High Availability and Load Balancing
Load Balancing
8-6
Load Balancing
Load balancing distributes the testing of endpoints across all NAC 800 ESs in
a cluster. NAC 800 uses a hashing algorithm based on MAC or IP addresses to
divide the endpoints between the ESs.
If the MAC address is unavailable (untestable endpoint) the IP address is used
to determine which ES should test an endpoint. If an ES detects an endpoint
for which it is not responsible, it notifies the correct ES of the endpoint and
that ES takes over testing.
If an ES fails, any services that are
protected
by that ES may become inacces-
sible, depending on the nature of the ES failure. However, the redundant
services that are
protected
by the other ESs are still available.
TIP:
Protected services are services that are running on any servers that sit on the
eth1 side of the failed ES, such as AD, DNS, DHCP, NTP, file server, print
server, and so on.
Summary of Contents for 800 Series
Page 1: ...Users Guide www procurve com ProCurve Network Access Controller 800 ...
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 70: ...System Configuration Management Server 3 22 Figure 3 9 System Configuration Management Server ...
Page 79: ...System Configuration User Accounts 3 31 Figure 3 12 System Configuration User Accounts ...
Page 87: ...System Configuration User Roles 3 39 Figure 3 16 System Configuration User Roles ...
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Page 229: ...End user Access Mac OS X Endpoint Settings 5 23 Figure 5 8 Mac System Preferences ...
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Page 302: ...High Availability and Load Balancing High Availability 8 4 Figure 8 2 DHCP Installation ...
Page 303: ...High Availability and Load Balancing High Availability 8 5 Figure 8 3 802 1X Installation ...
Page 305: ...9 1 9 Inline Quarantine Method Chapter Contents Inline 9 2 ...
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Page 311: ...DHCP Quarantine Method Overview 10 3 Figure 10 1 DHCP Installation ...
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Page 319: ...802 1X Quarantine Method NAC 800 and 802 1X 11 5 Figure 11 2 NAC 800 802 1X Enforcement ...
Page 320: ...802 1X Quarantine Method NAC 800 and 802 1X 11 6 Figure 11 3 802 1X Communications ...
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Page 421: ...Reports Viewing Report Details 14 7 Figure 14 3 Test Details Report ...
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Page 520: ...Tests Help Security Settings Windows B 34 http www pcworld com article id 112138 article html ...
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