NAME

flow-stat — Generate reports with flow data.

SYNOPSIS

flow-stat [-hnpPw] [-d debug_level] [-f format] [-S sort_field] [-s sort_field] [-t tally_lines] [-T title]

DESCRIPTION

The flow-stat utility generates usage reports for flow data sets by IP address, IP address pairs, ports, packets, bytes, interfaces, next hops, autonomous systems, ToS bits, exporters, and tags.

OPTIONS

-d debug_level: Enable debugging.
-f format

Report format.  Choose from the following:


    0  Overall Summary


    1  Average packet size distribution


    2  Packets per flow distribution


    3  Octets per flow distribution


    4  Bandwidth per flow distribution


    5  UDP/TCP destination port


    6  UDP/TCP source port


    7  UDP/TCP port


    8  Destination IP


    9  Source IP


    10 Source/Destination IP


    11 Source or Destination IP


    12 IP protocol


    13 octets for flow duration plot data


    14 packets for flow duration plot data


    15 short summary


    16 IP Next Hop


    17 Input interface


    18 Output interface


    19 Source AS


    20 Destination AS


    21 Source/Destination AS


    22 IP ToS


    23 Input/Output Interface


    24 Source Prefix


    25 Destination Prefix


    26 Source/Destination Prefix


    27 Exporter IP


    28 Engine Id


    29 Engine Type


    30 Source Tag


    31 Destination Tag


    32 Source/Destination Tag

-h: Display help.
-n: Use symbolic names where appropriate.
-p: Display header information.
-P: Report as percent total.
-s sort_field: Sort ascending on field sort_field.
-S sort_field: Sort descending on field sort_field.
-t tally_lines: Tally totals every tally_lineslines.
-T title: Set report title to title.
-w: Wide output.

EXAMPLES

Provide a report on top source/destination IP pairs sorted by octets, report in percent total form for the flows in /flows/krc4. Use the preload option to flow-cat to preserve meta information and display it with flow-stat.

flow-cat -p /flows/krc4 | flow-stat -f10 -P -p -S4

EXAMPLES

Many times a campus network will have a single border router which has one interface pointing to the internal side and many interfaces pointing to other providers. These interfaces each have a unique numerical id known in SNMP terms as an ifIndex. The ifIndex to interface name mappings can be determined by using a tool such as snmpwalk or using show commands in recent versions of IOS with the 'show snmp mib ifmib ifindex' or JunOS 'show interfaces'. Once the ifIndex for each interface is known flow-filter can be combined with flow-stat to provide reports such as inbound vs outbound top src/destination IP addresses.

Provide a top source IP address report by outbound traffic, ie the top senders of traffic on the campus network. Assume the ifIndex of the campus interface is 5.

flow-cat -p /flows/krc4 | flow-filter -i5 | flow-stat -f9 -P -p -S3

EXAMPLES

Provide a top destination IP address report by outbound traffic, ie the top sinks of traffic on the campus network. Assume the ifIndex of the campus interface is 5.

flow-cat -p /flows/krc4 | flow-filter -I5 | flow-stat -f8 -P -p -S3

EXAMPLES

Provide a top source/destination AS report. Use symbolic names.

flow-cat -p /flows/krc4 | flow-stat -f20 -n -P -p -S4

BUGS

None known.

AUTHOR

Mark Fullmer maf@splintered.net