1SNMPTEST(1) Net-SNMP SNMPTEST(1)
2
6 snmptest - communicates with a network entity using SNMP requests
7
9 snmptest [COMMON OPTIONS] AGENT
10
12 snmptest is a flexible SNMP application that can monitor and manage in‐
13 formation on a network entity.
14 After invoking the program, a command line interpreter proceeds to ac‐
16 cept commands. This intepreter enables the user to send different
17 types of SNMP requests to target agents.
18 AGENT identifies a target SNMP agent, which is instrumented to monitor
20 the given objects. At its simplest, the AGENT specification will con‐
21 sist of a hostname or an IPv4 address. In this situation, the command
22 will attempt communication with the agent, using UDP/IPv4 to port 161
23 of the given target host. See snmpcmd(1) for a full list of the possi‐
24 ble formats for AGENT.
25 Once snmptest is invoked, the command line intepreter will prompt with:
27 Variable:
29 At this point you can enter one or more variable names, one per line.
31 A blank line ends the parameter input and will send the request (vari‐
32 ables entered) in a single packet, to the remote entity. Each variable
33 name is given in the format specified in variables(5). For example:
34 snmptest -c public -v 1 zeus
36 Variable: system.sysDescr.0
37 Variable:
38 will return some information about the request and reply packets, as
40 well as the information:
41 requestid 0x5992478A errstat 0x0 errindex 0x0
43 system.sysDescr.0 = STRING: "Unix 4.3BSD"
44 The errstatus value shows the error status code for the call. The pos‐
46 sible values for errstat are in the header file snmp.h. The errindex
47 value identifies the variable that has the given error. Index values
48 are assigned to all the variables entered at the "Variable": prompt.
49 The first value is assigned an index of 1.
50 Upon startup, the program defaults to sending a GET request packet.
52 The type of request can be changed by typing one of the following com‐
53 mands at the "Variable:" prompt:
54 $G - send a GET request
56 $N - send a GETNEXT request
57 $S - send a SET request
58 $B - send a GETBULK request
59 Note: GETBULK is not available in SNMPv1
60 $I - send an Inform request
61 $T - send an SNMPv2 Trap request
62 Other values that can be entered at the "Variable:" prompt are:
64 $D - toggle the dumping of each sent and received packet
66 $QP - toggle a quicker, less verbose output form
67 $Q - Quit the program
68 Request Types:
70 GET Request:
72 When in "GET request" mode ($G or default), the user can enter an OID
74 at the "Variable:" prompt. The user can enter multiple OIDs, one per
75 prompt. The user enters a blank line to send the GET request.
76 GETNEXT Request:
78 The "GETNEXT request" mode ($N) is similar to the "Get request" mode,
80 described above.
81 SET Request:
83 When in the "SET request" mode ($S), more information is requested by
85 the prompt for each variable. The prompt:
86 Type [i|s|x|d|n|o|t|a]:
88 requests the type of the variable be entered. Depending on the type of
89 value you want to set, you can type one of the following:
90 i - integer
92 u - unsigned integer
93 s - octet string in ASCII
94 x - octet string in hex bytes, separated by whitespace
95 d - octet string as decimal bytes, separated by whitespace
96 a - ip address in dotted IP notation
97 o - object identifier
98 n - null
99 t - timeticks
100 At this point a value will be prompted for:
101 Value:
103 If this is an integer value, just type the integer (in decimal). If it
105 is a decimal string, type in white-space separated decimal numbers, one
106 per byte of the string. Again type a blank line at the prompt for the
107 variable name to send the packet.
108 GETBULK Request:
110 The "GETBULK request" mode ($B) is similar to the "Set request" mode.
112 GETBULK, however, is not available in SNMPv1.
113 Inform Request:
115 The "Inform request" mode ($I) is similar to the "Set request" mode.
117 This type of request, however, is not available in SNMPv1. Also, the
118 _agent_ specified on the snmptest command should correspond to the tar‐
119 get snmptrapd agent.
