Brocade Virtual ADX Global Server Load Balancing Guide (Supporting ADX v03.1.00) - Manual (Page 4)

iv Brocade Virtual ADX Global Server Load Balancing Guide
53-1003245-01
Site persistence in GSLB using stickiness. . . . . . . . . . . . . . . . . . . . .59
Algorithm . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .60
Enabling sticky GSLB . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61
Allowing sticky sessions for a specific prefix length . . . . . . . . . 61
Configuring the sticky GSLB session life time . . . . . . . . . . . . . . 61
Displaying current sticky GSLB sessions . . . . . . . . . . . . . . . . . .62
Sticky GSLB counters. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .63
Deleting sticky GSLB session for a specific client . . . . . . . . . . .65
Deleting all sticky GSLB sessions . . . . . . . . . . . . . . . . . . . . . . . .65
DNS cache proxy . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .65
Enabling DNS cache proxy. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .66
Displaying DNS cache proxy state . . . . . . . . . . . . . . . . . . . . . . .66
Displaying DNS cache proxy statistics . . . . . . . . . . . . . . . . . . . .66
Combining the DNS cache proxy and DNS override features . .67
GSLB DNS type any query . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .68
Transparent DNS query intercept. . . . . . . . . . . . . . . . . . . . . . . . . . . .69
Redirecting queries . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71
Redirecting queries and perform GSLB . . . . . . . . . . . . . . . . . . .73
Responding to queries directly . . . . . . . . . . . . . . . . . . . . . . . . . . 74
Displaying transparent DNS query intercept statistics . . . . . . .75
Enabling DNS request logging . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 76
Distributed health checks for GSLB . . . . . . . . . . . . . . . . . . . . . . 77
Host-level policies for site selection. . . . . . . . . . . . . . . . . . . . . . . . . .84
Global vs host-level policy . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .84
Configuring host-level policies . . . . . . . . . . . . . . . . . . . . . . . . . .84
Displaying host-level policy information . . . . . . . . . . . . . . . . . . .92
Deleting GSLB host-level policies . . . . . . . . . . . . . . . . . . . . . . . .95
Configuration example. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .96
Geographic region for a prefix . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 97
How geographic location is determined . . . . . . . . . . . . . . . . . . . 97
Configuring a geographic prefix . . . . . . . . . . . . . . . . . . . . . . . . .98
Displaying the number of geographic prefixes. . . . . . . . . . . . . .99
Displaying information about geographic prefix . . . . . . . . . . . .99
Example configuration. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .100
GSLB optimization. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .101
Optimized VIP list processing . . . . . . . . . . . . . . . . . . . . . . . . . .101
Increased VIP support per site and reduced CPU usage on GSLB
controller. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .102
Configuration example. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .103
Guidelines and recommendations for using this feature . . . .104