Provided by: argus-client_3.0.8.2-5ubuntu1_amd64 
NAME
rapath - print traceroute path information from argus(8) data.
SYNOPSIS
rapath [-A] [-M [ aspath [dist] | asnode ] ] [-m fields ] [raoptions] [-- filter-
expression]
DESCRIPTION
Rapath reads argus data from an argus-data source, and generates the path information that
can be formulated from flows that experience ICMP responses. When a packet cause the
creation of an ICMP response, for whatever reason, the intermediate node that generates
the ICMP packet is, by definition, on the path. Argus data perserves this intermediate
node address, and rapath uses this information to generate path information, for arbitrary
IP network traffic. Rapath is principally designed to recover traceroute.1 traffic, so
that if a trace is done in the network, argus will pick it up and record the intermediate
nodes and the RTT for the volleys. However the method is generalized such that it also
picks up routing loop conditions, when they exist in the observed packet stream.
Rapath will generate argus flow records that have the src address, dst address and src ttl
of the transmitted packet, aggregated so that the average duration, standard deviation,
max and min rtt's are preserved. The most accurate estimate of the actual Round-Trip Time
(RTT) between a src IP address and an ICMP based intermediate node is the MinDur field. As
the number of samples gets larger, the MinDur field approaches the theoretical best case
minimum RTT. RTT's above this value, will include variations in network and device delay.
When using the optional racluster.1 style flow descriptors, path information to and from
CIDR based network addresses can be calculated, so that traces from and to multiple
machines in the subnets can be grouped together.
The output of rapath can be piped into ranonymize.1, in order to share path performance
information without divulging the actual addresses of intermidate routers.
RAPATH SPECIFIC OPTIONS
Rapath, like all ra based clients, supports a number of ra options including filtering of
input argus records through a terminating filter expression. See ra(1) for a complete
description of ra options. rapath(1) specific options are:
-A Draw a description of the path with a legend.
-M pathmodes
Supported pathmodes are:
node - print a series of nodes that represent the path (default).
addr - print the IP addresses, instead of node labels.
aspath [dist] - print the series of origin AS's along the path. Optional 'dist' adds the ttl range.
asnode - print the series of nodes, preceded with their AS's along the path.
-m fields
Specify modifications to the default flow identifiers. Supported fields are:
srcid - the observation domain source identifier.
saddr[/len] - the source address, optionally as a CIDR address.
daddr[/len] - the destination address, optionally as a CIDR address.
INVOCATION
A sample invocation of rapath(1). This call reads argus(8) data from inputfile and
generates any path information, based on src and dst IP addresses, and writes the results
to stdout.
% rapath -r inputfile
SrcId SrcAddr Dir DstAddr Inode sTtl Mean StdDev Max Min Trans
192.168.0.68 192.168.0.68 -> 128.2.42.10 192.168.0.1 1 0.000686 0.000037 0.000764 0.000627 18
192.168.0.68 192.168.0.68 -> 128.2.42.10 10.22.96.1 2 0.009329 0.002719 0.019935 0.007435 18
192.168.0.68 192.168.0.68 -> 128.2.42.10 208.59.246.2 3 0.010686 0.002619 0.020175 0.007698 18
192.168.0.68 192.168.0.68 -> 128.2.42.10 207.172.15.85 4 0.013988 0.007116 0.032652 0.008923 11
192.168.0.68 192.168.0.68 -> 128.2.42.10 207.172.15.67 4 0.010188 0.000218 0.010676 0.009932 7
192.168.0.68 192.168.0.68 -> 128.2.42.10 198.32.118.161 5 0.010865 0.003557 0.019436 0.007937 18
192.168.0.68 192.168.0.68 -> 128.2.42.10 64.57.20.251 6 0.044649 0.008916 0.076137 0.039844 18
192.168.0.68 192.168.0.68 -> 128.2.42.10 64.57.21.146 7 0.056345 0.003985 0.065643 0.053371 18
192.168.0.68 192.168.0.68 -> 128.2.42.10 147.73.16.120 8 0.052594 0.003037 0.061770 0.050151 18
192.168.0.68 192.168.0.68 -> 128.2.42.10 128.2.255.249 9 0.055147 0.002541 0.064620 0.053151 18
192.168.0.68 192.168.0.68 -> 128.2.42.10 128.2.255.212 10 0.051835 0.000326 0.052362 0.051392 9
192.168.0.68 192.168.0.68 -> 128.2.42.10 128.2.255.205 10 0.054236 0.000658 0.055198 0.053028 9
The output of rapath is an argus data stream, and can be written to a file, or piped to
other programs for processing. The resulting stream is a clustered data stream ordered by
the unique " saddr -> daddr " paths.
