flowacct - Flow Accouting module


The flow accounting module flowacct enables you to record flow details.
You use flow details to gather statistics and/or for billing purposes.
Accounting consists of recording flow details in a location you designate
and in a format that you can retrieve at a later stage. IPQoS accounting
relies on the exacct mechanism to store and retrieve flow information.

A flow is defined by the 5-tuple - saddr, sport, daddr, dport and

Typically, the accounting module is the last datapath element in a
sequence of actions. Flow attributes include ToS/DS, user id, project id,
creation time (time the flow was created), last seen (when pkts for the
flow were last seen), action name (instance that recorded the flow
information), nbytes and npackets. Attributes are split into groups
entitled basic and extended. The basic group records only the nbytes,
npackets and action name, while the extended group is a superset of the
basic group and records all attributes. The attributes to be recorded, in
addition to the accounting file that contains flow details, are selected
using acctadm(8). The flowacct module does not provide a mechanism to
retrieve flow information from the accounting file nor to interpret the
retrieved information.


The flowacct module exports the following statistics available through

module: flowacct instance: <action id>
name: Flowacct statistics class <action name>
bytes_in_tbl <bytes in the flow table>
epackets <packets in error>
flows_in_tbl <flow records in the flow table>
nbytes <number of bytes through this instance>
npackets <number of packets>
usedmem <memory, in bytes, used by the flow table>



64-bit module (SPARC only.)


ipqosconf(8), acctadm(8), libexacct3LIB, dlcosmk(4IPP), dscpmk(4IPP),
ipgpc(4IPP), ipqos(4IPP), tokenmt(4IPP), tswtclmt(4IPP)

September 29, 2004 FLOWACCT(4IPP)