High Availability and Load Balancing
High Availability
8-2
High Availability
High availability occurs when one or more ESs takes over for an ES that has
become unavailable in a multiple-server installation.
Once an ES becomes unavailable, the other ESs take over enforcement from
the ES that is now unavailable. All ESs participate in enforcement. The MS
provides notification in the user interface at the top of the
Home
window. For
example, if an ES is unavailable, the notification indicates that at the top of
the
Home
window.
When NAC 800 is installed inline in a multiple-server configuration (figure 8-
1), the multiple ESs form a network loop (an undesired condition). The
Spanning Tree Protocol (STP) detects the loop and closes one of the offending
Summary of Contents for ProCurve NAC 800
Page 1: ...HP ProCurve Network Access Controller 800 Users Guide ...
Page 2: ......
Page 3: ...ProCurve Network Access Controller 800 Release 1 1 Users Guide ...
Page 43: ...2 1 2 Clusters and Servers Chapter Contents Overview 2 2 Installation Examples 2 3 ...
Page 71: ...System Configuration Management Server 3 23 Figure 3 9 System Configuration Management Server ...
Page 80: ...System Configuration User Accounts 3 32 Figure 3 12 System Configuration User Accounts ...
Page 88: ...System Configuration User Roles 3 40 Figure 3 16 System Configuration User Roles ...
Page 180: ... This page intentionally left blank ...
Page 208: ... This page intentionally left blank ...
Page 234: ...End user Access Mac OS X Endpoint Settings 5 26 Figure 5 14 Mac System Preferences ...
Page 288: ... This page intentionally left blank ...
Page 302: ... This page intentionally left blank ...
Page 306: ...High Availability and Load Balancing High Availability 8 4 Figure 8 2 DHCP Installation ...
Page 307: ...High Availability and Load Balancing High Availability 8 5 Figure 8 3 802 1X Installation ...
Page 309: ...9 1 9 Inline Quarantine Method Chapter Contents Inline 9 2 ...
Page 312: ... This page intentionally left blank ...
Page 315: ...DHCP Quarantine Method Overview 10 3 Figure 10 1 DHCP Installation ...
Page 318: ... This page intentionally left blank ...
Page 323: ...802 1X Quarantine Method NAC 800 and 802 1X 11 5 Figure 11 2 NAC 800 802 1X Enforcement ...
Page 324: ...802 1X Quarantine Method NAC 800 and 802 1X 11 6 Figure 11 3 802 1X Communications ...
Page 380: ... This page intentionally left blank ...
Page 418: ... This page intentionally left blank ...
Page 425: ...Reports Viewing Report Details 14 7 Figure 14 3 Test Details Report ...
Page 459: ...System Administration Creating and Replacing SSL Certificates 15 31 10 Save and exit the file ...
Page 468: ... This page intentionally left blank ...
Page 480: ... This page intentionally left blank ...
Page 526: ...Tests Help Security Settings Windows B 34 http www pcworld com article id 112138 article html ...
Page 532: ... This page intentionally left blank ...
Page 562: ... This page intentionally left blank ...