The next sample invocation of rapath(1) prints out a graph of the path information using
letters as index, with the node information provided as reference.
% rapath -Ar inputfile
192.168.0.68(192.168.0.68::128.2.42.10) A -> B -> C -> {D,E} -> F -> G -> H -> I -> J -> {K,L}
Node SrcId SrcAddr Dir DstAddr Inode sTtl Mean StdDev Max Min Trans
A 192.168.0.68 192.168.0.68 -> 128.2.42.10 192.168.0.1 1 0.000686 0.000037 0.000764 0.000627 18
B 192.168.0.68 192.168.0.68 -> 128.2.42.10 10.22.96.1 2 0.009329 0.002719 0.019935 0.007435 18
C 192.168.0.68 192.168.0.68 -> 128.2.42.10 208.59.246.2 3 0.010686 0.002619 0.020175 0.007698 18
D 192.168.0.68 192.168.0.68 -> 128.2.42.10 207.172.15.85 4 0.013988 0.007116 0.032652 0.008923 11
E 192.168.0.68 192.168.0.68 -> 128.2.42.10 207.172.15.67 4 0.010188 0.000218 0.010676 0.009932 7
F 192.168.0.68 192.168.0.68 -> 128.2.42.10 198.32.118.161 5 0.010865 0.003557 0.019436 0.007937 18
G 192.168.0.68 192.168.0.68 -> 128.2.42.10 64.57.20.251 6 0.044649 0.008916 0.076137 0.039844 18
H 192.168.0.68 192.168.0.68 -> 128.2.42.10 64.57.21.146 7 0.056345 0.003985 0.065643 0.053371 18
I 192.168.0.68 192.168.0.68 -> 128.2.42.10 147.73.16.120 8 0.052594 0.003037 0.061770 0.050151 18
J 192.168.0.68 192.168.0.68 -> 128.2.42.10 128.2.255.249 9 0.055147 0.002541 0.064620 0.053151 18
K 192.168.0.68 192.168.0.68 -> 128.2.42.10 128.2.255.212 10 0.051835 0.000326 0.052362 0.051392 9
L 192.168.0.68 192.168.0.68 -> 128.2.42.10 128.2.255.205 10 0.054236 0.000658 0.055198 0.053028 9
the path. Because network paths can be divergent, due to routing changes, load balancing,
or redirects, multiple nodes can be observed at the same distance along the path.
rapath(1) uses '{' and '}' to delimit the set of nodes that are observed at the same
distance in the path. Letters in the path are references to inode addresses contained in
the actual node records.
The next sample invocation of rapath(1) prints out just a graph of the path information in
two sets of argus data; today's and last month, to highlight how paths change. ASN
information is added to the records, to show how rapath(1) depicts ASN relationships,
using a -f ralabel.conf(5) option.
The -q option suppresses the default output of the actual argus record data compiled for
each node along the path. The '[' and ']' (brackets) deliniate AS's and will contain the
set of nodes that were observed within the same AS.
% rapath -f ralabel.conf -qA -r inputfile
192.168.0.68(192.168.0.68::128.2.42.10) A -> [B] -> [C -> {D,E}] -> [F] -> [G -> H] -> [I] -> [J -> {K,L}]
% rapath -f ralabel.conf -qA -r inputfile.last.month
192.168.0.68(192.168.0.68::128.2.42.10) A -> [B] -> [C -> D] -> [E -> F -> G -> {H,I,J,K} -> {L,M,N} -> O -> P] -> [Q -> {R,S}]
This next sample invocation of rapath(1) prints out a graph of the ASpath, the set of AS's
that the network path traversed. The -q option, again is used to suppress the output of
the actual node information. Where there is no AS number, possibly due to a private
network or an unregistered address space, letters are used to denote the node.
% rapath -f ralabel.conf -r inputfile -qA -M aspath
192.168.0.68(192.168.0.68::128.2.42.10) A -> AS30496 -> AS6079 -> AS1257 -> AS11164 -> AS5050 -> AS9
This sample invocation of rapath(1) prints out a graph of the ASpath, suppressing the
output of the actual node information (-q), and printing actual IP addresses, rather than
node labels.
