2 | Advanced GSLB configuration for IPv6 |
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| TABLE 17 | Advanced GSLB for IPv6 configuration tasks |
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| Configuring | page 225 | |
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| Configuring weighted | page 226 | |
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| DNS response parameters |
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| Configuring an | page 229 | |
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| Configuring an | page 230 | |
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Configuring GSLB policy metrics for IPv6
The GSLB ServerIron ADX supports global server load balancing of IPv6 addresses in cache proxy with DNS override mode. In this mode, The GSLB ServerIron ADX evaluates each IP address in the IP list based on the configured policy metrics and places the best IP address on the top of the IP list in the response.
Table 18 lists the GSLB policy metrics used to load balance IPv6 addresses. The metrics are listed in their default order. If the GSLB controller is unable select the best IP address based on a metric, the candidate IP addresses are passed on to the next step in the GSLB algorithm, where the process of selecting the best IP address continues.
TABLE 18 GSLB policy metrics for IPv6
Metric | Default | Configuration options |
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Server (host) health | Enabled. | You can disable this metric. |
| The GSLB ServerIron ADX performs | NOTE: When both the health check |
| Layer 4 health checks on the TCP or | metric and the FlashBack |
| UDP port and Layer 7 health checks | metric are is disabled, the |
| on the application, if the application | ServerIron ADX does not |
| is known to the ServerIron ADX. | perform any Layer 4 or Layer |
| NOTE: If all the sites fail their health | 7 health checks. |
| checks, resulting in all the | Refer to “Server (host) health |
| sites being rejected by the | metric” on page 208. |
| GSLB ServerIron ADX, the |
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| ServerIron ADX sends the |
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| DNS reply unchanged to the |
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Weighted IP address | Disabled. |
| When enabled, the ServerIron ADX |
| distributes GSLB traffic among IP |
| addresses in the IP list based on |
| weights assigned to the IP |
| addresses. |
You can disable this metric. You can enable this metric and assign weights to individual IP addresses. The weight can be a value from 0 to 100. The default value is 0.
Refer to “Weighted IP metric” on page 209.
204 | ServerIron ADX Global Server Load Balancing Guide |
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