If you require only a subset of information, set filters in the XPath expressions to limit the updates. To filter the data of a specific access point (AP), use a key after the node. For example, to receive data for an AP with hostname ‘my_hostname’, use the subscription XPath: access-point[hostname=’my_hostname’] . Note that the data updates will contain data objects from all the leaves, and not just from the limited subset that is defined. Scale Information The following tables show the minimum recommended intervals for each of the gathering points under three different scale scenarios. Scenario1: Full Scale with four SSIDs Table 9: Setup Table 10: Recommended Intervals Scenario2:
Full Scale with six SSIDs Model-Driven Telemetry XPath Expressions Supported on Cisco Catalyst 9800 Wireless Controllers APs 2,000 Clients 30,000 SSIDs per AP 4 BSSIDs per AP 8 Physical neighbors per AP 12 Neighbors per AP 96 Gathering Point Records Recommended Interval (Seconds) One Collector Recommended Interval (Seconds) Two Collectors Joined 2000 30 60 AAA 2000 30 60 Radio 4000 30 60 Client RF 30,000 30 60 Client CNTR 30,000 30 60 Client CONN 30,000 60 120 BSSID 16,000 90 180 Neighbor 192,000 180 360 Model-Driven Telemetry 36