% rapath -f ralabel.conf -r inputfile -qA -M aspath addr
192.168.0.68(192.168.0.68::128.2.42.10) 192.168.0.1 -> AS30496 -> AS6079 -> AS1257 -> AS11164 -> AS5050 -> AS9
This sample invocation of rapath(1) prints out a graph of the ASpath, with distance
information, suppressing the output of the actual node information (-q). This is the
aspath output, but with distances in TTL's for each entry specified.
% rapath -f ralabel.conf -r inputfile -qA -M aspath dist addr
192.168.0.68(192.168.0.68::128.2.42.10) 192.168.0.1:1 -> AS30496:2 -> AS6079:3-4 -> AS1257:5 -> AS11164:6-7 -> AS5050:8 -> AS9:9-10
This sample invocation of rapath(1) prints out a graph of the AS nodal path, suppressing
the output of the actual node information (-q).
% rapath -f ralabel.conf -r inputfile -qA -M asnode
192.168.0.68(192.168.0.68::128.2.42.10) AS30496:[A -> B] -> AS6079:[C -> {D,E}] -> AS1257:[F] -> AS11164:[G -> H] -> AS5050:[I] -> AS9:[J -> {K,L}]
% rapath -f ralabel.conf -r inputfile.last.month -qA -M asnode
192.168.0.68(192.168.0.68::128.2.42.10) A -> AS30496:[B] -> AS6079:[C -> D] -> AS3356:[E -> F -> G -> {H,I,J,K} -> {L,M,N} -> O -> P] -> AS9:[Q -> {R,S}]
This sample invocation of rapath(1) demonstrates how to use CIDR address aggregation,
using the -m option, to generate path performance data from a class B subnet, to a class C
subnet.
% rapath -f ralabel.conf -r inputfile -A -m saddr/16 daddr/24 - srcid 192.168.0.68
192.168.0.68(192.168.0.0/16::128.2.42.0/24) A -> [B] -> [C -> {D,E}] -> [F] -> [G -> H] -> [I] -> [J -> {K,L}]
Node SrcId SrcAddr Dir DstAddr Inode sTtl Mean StdDev Max Min Trans
A 192.168.0.68 192.168.0.0/16 -> 128.2.42.0/24 192.168.0.1 1 0.000686 0.000037 0.000764 0.000627 18
B 192.168.0.68 192.168.0.0/16 -> 128.2.42.0/24 10.22.96.1 2 0.009329 0.002719 0.019935 0.007435 18
C 192.168.0.68 192.168.0.0/16 -> 128.2.42.0/24 208.59.246.2 3 0.010686 0.002619 0.020175 0.007698 18
D 192.168.0.68 192.168.0.0/16 -> 128.2.42.0/24 207.172.15.85 4 0.013988 0.007116 0.032652 0.008923 11
E 192.168.0.68 192.168.0.0/16 -> 128.2.42.0/24 207.172.15.67 4 0.010188 0.000218 0.010676 0.009932 7
F 192.168.0.68 192.168.0.0/16 -> 128.2.42.0/24 198.32.118.161 5 0.010865 0.003557 0.019436 0.007937 18
G 192.168.0.68 192.168.0.0/16 -> 128.2.42.0/24 64.57.20.251 6 0.044649 0.008916 0.076137 0.039844 18
H 192.168.0.68 192.168.0.0/16 -> 128.2.42.0/24 64.57.21.146 7 0.056345 0.003985 0.065643 0.053371 18
I 192.168.0.68 192.168.0.0/16 -> 128.2.42.0/24 147.73.16.120 8 0.052594 0.003037 0.061770 0.050151 18
J 192.168.0.68 192.168.0.0/16 -> 128.2.42.0/24 128.2.255.249 9 0.055147 0.002541 0.064620 0.053151 18
K 192.168.0.68 192.168.0.0/16 -> 128.2.42.0/24 128.2.255.212 10 0.051835 0.000326 0.052362 0.051392 9
L 192.168.0.68 192.168.0.0/16 -> 128.2.42.0/24 128.2.255.205 10 0.054236 0.000658 0.055198 0.053028 9
COPYRIGHT
Copyright (c) 2000-2016 QoSient. All rights reserved.
SEE ALSO
ra(1), rarc(5), ralabel.conf(5), argus(8),
FILES
AUTHORS
Carter Bullard (carter@qosient.com).