C Ha Bypass Card; Overview; C.1 Overview - Novell ZENWORKS NETWORK ACCESS CONTROL 5.0 - 09-22-2008 User Manual

HA Bypass Card
C
The recommended method of implementing High Availability is to use a multiple-server installation
where there is one Management Server (MS) and two or more Enforcement Servers (ESs) as
described in Section 8.1, "High Availability," on page
have a single-server installation where the MS and ES are installed on the same physical server.
The HA Bypass card is optional, and for customers operating in a high-availability environment, or
in situations where in-line applications exist to prevent prolonged outages.
The following sections contain more information:
Section C.1, "Overview," on page 437
Section C.2, "Location and Connections," on page 438
Section C.3, "HA Bypass Supported," on page 438
Section C.4, "Installing the Bypass Card," on page 438
Section C.5, "Configuring the Bypass Card," on page 439
Section C.6, "Operating the Bypass Card," on page 441

C.1 Overview

The bypass card functions as a normally open switch. In the event of a problem with Novell
ZENworks Network Access Control, the card bypasses Novell ZENworks Network Access Control
in the network as shown in
Normal Operation Compared to Fail-open Operation
Figure C-1
Figure C-1 on page 437.
225. Use the HA Bypass card only if you
C
HA Bypass Card 437