Brocade Communications Systems 12.4.00 manual Connection load

1	Configuring GSLB protocol parameters
		TABLE 2	GSLB policy metrics (Continued)
		Metric		Default	Configuration options
		Connection load		Disabled.	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.

Available session capacity	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.

You can change the tolerance to a value from 0-100%.

You also can disable this metric.

FlashBack speed (how quickly the GSLB receives the Layer 4 TCP and Layer 7 health check results)

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.

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.

Administrative preference	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.

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.

Least Response selection (the site	Enabled.	Not configurable.
ServerIron ADX that has been
selected less often than others)
Round robin selection	Disabled.	Not configurable.
	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.

36	ServerIron ADX Global Server Load Balancing Guide
	53-1002437-01