Brocade Communications Systems 12.4.00 manual Changing the order of Gslb for IPv6 policy metrics

2	Advanced GSLB configuration for IPv6
		TABLE 18	GSLB policy metrics (Continued)for IPv6
		Metric		Default	Configuration options
		FlashBack speed		Disabled.	You also can disable this metric.
				The default tolerance is 10%. This	You can change the TCP and
				applies to the TCP health check and	application tolerances individually. A
				application health checks.	change applies to all the TCP ports
				When comparing sites based on the	or applications at the remote site.
				FlashBack speed, the GSLB	Refer to “FlashBack speed metric”
				ServerIron ADX will prefer one site	on page 219.
				over the other only if the FlashBack
				speeds differ by more than the
				specified tolerance.

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.

Refer to “Administrative preference metric” on page 220.

Least response selection	Enabled.	Not configurable.
	The GSLB controller selects the site	Refer to “Least response selection
	ServerIron ADX that has been	metric” on page 221.
	selected less often than others.
Round robin selection	Disabled.	Not configurable.
	When round robin selection is	Refer to “Round robin selection
	enabled, the least response	metric” on page 221.
	selection metric 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.

All of these metrics have default values but you can change the values if needed. In addition, you can disable individual metrics or reorder them. Refer to “Changing the GSLB policy metrics” on page 34.

GSLB ServerIron ADX does not currently support the following GSLB policy metrics for IPv6 addresses:

•Active and passive round-trip time

•Connection load

Changing the order of GSLB for IPv6 policy metrics

You can change the order in which the GSLB ServerIron ADX applies the policy metrics.

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