ServerIron ADX Global Server Load Balancing Guide 111
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Enabling DNS request logging 1
The GSLB ServerIron ADX does not support the distributed health check feature, so the distributed
health check configuration is neither supported nor applicable to the GSLB ServerIron ADX. The
non-distributed health check GSLB ServerIron ADX and the distributed health check site ServerIron
ADXs inter-operate without any special configuration; that is, no mandatory configuration is
required to make them compatible.
Health check status interval configuration on the site ServerIron ADX does not apply to this
topology. Flashback metric is enabled by default.
Example 4
In this example:
•The GSLB ServerIron ADX supports the distributed health check feature.
•Site ServerIron ADXs 1.1.1.105, ServerIron ADX 1.1.1.106 and ServerIron ADX 1.1.1.107 and
ServerIron ADX 1.1.1.108 all belong to site “sunnyvale”.
•All the site ServerIron ADXs support the distributed health check feature.
If both the GSLB ServerIron ADX and the site ServerIron ADX support the distributed health check
feature, then distributed health checking is enabled by default between them. In order to disable
the distributed health check feature between distributed health check GSLB ServerIron ADX and
distributed health check site ServerIron ADX, say ServerIron ADX 1.1.1.106, configure the following
on the GSLB ServerIron ADX.
ServerIronADX(config)# gslb site sunnyvale
ServerIronADX(config-gslb-site-sunnyvale)# si-name 1.1.1.106
no-si-dist-health-check
ServerIronADX(config-gslb-site-sunnyvale)# end
This will disable distributed health check feature between GSLB ServerIron ADX and site ServerIron
ADX 1.1.1.106 and now GSLB ServerIron ADX will carry out GSLB health checks for host servers
being load balanced by site ServerIron ADX 1.1.1.106. Note that the distributed health check
feature is still enabled between the GSLB ServerIron ADX and ServerIron ADXs 1.1.1.105, 1.1.1.107
and 1.1.1.108.