This integer is the sequence number of a route-filter prefix entry, and entries sharing the same prefix and prefix length, as recorded in csPolicyRouteFilterPrefix, are evaluated in ascending sequence-number order under the longest-prefix-match rule. An admin uses distinct sequence numbers to control the order multiple overlapping filter entries for the same prefix are checked. For example, giving a more specific override entry a lower sequence number than a broader catch-all entry for the same prefix ensures the override is evaluated first.