ServerIron ADX Global Server Load Balancing Guide 217
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Advanced GSLB configuration for IPv6 2
Configuring a geographic prefix
Using the geo-prefix command, you can configure the geographic location of an IP address prefix,
or override an existing geographic region for an IP address prefix by configuring a new one.
You can assign one of the following geographic locations to an IP address prefix:
•North America
•South America
•Europe
•Asia
•Africa
To configure a geographic prefix, enter commands such as the following:
GSLB-ServerIronADX# configure terminal
GSLB-ServerIronADX(config)# gslb policy
GSLB-ServerIronADX(config-gslb-policy)# geo-prefix 2001.db8::/64 asia
GSLB-ServerIronADX(config-gslb-policy)# end
These commands create a geographic prefix entry with IPv6 address 2001.db8::, prefix length 64,
and geographic region Asia.
Syntax: [no] geo-prefix <ipv6-prefix> [asia | europe | n-america | s-america | africa]
The command configures an association between a prefix and a geographic location. The
<ipv6-prefix> variable identifies the respective networks. Five operands serve as location tags for
the network: asia, europe, n-america, s-america, and africa.
NOTE
When a geographic prefix is converted from static to dynamic through geographic prefix
configuration, the old geographic prefix information will be replaced with the new information. If the
prefix is deleted, the old value will not be restored because it has already been replaced.
Specifying site locations
By default, the GSLB ServerIron ADX uses a site’s IP address to determine its geographic location.
Alternatively, you can explicitly specify the location, by entering commands such as the following:
ServerIronADX(config)# gslb site us
ServerIronADX(config-gslb-site-us)# geo-location n-america
Syntax: [no] geo-location asia | europe | n-america | s-america | africa
Specifying GSLB controller locations
By default, the GSLB controller is assigned to the North America geographic. Specify the GSLB
controller location by entering commands such as the following at the global configuration level:
ServerIronADX(config)# gslb default-location asia
ServerIronADX(config)# write memory
The command specifies “asia” as the default location of the GSLB controller.
Syntax: [no] gslb default-location asia | europe | n-america | s-america | africa