Brocade Communications Systems 12.4.00 manual

DNSSEC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .112 Verification with DIG . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .114 DNSSEC GSLB in DNS proxy mode . . . . . . . . . . . . . . . . . . . . . .114 Configuring DNSSEC for GSLB . . . . . . . . . . . . . . . . . . . . . . . . .115 Displaying DNSSEC configuration. . . . . . . . . . . . . . . . . . . . . . .116 Displaying DNSSEC statistics . . . . . . . . . . . . . . . . . . . . . . . . . .116

Host-level policies for site selection. . . . . . . . . . . . . . . . . . . . . . . . . 117 Global vs host-level policy . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 117 Configuring host-level policies . . . . . . . . . . . . . . . . . . . . . . . . . 117 Displaying host-level policy information . . . . . . . . . . . . . . . . . .125 Deleting GSLB host-level policies . . . . . . . . . . . . . . . . . . . . . . .128 Configuration example. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .128

Geographic region for a prefix . . . . . . . . . . . . . . . . . . . . . . . . . . . . .129 How geographic location is determined . . . . . . . . . . . . . . . . . .129 Configuring a geographic prefix . . . . . . . . . . . . . . . . . . . . . . . .130 Displaying the number of geographic prefixes. . . . . . . . . . . . .131 Displaying information about geographic prefix . . . . . . . . . . .131 Example configuration. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .132

Smoothing mechanism for RTT measurements . . . . . . . . . . . . . . .133 Configuring enhanced RTT smoothing . . . . . . . . . . . . . . . . . . .134 Determining if the new RTT smoothing mechanism is enabled141

Round-trip times . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 141 Passive RTT gathering . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 141 Active RTT gathering . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .142 Support for both active and passive RTT . . . . . . . . . . . . . . . . .143 Active RTT gathering issues and trade-offs . . . . . . . . . . . . . . .144 Enabling active RTT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .144 Discarding passive RTT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .145 Disabling passive RTT gathering . . . . . . . . . . . . . . . . . . . . . . . .145 Configuring active RTT parameters. . . . . . . . . . . . . . . . . . . . . .146 Probes for RTT gathering . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .149 Active RTT gathering and high availability support . . . . . . . . .151 Displaying RTT information . . . . . . . . . . . . . . . . . . . . . . . . . . . .152

GSLB affinity for high availability . . . . . . . . . . . . . . . . . . . . . . . . . . .157 Configuring an HA group . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .157 Enabling dynamic detection . . . . . . . . . . . . . . . . . . . . . . . . . . .158 Displaying HA information . . . . . . . . . . . . . . . . . . . . . . . . . . . . .159

GSLB optimization. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .162 Optimized VIP list processing . . . . . . . . . . . . . . . . . . . . . . . . . .162 Increased VIP support per site and reduced CPU usage on GSLB controller. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .162 Configuration example. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .164 Guidelines and recommendations for using this feature . . . .165

ServerIron ADX Global Server Load Balancing Guide	v
53-1002437-01