Brocade Communications Systems ServerIron ADX 12.4.00 Manual Manual page 48

1
Configuring GSLB protocol parameters
TABLE 2
Metric
Connection load
Available session capacity
FlashBack speed (how quickly the
GSLB receives the Layer 4 TCP and
Layer 7 health check results)
Administrative preference
Least Response selection (the site
ServerIron ADX that has been
selected less often than others)
Round robin selection
36
GSLB policy metrics (Continued)
Default
Disabled.
Enabled.
The default tolerance is 10%.
When comparing sites based on the
session table utilization, the GSLB
ServerIron ADX will prefer one site
over the other only if the difference
in session table utilization is greater
than the tolerance percentage.
Disabled.
The default tolerance is 10%. This
applies to the TCP health check and
application health checks.
When comparing sites based on the
FlashBack speed, the GSLB
ServerIron ADX will prefer one site
over the other only if the FlashBack
speeds differ by more than the
specified tolerance.
Disabled.
When enabled, the default
preference is 128. The GSLB
ServerIron ADX will prefer the site
with the highest administrative
preference. If you set the preference
for a site ServerIron ADX to 0, the
site is administratively removed
from GSLB selection.
Enabled.
Disabled.
When round robin selection is
enabled, least response selection is
disabled. round robin selection is an
alternative to least response
selection. They are mutually
exclusive.
Like least response selection, round
robin selection is a tie breaker, used
only if two or more sites are equal
following comparison against all
other enabled metrics.
Configuration options
You can enable this metric.
You also can change the data
collection interval, the number of
intervals used to calculate the
connection load average, and the
relative weights of the intervals.
You can change the tolerance to a
value from 0-100%.
You also can disable this metric.
You can change the TCP and
application tolerances individually. A
change applies to all the TCP ports
or applications at the remote site.
You also can disable this metric.
You can enable this metric. On an
individual site ServerIron ADX basis,
you can change the preference from
128 (the default) to a value from
0-255.
Not configurable.
Not configurable.
ServerIron ADX Global Server Load Balancing Guide
53-1002437-01