Brocade Communications Systems ServerIron ADX 12.4.00 - Manual (Page 216)

204 ServerIron ADX Global Server Load Balancing Guide
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Advanced GSLB configuration for IPv6
2
Configuring GSLB policy metrics for IPv6
The GSLB ServerIron ADX supports global server load balancing of IPv6 addresses in cache proxy
with DNS override mode. In this mode, The GSLB ServerIron ADX evaluates each IP address in the
IP list based on the configured policy metrics and places the best IP address on the top of the IP list
in the response.
Table 18 lists the GSLB policy metrics used to load balance IPv6 addresses. The metrics are listed
in their default order. If the GSLB controller is unable select the best IP address based on a metric,
the candidate IP addresses are passed on to the next step in the GSLB algorithm, where the
process of selecting the best IP address continues.
Configuring hash-based persistence for IPv6 page 225
Configuring weighted hash-based persistence for IPv6 page 226
DNS response parameters
Configuring an active-only policy (optional) page 229
Configuring an best-only policy (optional) page 230
TABLE 18 GSLB policy metrics for IPv6
Metric Default Configuration options
Server (host) health Enabled.
The GSLB ServerIron 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 ServerIron ADX.
NOTE: If all the sites fail their health
checks, resulting in all the
sites being rejected by the
GSLB ServerIron ADX, the
ServerIron 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 is disabled, the
ServerIron ADX does not
perform any Layer 4 or Layer
7 health checks.
Refer to “Server (host) health
metric” on page 208.
Weighted IP address Disabled.
When enabled, the ServerIron ADX
distributes GSLB traffic among IP
addresses in the IP list based on
weights assigned to the IP
addresses. You can disable this metric.
You can enable this metric and
assign weights to individual IP
addresses. The weight can be a
value from 0 to 100. The default
value is 0.
Refer to
“Weighted IP metric” on
page 209.
TABLE 17 Advanced GSLB for IPv6 configuration tasks
Feature See page...