System information

Manual:System/GPS
67
References
[1] http:/ / www8. garmin. com/ support/ text_out. html
[2] http:/ / en. wikipedia. org/ wiki/ Pulse_per_second
Manual:IP/Traffic Flow
Applies to RouterOS: 2.9, v3, v4 +
Summary
Sub-menu: /ip traffic-flow
MikroTik Traffic-Flow is a system that provides statistic information about packets which pass through the router.
Besides network monitoring and accounting, system administrators can identify various problems that may occur in
the network. With help of Traffic-Flow, it is possible to analyze and optimize the overall network performance. As
Traffic-Flow is compatible with Cisco NetFlow, it can be used with various utilities which are designed for Cisco's
NetFlow.
Traffic-Flow supports the following NetFlow formats:
• version 1 - the first version of NetFlow data format, do not use it, unless you have to
• version 5 - in addition to version 1, version 5 has possibility to inlude BGP AS and flow sequence number
information. Currently RouterOS does not include BGP AS numbers.
• version 9 - a new format which can be extended with new fields and record types thank's to its template-style
design
General
Sub-menu: /ip traffic-flow
This section lists the configuration properties of Traffic-Flow.
Property Description
interfaces (string | all; Default: all) Names of those interfaces which will be used to gather statistics for traffic-flow. To specify more than
one interface, separate them with a comma.
cache-entries (128k | 16k | 1k | 256k |
2k | ... ; Default: 4k)
Number of flows which can be in router's memory simultaneously.
active-flow-timeout (time; Default:
30m)
Maximum life-time of a flow.
inactive-flow-timeout (time;
Default: 15s)
How long to keep the flow active, if it is idle. If connection does not see any packet within this
timeout, then traffic-flow will send packet out as new flow. If this timeout is too small it can create
significant amount of flows and overflow the buffer.