CAM High Availability Overview	124
Before Starting	127
Connect the Clean Access Manager Machines	128
Serial Connection	129
Configure the HA-Primary CAM	129
Configure the HA-Secondary CAM	132
Complete the Configuration	136
Upgrading an Existing Failover Pair	136
Failing Over an HA-CAM Pair	136
Accessing High Availability Pair CAM Web Consoles	137
Determining Active and Standby CAM	137
Determining Primary and Secondary CAM	137
Installing a Clean Access Server High Availability Pair	137
CAS High Availability Overview	138
Failover Events	141
Choosing External IPs for Link-Based Failover	142
CAS High Availability Requirements	142
Physical Connection	142
Switch Interfaces for OOB Deployment	143
Service IP Addresses	143
Host Names	143
DHCP Synchronization	143
SSL Certificates	143
Before Starting	144
Selecting and Configuring the Heartbeat UDP Interface	145
Serial Port High-Availability Connection	146
Configure High Availability	146
Configure the HA-Primary Clean Access Server	147
a. Access the HA-Primary CAS Directly	147
b. Configure the Host Information for the HA-Primary CAS	147
c. Configure HA-Primary Mode and Update	148
d. Configure the SSL Certificate	152
e. Reboot the HA-Primary CAS	153
f. Add the CAS to the CAM Using the Service IP	153
Configure the HA-Secondary Clean Access Server	154
a. Access the HA-Secondary CAS Directly	154
b. Configure the Host Information for the HA-Secondary CAS	154
c. Configure HA-Secondary Mode and Update	154
d. Configure the SSL Certificate	158
e. Reboot the HA-Secondary CAS	158
Connect the Clean Access Servers and Complete the Configuration	158
Failing Over an HA-CAS Pair	159
Modifying CAS High Availability Settings	160
To Change IP Settings for an HA-CAS	160
Upgrading an Existing Failover Pair	161
Configuring High Availability for Virtual Gateway Mode	162
Useful CLI Commands for HA	163
Clean Access Manager	163
Verifying Active/Standby Runtime Status on the HA CAM	163
Clean Access Server	164
HA CAS Configuration Status	164
Heartbeat/Link-Based Connections	164
Link-Detect Interfaces	165
Active/Standby Status	165
Accessing High Availability Pair CAS Web Consoles	166
Determining Active and Standby CAS	166
Determining Primary and Secondary CAS	166
Password Recovery	167
Recovering Root Password for CAM/CAS	167
Recovering Root Password for CAM/CAS (Release 3.5.x or Below)	167
Open Source License Acknowledgements	169
Notices	169
OpenSSL/Open SSL Project	169
License Issues	169

Match case Limit results 1 per page

4-5

Cisco NAC Appliance Hardware Installation Guide

OL-20326-01

Chapter 4

Configuring High Availability (HA)

Installing a Clean Access Manager High Availability Pair

•

Cisco NAC-3310 CAMs/CASs feature a 160GB hard drive or 80GB hard drive. Both of these hard

drive sizes support High Availability (HA) deployments, and you can safely deploy a 160GB model

in an HA pair with an 80GB model.

•

You can choose to “automatically configure” the eth1 interface in the

Administration

CCA

Manager > Failover

page, but you must manually configure other (eth2 or eth3) HA interfaces with

an IP address, netmask, etc. prior to configuring HA on the CAM. Refer to

Configure the

HA-Primary CAM, page 4-9

for details on configuring the interfaces.

•

The eth1 interface can be used for heartbeat packets and database synchronization. The eth0, eth1,

and eth2/eth3 interfaces can be used for heartbeat packets. In addition, any available serial (COM)

interface can also be used for heartbeat packets. If using more than one of these interfaces, then all

the heartbeat interfaces need to fail for failover to occur.

Note

If you are configuring your CAM for HA, you must use eth1 for heartbeat and database synchronization.

All other Ethernet interfaces (eth0 and eth2/eth3) can be used only for heartbeat packets.

Note

In CAM HA, when heartbeat is configured on multiple interfaces and eth1 is down, the standby CAM

fails to do the database synchronization. The perfigo service is stopped on the standby CAM as the

database synchronization happens only on eth1, which is down. Cisco recommends using only eth1 as

heartbeat interface for CAM HA instead of using multiple HA interfaces.

Note

When deploying the CAM/CAS across a WAN, you must prioritize all CAM/CAS traffic and SNMP

traffic, and include the eth0/eth1 IP addresses of the CAM and CAS in addition to the Service IP address

for HA pairs. The prioritization can have a 256 kpbs bandwidth with roudtrip delayof 400ms.

Caution

The connection between HA pairs must be extremely reliable, with communication between HA pairs

unimpeded. The best practice is to use a dedicated Ethernet cable. Breaking communication between HA

pairs will result in two active nodes, which can have serious negative operational consequences. A key

aspect of the link between HA pairs is the ability to restore that link should it go down; restoration may

be fundamental to network stability, depending on your design.