All commands applicable for the Cisco NCS 5500 Series Router are also supported on the Cisco NCS 540 Series Router that is introduced from Cisco IOS XR Release 6.3.2. References to earlier releases in Command History tables apply to only the Cisco NCS 5500 Series Router.
Cisco IOS XR software commands
related to the collection of interface statistics (StatsD) for system
monitoring on the router. Interface statistics on the router are found in
hardware (most of the time) and software (exception packets). The counters are
always local (relative to the CPU) to the node on which the interface is homed.
Cisco IOS XR software provides
an efficient mechanism to collect these counters from various
application-specific integrated circuits (ASICs) or NetIO and assemble an
accurate set of statistics for an interface. After the statistics are produced,
they can be exported to interested parties (command-line interface [CLI],
Simple Network Management Protocol [SNMP], and so forth).
Cisco IOS XR software statistics
collection system provides a common framework to be used by all interface
owners to export the statistics for interfaces they own. The system also
defines a common set of statistics that are relevant to all interfaces and
thereby provides a consistent and constant set of counters that are always
associated and maintained with any interface on the router.
collection system includes the statistics manager, the statistics server, one
or more statistics collectors, and the necessary libraries. Each node on a
router houses one statistics server.
In addition to the
statistics server, each node (that has interfaces) has one or more statistics
collectors. Statistics collectors are platform specific and can obtain various
hardware and software counters to satisfy requests from the statistics server.
manager does not attempt to produce statistics for interfaces for which no
statistics collector has registered. Requests for statistics on interfaces for
which no statistics collector has registered results in an error returned to
the requestor by the statistics manager.