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C H A P T E R 2
HP Traffic Director Server Appliances User Guide
24
Primary and Backup Servers
Each server is identified as either a Primary or Backup for a given
service. Primary servers are always considered first for request
fulfillment. By default, Backup servers are considered for use only if
a primary server goes down, though they can optionally be
configured for use to maintain target response times. A server’s type
is established with the following command:
config policygroup <name> service <name> server
<name> port <port> type [primary | backup]
Backup servers are enabled to maintain target response times with the
following command:
config policygroup <name> service <name> backups
[enable | disable]
Server
Configuration
Options
Source Address Preservation
By default, brokered service requests arriving at a fulfillment server
appear to the server as requests originating from the SA8220.
Consequently, server log files record the SA8220 as the source of
these requests. When Source Address Preservation (SAP) is enabled
however, the SA8220 preserves the original source addresses of
requests delivered to the server farm. If you use the log files from
your server farm to gather information based on client source
addresses, use Source Address Preservation. SAP is controlled with
the following command:
config policygroup <name> service <name> server
<name> port <port> mode [sap]
NOTE: For the SA8220
to operate in SAP mode,
the default gateway for
each SAP-enabled server
must be set to the
SA8220’s physical IP
address, not the VIP.
SAP cannot be used in WAN or multiple router LAN environments.
To use SAP, each server must be configured so that its default
gateway is set to the physical IP address of the SA8220, thus there can
be no routers between the SA8220 and the fulfillment servers.
Limitations of SAP mode operation are listed below:
•
The client machine cannot be on the same subnet as the SA8220.
•
The SA8220 and server must be on the same subnet.
When SAP is enabled, serial cable failover is the only failover
option—routing failover is not available.
Содержание P4522A - Traffic Management Server Sa8220
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Страница 52: ...C H A P T E R 2 HP Traffic Director Server Appliances User Guide 40 Notes ...
Страница 258: ...C H A P T E R 7 HP Traffic Director Server Appliances User Guide 246 Notes ...
Страница 280: ...A P P E N D I X B HP Traffic Director Server Appliances User Guide 268 Notes ...
Страница 284: ...A P P E N D I X C HP Traffic Director Server Appliances User Guide 272 Notes ...
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Страница 321: ...Regulatory Information Taiwan Class A EMI Statement VCCI Class A Japan ...
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