Brocade Communications Systems 12.4.00 manual Displaying the user-configured Gslb policy

2	Displaying GSLB for IPv6 configurations
		TABLE 22	GSLB policy information (Continued)
		This field...		Displays...
		Round trip time tolerance		Specifies the percentage by which the RTT for one site can differ from the RTT
				for another site without this metric resulting in selection of one site over the
				other.
		Round trip time explore		Indicates the percentage of client requests from a given network for which the
		percentage		GSLB ServerIron ADX intentionally ignores the RTT metric when evaluating the
				IP addresses in the DNS reply. The explore percentage prevents the ServerIron
				ADX from continually biasing its site selection based on the first ServerIron ADX
				to return RTT information. Refer to “Modifying round-trip time values” on
				page 53.
		Round trip time cache prefix		Indicates the length (number of significant bits) of entries in the GSLB
				ServerIron ADX’s IP address cache. The prefix determines the extent to which IP
				addresses are aggregated into entries in the cache.
		Round trip time cache interval		Indicates how many seconds the GSLB ServerIron ADX keeps an unrefreshed
				RTT cache entry in its cache before the entry ages out.
		Flashback appl-level delay		Indicates the percentage of difference that can exist between application level
		tolerance		FlashBack response times for two sites, without the ServerIron ADX preferring
				one site over the other based on this metric.
		TCP-level delay tolerance		Indicates the percentage of difference that can exist between Layer 4
				FlashBack response times for two sites, without the ServerIron ADX preferring
				one site over the other based on this metric.

Displaying the user-configured GSLB policy

Use the show gslb policy command to view user-defined GSLB policy settings for the ServerIron ADX including the default processing order of the GSLB policy algorithm and the status of many optional features including the active-only and best-only DNS response parameters.

To display the user-configured GSLB policy, enter the following command.

ServerIronADX(config)# show gslb policy Default metric order: ENABLE

Metric processing order:

1-Server health check

2-Remote ServerIronADX's session capacity threshold

3-Round trip time between remote ServerIronADX and client 4-Geographic location

5-Remote ServerIronADX's available session capacity

6-Server flashback speed

7-Least response selection

DNS active-only: DISABLE		DNS best-only: DISABLE		DNS	override: DISABLE
Modify DNS	response TTL: ENABLE
DNS TTL: 10 (sec), DNS check interval: 30 (sec)
Remote ServerIronADX status update period:			30 (sec)
Session capacity threshold: 90%, session capacity				tolerance: 10%
Round trip	time tolerance: 10%, round trip		time explore		percentage: 5%	(sec)
Round trip	time cache prefix: 20, round trip time			cache	interval: 120
Flashback appl-level delay tolerance: 10%,			TCP-level delay tolerance:			10%

In this example, the default order of the policy metrics is in effect. Metrics that are disabled by default (such as the administrative preference) are not listed.

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