nfreplay1

Usage

Overview

nfreplay reads binary flow files stored by any nfdump collector and sents the flow records to a remote host or a multicast group.

nfreplay sends the data as netflow v5 or v9 to the remote location.

nfreplay accepts a filter to limit the flows to be sent. The filter syntax is equivalent to nfdump.

The options are as follows:

-r flowfile

Read input data from flowfile.

-H remotehost

Send all flows to this remote host. Accepts a symbolic name or a IPv4/IPv6 IP address.

-j mcastgroup

Join this multicast group and send all flows to this group host. Accepts a symbolic name or multicast IPv4/IPv6 IP address.

-p port

Send all flows to this port on the remote side. Default is 9995.

-S Sourceaddr

Use the specified source IP address to send the flows

-4

Forces nfreplay to send flows to a IPv4 address only. Can be used if the remote host has an IPv4 and IPv6 address record.

-6

Forces nfreplay to send flows to a IPv6 address only. Can be used if the remote host has an IPv4 and IPv6 address record.

-v version

Send flows as netflow version version. Version V5 and v9 are supported. In v5 mode, all additional elements to a stadard v5 record are skipped and 64bit counters are truncated to 32bit. The default is v9.

-u usec

Delay each record by usec mirco seconds, to avoid overrun on the remote host. Default is 10usec.

-B buffsize

Set send buffer to buffsize size in bytes. Useful to buffer larger data transfers.

-z num

Flows are sent with their "real distribution" acrross time (with a speed coefficient)

-z 1 : 5 minutes of records will be sent in 5 minutes. - z 20 : 5 minutes of record will be sent in 5/20 = 0.25 minutes.

-c num

Limit number of records to send to the first num flows.

-V

Print nfreplay version and exit.

-h

Print help text on stdout with all options and exit.

Return values

255 Initialization failed.

254 Error in filter syntax.

250 Internal error.

nfreplay returns