flow-stat — Generate reports with flow data.
flow-stat [-hnpPw] [-d debug_level] [-f format] [-S sort_field] [-s
sort_field] [-t tally_lines] [-T title]
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.
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.
Sort ascending on field sort_field.
Sort descending on field sort_field.
Tally totals every tally_lineslines.
-T title Set report title to title.
-w Wide output.
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
flow-cat -p /flows/krc4 | flow-stat -f10 -P -p -S4
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
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
Provide a top source/destination AS report. Use symbolic names.
flow-cat -p /flows/krc4 | flow-stat -f20 -n -P -p -S4
Mark Fullmer email@example.com