1Smokeping_probes_TraceroutePing(3) SmokePingSmokeping_probes_TraceroutePing(3)
2
6 Smokeping::probes::TraceroutePing - use traceroute to obtain RTT for a
7 router
8
10 *** Probes ***
11 +TraceroutePing
13 binary = /usr/bin/traceroute # mandatory
15 binaryv6 = /usr/bin/traceroute6
16 forks = 5
17 offset = 50%
18 step = 300
19 timeout = 15
20 # The following variables can be overridden in each target section
22 /^influx_.+/ = influx_location = In the basement
23 desthost = www.example.com # mandatory
24 host = www-net-router.example.com # mandatory
25 maxttl = 15
26 minttl = 11
27 pings = 5
28 wait = 3
29 # [...]
31 *** Targets ***
33 probe = TraceroutePing # if this should be the default probe
35 # [...]
37 + mytarget
39 # probe = TraceroutePing # if the default probe is something else
40 host = my.host
41 /^influx_.+/ = influx_location = In the basement
42 desthost = www.example.com # mandatory
43 host = www-net-router.example.com # mandatory
44 maxttl = 15
45 minttl = 11
46 pings = 5
47 wait = 3
48
50 Integrates standard traceroute as a probe into smokeping. The use case
51 for this probe is gateways that do not respond to TCP/UDP/ICMP packets
52 addressed to them, but do return ICMP TTL_EXCEEDED packets for
53 traceroute packets to a host they route to. It is best used in
54 situations where routing for the path is static or nearly so;
55 attempting to use this on networks with changing routing will yield
56 poor results. The best place to use this probe is on first- and last-
57 mile links, which are more likely to have static routing and also more
58 likely to have firewalls that ignore ICMP ECHO_REQUEST.
59 The mandatory probe variable binary must have an executable path for
61 traceroute.
62 The optional probe variable binaryv6 sets an executable path for your
64 IPv6 traceroute. If this is set to the same value as binary,
65 TraceroutePing will use the -6 flag when running traceroute for IPv6
66 addresses. If this variable is not set, TraceroutePing will try to
67 find an functioning IPv6 traceroute. It will first try appending "6"
68 to the path in binary, then try including the "-6" flag in a test
69 command. Note that Linux appears to have a wide variety of IPv6
70 traceroute implementations. My Ubuntu 14.04 machine has
71 /usr/sbin/traceroute6 from iputils, but /usr/bin/traceroute (from
72 Dmitry Butskoy) accepts the -6 flag and is actually a better
73 implementation. You may need to let TraceroutePing autodetect this, or
74 experiment to find the best traceroute.
75 The mandatory target variable desthost must name a destination host for
77 the probe. The destination host itself is not of interest and no data
78 is gathered on it, its only purpose is to route traffic past your
79 actual target. Selection of a destination just past your target, with
80 static or strongly preferred routing through your target, will get
81 better data.
82 The mandatory target variable host must name the target host for the
84 probe. This is the router that you want to collect RTT data for. This
85 variable must either be the valid reverse-lookup name of the router, or
86 its IP address. Using the IP address is preferable since it allows us
87 to tell traceroute to avoid DNS lookups.
88 The target variables minttl and maxttl can be used to describe the
90 range of expected hop counts to host. On longer paths or paths through
91 unresponsive gateways or ending in unresponsive hosts, this reduces the
92 amount of time this probe takes to execute. These default to 1 and 30.
93 The target variables wait sets the traceroute probe timeout in seconds.
95 This defaults to 1, instead of the traditionally higher value used by
96 LBL traceroute. Traceroute programs often enforce a lower bound on
97 this value.
98
100 Supported probe-specific variables:
101 binary
103 The location of your traceroute binary.
104 Example value: /usr/bin/traceroute
106 This setting is mandatory.
108 binaryv6
110 The location of your IPv6 traceroute binary.
111 Example value: /usr/bin/traceroute6
113 forks
115 Run this many concurrent processes at maximum
116 Example value: 5
118 Default value: 5
120 offset
122 If you run many probes concurrently you may want to prevent them
123 from hitting your network all at the same time. Using the probe-
124 specific offset parameter you can change the point in time when
125 each probe will be run. Offset is specified in % of total interval,
126 or alternatively as 'random', and the offset from the 'General'
127 section is used if nothing is specified here. Note that this does
128 NOT influence the rrds itself, it is just a matter of when data
129 acquisition is initiated. (This variable is only applicable if the
130 variable 'concurrentprobes' is set in the 'General' section.)
131 Example value: 50%
133 step
135 Duration of the base interval that this probe should use, if
136 different from the one specified in the 'Database' section. Note
137 that the step in the RRD files is fixed when they are originally
138 generated, and if you change the step parameter afterwards, you'll
139 have to delete the old RRD files or somehow convert them. (This
140 variable is only applicable if the variable 'concurrentprobes' is
141 set in the 'General' section.)
142 Example value: 300
144 timeout
146 How long a single 'ping' takes at maximum
147 Example value: 15
149 Default value: 5
151 Supported target-specific variables:
153 /^influx_.+/
155 This is a tag that will be sent to influxdb and has no impact on
156 the probe measurement. The tag name will be sent without the
157 "influx_" prefix, which will be replaced with "tag_" instead. Tags
158 can be used for filtering.
159 Example value: influx_location = In the basement
161 desthost
163 Final destination host for traceroute packets. Does not have to be
164 reachable unless it is also your host.
165 Example value: www.example.com
167 This setting is mandatory.
169 host
171 Host of interest to monitor. Must be either the host's reverse-
172 lookup name, or an IP address.
173 Example value: www-net-router.example.com
175 This setting is mandatory.
177 maxttl
179 Maximum TTL. Set to the maximum expected number of hops to host.
180 Example value: 15
182 minttl
184 Minimum TTL. Set to the minimum expected number of hops to host.
185 Example value: 11
187 pings
189 How many pings should be sent to each target, if different from the
190 global value specified in the Database section. Note that the
191 number of pings in the RRD files is fixed when they are originally
192 generated, and if you change this parameter afterwards, you'll have
193 to delete the old RRD files or somehow convert them.
194 Example value: 5
196 wait
198 Waittime. The timeout value for traceroute's probes, in seconds.
199 Example value: 3
201
203 John Hood <cgull@glup.org>,
204
206 smokeping_extend
2072.8.2 2022-01-22Smokeping_probes_TraceroutePing(3)