NETFLOW-MIB: View SNMP OID List / Download MIB

The Netflow MIB provides a simple and easy method to get NetFlow cache information, current NetFlow configuration and statistics. It will enable medium to small size enterprises to take advantage of NetFlow technology over SNMP at a reduced infrastructure cost. The MIB is created to provide Netflow information in these areas: 1. Cache information and configuration. 2. Collector information and configuration. 3. Export Statistics. 4. Version 9 Export Template information. Terminology used Flow A flow is defined as a unidirectional sequence of packets with some common properties that pass through a network device. These collected flows are exported to an external device, the NetFlow collector. Network flows are highly granular; for example, flow records include details such as IP addresses, packet and byte counts,timestamps, Type of Service (ToS), application ports, input and output interfaces, etc. Exporter A device (for example, a router) with NetFlow services enabled. The exporter monitors packets entering an observation point and creates flows out of these packets. The information from these flows are exported in the form of Flow Records to the collector. Flow Record A Flow Record provides information about an IP Flow that exists on the Exporter. The Flow Records are commonly referred to as NetFlow Services data or NetFlow data. Collector The NetFlow Collector receives Flow Records from one or more Exporters. It processes the received export packet, i.e. parses, stores, display the Flow Record information. The flow records may be optionally aggregated before being stored into the hard disk. Template NetFlow Version 9 Export format is template based. Version 9 record format consists of a packet header followed by at least one or more template or data FlowSets. A template FlowSet (collection of one or more template) provides a description of the fields that will be present in future data FlowSets. Templates provide an extensible design to the record format, a feature that should allow future enhancements to NetFlow services without requiring concurrent changes to the basic flow-record format. One additional record type is also a part of Version 9 specification: an options template. Rather than supplying information about IP flows, options are used to supply information about the NetFlow process configuration or NetFlow process specific data.

This table provides Netflow Enable information per interface.

A conceptual row in the netflowInterfaceEntry.

Indicates whether the netflow feature is enabled for this interface, and if so, in which directions.

A table containing configuration and statistics per cache. Cache may be main cache or an aggregation cache.

A conceptual row in the netflowCacheEntry.

The type of netflow cache. NetFlow aggregation maintains one or more extra flow caches with different combinations of fields that determine which traditional flows are grouped together.

Indicates whether netflow is enabled for this cache type.

The number of entries that can be cached for this cache type. The accepted value could be limited based on the amount of memory available in the system.

Number of currently used flow entries.

Number of currently available flow entries.

The timeout period (in minutes) for removing active flows from the cache.

The timeout period (in seconds) for removing inactive flows from the cache.

A table containing version information about export configuration per cache type.

A conceptual row in the netflowCollectorInfoEntry.

The NetFlow data export version.

Maximum number of entries allowed in the netflowCollectorTable for each cache type. A zero indicates export is not supported in the device. The agent should set this value during initialization, and the value for this object cannot be changed during the system's operation.

A control table to configure the collectors that the netflow packets are exported to. The number of entries that can be configured for the cache type is limited by the value of netflowMaxCollectors.

A conceptual row in the netflowCollectorEntry.

The type of Internet address used by this entry.

The Internet address of the collector. This is the address which the Netflow data is exported to.

The transport port of the collector which the Netflow data is exported to.

This object is used to create or delete an entry in the netflowCollectorTable. * A row may be created using the 'CreateAndGo' or 'CreateAndWait' option. When the row is successfully created, the RowStatus would be set to 'active' by the agent. * A row may be deleted by setting the RowStatus to 'destroy'.

total Number of bytes statistics records which were exported.

total Number of flow statistics records which were exported.

Number of packets (udp datagrams) which were exported.

Number of times a flow record failed to be exported.

indicate that it has option template.

A control table to provide statistics of version 9 Flow and Option templates.

A conceptual row in the netflowTemplateEntry.

Defines the structure and interpretation of fields in a data record and serves as an INDEX in this table. Version 9 has two types of Templates: Flow Templates and Option Templates.

Number of templates added.

Number of active templates.

Number of template ager polls.

A control table providing information about version 9.

A conceptual row in the netflowTemplateExportInfoEntry.

Object to indicate whether version 9 export is configured or not.

Export template time out. Templates are resent after this time.

Export option time out. Options are resent after this time.

Template refresh rate. Templates are resent after this many packets.

Option refresh rate. Options are resent after this many packets.