Brocade Virtual ADX Global Server Load Balancing Guide (Supporting ADX v03.1.00) - Manual (Page 44)

34 Brocade Virtual ADX Global Server Load Balancing Guide
53-1003245-01
Configuring GSLB protocol parameters
1
TABLE 2 GSLB policy metrics
Metric Default Configuration options
Server (host) health Enabled.
The GSLB Brocade Virtual ADX
performs Layer 4 health checks on
the TCP or UDP port and Layer 7
health checks on the application, if
the application is known to the
Brocade Virtual ADX.
NOTE: If all the sites fail their health
checks, resulting in all the
sites being rejected by the
GSLB Brocade Virtual ADX,
the Brocade Virtual ADX
sends the DNS reply
unchanged to the client.
You can disable this metric.
NOTE: When both the health check
metric and the Flashback
metric are disabled, the
Brocade Virtual ADX does
not perform any Layer 4 or
Layer 7 health checks.
Weighted IP metric Disabled.
When enabled, the Brocade Virtual
ADX distributes GSLB traffic among
IP addresses in a DNS reply, based
on weights assigned to the IP
addresses. You can enable this metric and
assign weights to individual IP
addresses. The weight can be from
0 to 100. The default is 0.
You can disable this metric.
Weighted Site metric Disabled.
When the Weighted IP metric is
enabled, the Weighted Site metric is
disabled. The Weighted Site metric
is an alternative to the Weighted IP
metric. They are mutually exclusive.
When enabled, the Brocade Virtual
ADX distributes SLB traffic among
GSLB sites based on weights
configured for the sites. You can enable this metric and
assign weights to individual sites.
The weight can be from 0 to 100.
The default is 0.
You can disable this metric.
Session capacity threshold Enabled.
The default value for the threshold is
90%. Thus a site Brocade Virtual
ADX is eligible to be the best site
only if its session utilization is below
90%. You can change the threshold to a
value from 0 – 100%.
You can disable this metric.
Active Bindings metric Disabled.
When enabled, the Brocade Virtual
ADX selects an IP address with the
highest number of active bindings
as the best IP address for the client. You can enable and disable this
metric.
Geographic location Enabled. You can disable this metric.
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.