Gslb Optimization; Optimized Vip List Processing; Increased Vip Support Per Site And Reduced Cpu Usage On Gslb Controller - Brocade Communications Systems ServerIron ADX 12.4.00 Manual Manual

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GSLB optimization

Client LDNS 2.1.1.53 sends a DNS request to GSLB ServerIron ADX for www.foo.com. GSLB
ServerIron ADX rearranges the DNS reply as follows.
1. It checks if there is any affinity definition associated with the client LDNS network. In this
2. Since it does not find any such VIP, it then checks if ServerIron ADX 2.1.1.104 is a part of GSLB
3. It then checks if there is any IP address in the reply that is a VIP on 2.1.1.103. It finds IP
GSLB optimization
A site ServerIron ADX sends a list of GSLB enabled VIPs to the GSLB controller on a periodic basis.
If distributed health checks is enabled on the site ServerIron ADX, 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

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.
ServerIronADX(config)# gslb process-vip-list-optimize
Syntax: [no] gslb process-vip-list-optimize
NOTE
This command requires a reload to take effect.
Increased VIP support per site and reduced CPU usage on GSLB
controller
Through use of the VIP List Optimize feature the maximum number of GSLB-enabled VIPs
supported per site is 1024 VIPs per site.
Use the following commands on controller and site to avail this functionality.
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example, it finds that there is a definition associating network 2.1.1.0/24 with ServerIron ADX
2.1.1.104. So it checks if there is any IP address in the reply which is a VIP configured on
ServerIron ADX 2.1.1.104 and is in the active (A) state on that ServerIron ADX.
HA group. In this example, it is a part of a HA group and its HA peer is ServerIron ADX
2.1.1.103.
address 2.1.1.23 in the DNS reply that is a VIP in the active (A) state on ServerIron ADX
2.1.1.103 and selects this as the best IP address for client LDNS 2.1.1.53.
"Optimized VIP list processing"

"Increased VIP support per site and reduced CPU usage on GSLB controller"

on page 162.)
ServerIron ADX Global Server Load Balancing Guide
on page 162)
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