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 desthost = www.example.com # mandatory
23 host = www-net-router.example.com # mandatory
24 maxttl = 15
25 minttl = 11
26 pings = 5
27 wait = 3
28 # [...]
30 *** Targets ***
32 probe = TraceroutePing # if this should be the default probe
34 # [...]
36 + mytarget
38 # probe = TraceroutePing # if the default probe is something else
39 host = my.host
40 desthost = www.example.com # mandatory
41 host = www-net-router.example.com # mandatory
42 maxttl = 15
43 minttl = 11
44 pings = 5
45 wait = 3
46
48 Integrates standard traceroute as a probe into smokeping. The use case
49 for this probe is gateways that do not respond to TCP/UDP/ICMP packets
50 addressed to them, but do return ICMP TTL_EXCEEDED packets for
51 traceroute packets to a host they route to. It is best used in
52 situations where routing for the path is static or nearly so;
53 attempting to use this on networks with changing routing will yield
54 poor results. The best place to use this probe is on first- and last-
55 mile links, which are more likely to have static routing and also more
56 likely to have firewalls that ignore ICMP ECHO_REQUEST.
57 The mandatory probe variable binary must have an executable path for
59 traceroute.
60 The optional probe variable binaryv6 sets an executable path for your
62 IPv6 traceroute. If this is set to the same value as binary,
63 TraceroutePing will use the -6 flag when running traceroute for IPv6
64 addresses. If this variable is not set, TraceroutePing will try to
65 find an functioning IPv6 traceroute. It will first try appending "6"
66 to the path in binary, then try including the "-6" flag in a test
67 command. Note that Linux appears to have a wide variety of IPv6
68 traceroute implementations. My Ubuntu 14.04 machine has
69 /usr/sbin/traceroute6 from iputils, but /usr/bin/traceroute (from
70 Dmitry Butskoy) accepts the -6 flag and is actually a better
71 implementation. You may need to let TraceroutePing autodetect this, or
72 experiment to find the best traceroute.
73 The mandatory target variable desthost must name a destination host for
75 the probe. The destination host itself is not of interest and no data
76 is gathered on it, its only purpose is to route traffic past your
77 actual target. Selection of a destination just past your target, with
78 static or strongly preferred routing through your target, will get
79 better data.
80 The mandatory target variable host must name the target host for the
82 probe. This is the router that you want to collect RTT data for. This
83 variable must either be the valid reverse-lookup name of the router, or
84 its IP address. Using the IP address is preferable since it allows us
85 to tell traceroute to avoid DNS lookups.
86 The target variables minttl and maxttl can be used to describe the
88 range of expected hop counts to host. On longer paths or paths through
89 unresponsive gateways or ending in unresponsive hosts, this reduces the
90 amount of time this probe takes to execute. These default to 1 and 30.
91 The target variables wait sets the traceroute probe timeout in seconds.
93 This defaults to 1, instead of the traditionally higher value used by
94 LBL traceroute. Traceroute programs often enforce a lower bound on
95 this value.
96
98 Supported probe-specific variables:
99 binary
101 The location of your traceroute binary.
102 Example value: /usr/bin/traceroute
104 This setting is mandatory.
106 binaryv6
108 The location of your IPv6 traceroute binary.
109 Example value: /usr/bin/traceroute6
111 forks
113 Run this many concurrent processes at maximum
114 Example value: 5
116 Default value: 5
118 offset
120 If you run many probes concurrently you may want to prevent them
121 from hitting your network all at the same time. Using the probe-
122 specific offset parameter you can change the point in time when
123 each probe will be run. Offset is specified in % of total interval,
124 or alternatively as 'random', and the offset from the 'General'
125 section is used if nothing is specified here. Note that this does
126 NOT influence the rrds itself, it is just a matter of when data
127 acqusition is initiated. (This variable is only applicable if the
128 variable 'concurrentprobes' is set in the 'General' section.)
129 Example value: 50%
131 step
133 Duration of the base interval that this probe should use, if
134 different from the one specified in the 'Database' section. Note
135 that the step in the RRD files is fixed when they are originally
136 generated, and if you change the step parameter afterwards, you'll
137 have to delete the old RRD files or somehow convert them. (This
138 variable is only applicable if the variable 'concurrentprobes' is
139 set in the 'General' section.)
140 Example value: 300
142 timeout
144 How long a single 'ping' takes at maximum
145 Example value: 15
147 Default value: 5
149 Supported target-specific variables:
151 desthost
153 Final destination host for traceroute packets. Does not have to be
154 reachable unless it is also your host.
155 Example value: www.example.com
157 This setting is mandatory.
159 host
161 Host of interest to monitor. Must be either the host's reverse-
162 lookup name, or an IP address.
163 Example value: www-net-router.example.com
165 This setting is mandatory.
167 maxttl
169 Maximum TTL. Set to the maximum expected number of hops to host.
170 Example value: 15
172 minttl
174 Minimum TTL. Set to the minimum expected number of hops to host.
175 Example value: 11
177 pings
179 How many pings should be sent to each target, if different from the
180 global value specified in the Database section. Note that the
181 number of pings in the RRD files is fixed when they are originally
182 generated, and if you change this parameter afterwards, you'll have
183 to delete the old RRD files or somehow convert them.
184 Example value: 5
186 wait
188 Waittime. The timeout value for traceroute's probes, in seconds.
189 Example value: 3
191
193 John Hood <cgull@glup.org>,
194
196 smokeping_extend
1972.7.3 2021-07-23Smokeping_probes_TraceroutePing(3)