120 SNMPv2 Trap Request:
122 The "SNMPv2 Trap Request" mode ($T) is similar to the "Set request"
124 mode. This type of request, however, is not available in SNMPv1. Also,
125 the _agent_ specified on the snmptest command should correspond to the
126 target snmptrapd agent.
127
129 snmptest takes the common options described in the snmpcmd(1) manual
130 page.
131
133 The following is an example of sending a GET request for two OIDs:
134 % snmptest -v 2c -c public testhost:9999
136 Variable: system.sysDescr.0
138 Variable: system.sysContact.0
139 Variable:
140 Received Get Response from 128.2.56.220
141 requestid 0x7D9FCD63 errstat 0x0 errindex 0x0
142 SNMPv2-MIB::sysDescr.0 = STRING: SunOS testhost 5.9 Generic_112233-02 sun4u
143 SNMPv2-MIB::sysContact.0 = STRING: x1111
144 The following is an example of sending a GETNEXT request:
146 Variable: SNMPv2-MIB::sysORUpTime
148 Variable:
149 Received Get Response from 128.2.56.220
150 requestid 0x7D9FCD64 errstat 0x0 errindex 0x0
151 SNMPv2-MIB::sysORUpTime.1 = Timeticks: (6) 0:00:00.06
152 Variable:
153 The following is an example of sending a SET request:
155 Variable: $S
157 Request type is Set Request
158 Variable: system.sysLocation.0
159 Type [i|u|s|x|d|n|o|t|a]: s
160 Value: building 17
161 Variable:
162 Received Get Response from 128.2.56.220
163 requestid 0x7D9FCD65 errstat 0x0 errindex 0x0
164 SNMPv2-MIB::sysLocation.0 = STRING: building A
165 Variable:
166 The following is an example of sending a GETBULK request:
168 Variable: $B
170 Request type is Bulk Request
171 Enter a blank line to terminate the list of non-repeaters
172 and to begin the repeating variables
173 Variable:
174 Now input the repeating variables
175 Variable: system.sysContact.0
176 Variable: system.sysLocation.0
177 Variable:
178 What repeat count? 2
179 Received Get Response from 128.2.56.220
180 requestid 0x2EA7942A errstat 0x0 errindex 0x0
181 SNMPv2-MIB::sysName.0 = STRING: testhost
182 SNMPv2-MIB::sysORLastChange.0 = Timeticks: (58) 0:00:00.58
183 SNMPv2-MIB::sysLocation.0 = STRING: bldg A
184 SNMPv2-MIB::sysORID.1 = OID: IF-MIB::ifMIB
185 Variable:
186 The following is an example of sending an Inform request:
188 snmptest -v 2c -c public snmptrapd_host
190 Variable: $I
191 Request type is Inform Request
192 (Are you sending to the right port?)
193 Variable: system.sysContact.0
194 Type [i|u|sIx|d|n|o|t|a]: s
195 Value: x12345
196 Variable:
197 Inform Acknowledged
198 Variable:
199 The snmptrapd_host will show:
201 snmptrapd_host [<ip address>]: Trap SNMPv2-MIB::sysContact.0 = STRING:
203 x12345
204 The following is an example of sending an SNMPv2 Trap request:
206 snmptest -v 2c -c public snmptrapd_host
208 Variable: $T
209 Request type is SNMPv2 Trap Request
210 (Are you sending to the right port?)
211 Variable: system.sysLocation.0
212 Type [i|u|s|x|d|n|o|t|a]: s
213 Value: building a
214 Variable:
215 The snmptrapd_host will show:
217 snmptrapd_host [<ip address>]: Trap SNMPv2-MIB::sys.0 = STRING:
219 building a
220
222 snmpcmd(1), snmpget(1), snmpset(1), variables(5)
223V5.9.1 25 Jul 2003 SNMPTEST(1)