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You must specify a connection limit to enable the Connection Load metric. You can specify a value from 1 to as high a value as you need. There is no default. However, the actual value of the Connection Load limit, and other connection load parameters, will be obtained from the global GSLB policy.
Other connection load parameters include the following:
•Sampling intervals and sample rate
•Interval weights
NOTE
If the Connection Load limit is not configured in a
Removing IP addresses that fail a health check from DNS replies
You can configure the ServerIron ADX to remove IP addresses from DNS replies, for those hosts to which the
A site must pass all applicable health checks (Layer 4 and Layer 7) to avoid being removed.
NOTE
If all the sites fail their health checks, resulting in all the sites being rejected by the GSLB ServerIron ADX, the ServerIron ADX sends the DNS reply unchanged to the client.
To configure the ServerIron ADX to remove IP addresses from DNS replies when those addresses fail a health check, enter commands such as the following:
ServerIronADX(config)# gslb
Syntax: [no] dns active-only
Use the no form of the command to disable this DNS parameter.
Removing all IP addresses except the best address
By default, the GSLB ServerIron ADX retains the same number of IP addresses in the DNS replies from the DNS server. The GSLB policy swaps the IP address on the top of the list with the “best” address, selected by the GSLB policy.
You can configure the ServerIron ADX to remove all addresses except the one the
ServerIronADX(config)# gslb
Syntax: [no] dns best-only
Use the no form of the command to disable this DNS parameter.
NOTE
If the GSLB policy does not result in the selection of a “best” address, the DNS reply can still contain multiple addresses.
ServerIron ADX Global Server Load Balancing Guide | 119 |
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