HP Multi-Site Traffic Director sa9200 - Manual (Page 136)

C H A P T E R 6 HP Multi-Site Traffic Director Server Appliance SA9200 User Guide
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Config DNS Flash Commands
Command Description
config dns flash Changes the prompt to the config dns flash command level.
info Displays flash configuration information.
For example:
Flash Information:
Flash State: Disabled Aliasing: Disabled
Polling Interval: 10 Number of Polls: 100
Max Broadcast Delay: 500 Drop Misses: 3
Aliasing: With multiple SA9200s, Flash responses can pass
through a firewall because of the aliasing of source IPs.
Polling Interval: How frequently Flash Peers are polled to
determine the network latency
Number of Polls: The number of Flash Peer polls to be used in
calculating the average network latency between Flash Peers. The
more polls, the slower the SA9200 reacts to bursts of network
congestion; but it is also slower to recover from long periods of
congestion.
Max Broadcast Delay: The maximum amount of time that a
DNS response can be delayed to compensate for network latency
between Flash Peers. If exceeded, may become out of sync with
other peers.
Drop Misses: The number of consecutive chances allowed for a
response (to a poll message) before the peer SA9200 is
considered unavailable.
enable Enables Flash load balancing.
disable
NOTE: If Flash is
disabled, but the load
balancing method selected
is still ‘flash’, this results in
an unweighted random (or
‘straight’ random)
distribution.
Disables Flash load balancing.
Config DNS Flash Commands