Download Brocade Virtual Traffic Manager: User's Guide, 10.1

Global Load Balancing
Extending the Traffic Manager's GeoIP Database
In the above example:

"-t any": requests any type of record (A, NS, CNAME, PTR, and so on).

"+norec": indicates that the request should be sent with the recursive flag set to
"off".

"www.example.com": the record you are testing.

"@192.0.2.1": the name server that the request is sent to.
When testing a DNS server or service, it is very important that you always perform
non-recursive queries. This ensures that you receive either an authoritative answer
or that you know exactly which name servers are authoritative for the domain name
you are trying to resolve. You do not receive an answer that the name server you are
querying has looked up for you (since you cannot always verify the source of that
information).
Extending the Traffic Manager's GeoIP Database
The Traffic Manager contains a GeoIP database that maps IP addresses to location longitude and latitude, city, county and country. GLB uses this GeoIP database to
estimate distances between remote users and local datacenters.
You can access the database directly using the included geo.* TrafficScript and Java
functions. For example, to discover the 2-letter country code that a site visitor is
accessing from, use the following TrafficScript:
$ip = request.getRemoteIP();
$countryCode = geo.getCountryCode( $ip );
The Traffic Manager uses a database derived from MaxMind's GeoLite City database
(http://dev.maxmind.com/geoip/legacy/geolite/). Brocade updates this database with
each Traffic Manager release, however you can update to a later version manually
using an upgrade package.
See the Brocade Community Web site for more information at
http://community.brocade.com.
Unrecognized IP Addresses
The database does not include locations for private IP address ranges (see RFC1918),
and other IP address ranges might be missing or inaccurate if they were recently
allocated or moved. This section provides information on how you can extend the
internal GeoIP database to add or override IP address ranges.
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Brocade Virtual Traffic Manager: User's Guide