Traffic Management filters

This filter sorts or selects answers based on the lowest "cost" metadata value. Use this filter to always select the least expensive answer or use it with the Pulsar Stabilize filter to always select the least expensive option as long as it is within the best-performing option threshold you define. By default, this filter orders all answers from the lowest to the highest cost.

This filter arranges answers based on their priority metadata value. It sorts them from the highest priority (i.e., a value of "1" is the highest priority) to the lowest priority. This filter is often used in conjunction with filters like the Up filter to implement DNS failover.

If you enable the "Select answers instead of sorting" option, then only the answer(s) with the highest priority are returned.

This filter eliminates all but the first N (number) answers in the response. Use this filter with others like the Shuffle or Weighted Shuffle filters to implement a round-robin or weighted round-robin approach to the number of responses that you return. By default, this filter will eliminate all by one answer.

This filter selects answers that are only in the same region as the first answer. Use this filter with other filters like Group Sticky Shuffle to group answers by region.

This filter rearranges the list of answers randomly. Use this filter with others like the Select First N filter to return a subset of the available answers at random.

This filter arranges answers uniquely based on the requester's IP address. The order of answers in the response remains the same for the same requesting client. Use this filter with the Select First N filter to return only the first N (number) of answers to the same client (as opposed to returning the entire list).

If you enable the "Apply stickiness by subnet (not by individual IP)" option, then requests in the same IPv4 or IPv6 subnet receive the same output. Enable this option to ensure users balanced across multiple recursors get the same answer.

This filter arranges answers uniquely based on the requester IP address, and then groups all answers together by region. Use this filter with the Select First N filter to always return the same answers from the same region to the same client.

This filter does not do any geo-targeting or global server load balancing. It sorts regions randomly but consistently for each user. Answers with no defined region are considered to be in the same (empty) region.

If you enable the "Apply stickiness by subnet (not by individual IP)" option, then requests coming from the same IPv4 or IPv6 subnet receive the same output. Enable this option to ensure that users balanced across multiple recursors get the same answer.

This filter rearranges answers randomly based on the "weight" metadata value. Answers with a higher weight value are returned first more often. Use this filter with the Select First N filter to return one or more answers with probability proportional to their weights.

This filter combines the behavior of the Sticky Shuffle and Weighted Shuffle filters to randomly shuffle answers based on the weight metadata field consistently across the same source IP address.

If you select "Apply stickiness by subnet (not by individual IP), then requests in the same IPv4 or IPv6 subnet receive the same output. Select this option to ensure that users balanced across multiple recursors get the same answer.