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ServerIron ADX Global Server Load Balancing Guide 15

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Configuring GSLB

The examples in the procedures in this section are based on the configuration shown in Figure 1 on

page 4.

TABLE 1 Configuration tasks: Global SLB

Feature See page...

DNS proxy parameters

Configure a source IP address. The source IP address is required so that the GSLB ServerIron ADX

can perform the health checks on remote devices.

Add a real-server definition for the DNS server.

Add a VIP for the DNS server and bind the real server and virtual server.

page 17

Site parameters

Enable the GSLB protocol on each remote ServerIron ADX. page 19

Specify the sites and the ServerIron ADXs within the sites. page 19

Zone parameters

Specify the zones and the host names within the zones. page 21

Private Virtual IPs (VIPs) (optional)

Enable a site ServerIron ADX to communicate public VIP addresses to a GSLB ServerIron ADX.

GSLB parameters (optional)

Change the GSLB protocol port number (optional). page 29

Change the GSLB protocol update period (optional). page 30

Modify the GSLB parameters related to DNS responses. page 30

GSLB Policy Metrics

Change the order of GSLB policy metrics page 37

Disable or enable GSLB policy metrics page 38

Clear the DNS selection counters for GSLB metrics

Configure the weighted IP metric

Configure the weighted site metric

Configure the active bindings metric

Modify connection load parameters page 49

Modify Session Table capacity and Threshold Tolerance values page 51

Modify Flashback tolerance values page 52

Modify round-trip time (RTT) values page 53

Affinity (optional)

Configure the ServerIron ADX to always favor a specific site based on client IP address page 85

DNS cache proxy (optional)

Configure the ServerIron ADX to directly respond to DNS queries page 91

Transparent DNS query intercept (optional)

Configure the ServerIron ADX to intercept and redirect DNS queries page 95