Brocade Virtual ADX Global Server Load Balancing Guide (Supporting ADX v03.1.00) - Manual (Page 111)

Brocade Virtual ADX Global Server Load Balancing Guide 101
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GSLB optimization
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4. After you configure a geographic location for the prefix, the GSLB Brocade Virtual ADX updates
the geographic location for the IP addresses as explained in the section “How geographic
location is determined” on page 97.
5. To view the geographic location of the IP addresses, enter the show gslb dns detail command.
The above output shows that the geographic location is Asia. The geographic location for
10.10.10.200 is still North America (N-AM) because it does not match the user-configured
geographic prefix.
GSLB optimization
A site ADX device sends a list of GSLB enabled VIPs to the GSLB controller on a periodic basis. If
distributed health checks is enabled on the site ADX device, then this list would also include the
health status of the VIP ports.
The following two procedures are used to optimize GSLB processes:
• “Optimized VIP list processing” on page 101.
• “Increased VIP support per site and reduced CPU usage on GSLB controller” on page 102.
Optimized VIP list processing
The GSLB controller can optionally be enabled to process the VIPlist from the controller in a more
optimal manner. This mechanism reduces CPU usage on controller.
The feature can be enabled by issuing following command at the global config level.
Virtual ADX(config)#gslb process-vip-list-optimize
Syntax: [no] gslb process-vip-list-optimize
NOTE
This command requires a reload to take effect.
Virtual ADX#show gslb dns detail
ZONE: example12.com
HOST: www:
(Global GSLB policy)
Flashback DNS resp.
delay selection
(x100us) counters
TCP APP Count (%)
* 10.1.1.22: dns real-ip ACTIVE ASIA 5 16 ---
* 10.10.10.200: dns real-ip DOWN N-AM -- -- ---
* 10.1.1.76: dns v-ip DOWN ASIA -- -- ---
site: local, weight: 0, Virtual ADX: 10.1.1.102
session util: 0%, avail. sessions: 5999976
preference: 128
* 10.1.1.101: dns v-ip ACTIVE ASIA 0 0 ---
Active Bindings: 1
site: local, weight: 0, Virtual ADX: 10.1.1.102
session util: 0%, avail. sessions: 5999976
preference: 128