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When the network administrator realized his mistake, he issued another Set command in Frame 21, with the SNMP community name = administrator, and a value for the Trap Receiver Community = trap1. This time, the SNMP Set command was authenticated and the Response (Frame 22) indicated "no error." The third step occurs in Frames 23 and 24, where a GetNext for the SynOptics private MIB objects (Frame 24) verifies that the value has been written as specified.

Trace 7.3a Verifying a Set command (summary)

  Sniffer Network Analyzer data 23-Sep at 08:40:52 file SNMP71_7.ENC Pg 1
   SUMMARY  Delta T  Destination      Source     Summary
      5     27.1787  [XXX.YYY.170...  Manager    SNMP GetNext
                                                SynOptics.1.3.2.4.1.0 ..
                                                SynOptics.1.3.2.4.21.0
                                                (16 items)
      6     0.2388   Manager          Hub Agent  SNMP GetReply
                                                SynOptics.1.3.2.4.2.0 ..
                                                SynOptics.2.1.1.1.1.1
                                                (16 items)
      7     0.0064   Hub Agent        Manager    SNMP GetNext
                                                SynOptics.1.3.2.4.3.0 ..
                                                SynOptics.1.3.2.4.9.0
                                                (7 items)
                                                SynOptics.1.3.2.4.1 ..
                                                SynOptics.1.3.2.4.21
                                                (16 items)
     24     0.2185   Manager          Hub Agent  SNMP GetReply
                                                SynOptics.1.3.2.4.1.0 ..
                                                SynOptics.1.3.2.4.21.0
                                                (16 items)

Trace 7.3b Verifying a Set command (details)

  Sniffer Network Analyzer data 23-Sep at 08:40:52, file SNMP71_7.ENC,
   Pg 1
  -------------------------- Frame 6 ----------------------------
  SNMP: ----- Simple Network Management Protocol (Version 1) ----
  SNMP:
  SNMP: Version = 0
  SNMP: Community = public
  SNMP: Command = Get response
  SNMP: Request ID = 717281288
  SNMP: Error status = 0 (No error)
  SNMP: Error index = 0
  SNMP:
  SNMP: Object = {1.3.6.1.4.1.45.1.3.2.4.2.0} (SynOptics.1.3.2.4.2.0)
  SNMP: Value = 0
  SNMP:
  SNMP: Object = {1.3.6.1.4.1.45.1.3.2.4.11.0} (SynOptics.1.3.2.4.11.0)
  SNMP: Value = [255.255.255.0]
  SNMP:
  SNMP: Object = {1.3.6.1.4.1.45.1.3.2.4.12.0} (SynOptics.1.3.2.4.12.0)
  SNMP: Value = [XXX.YYY.170.250]
  SNMP:
  SNMP: Object = {1.3.6.1.4.1.45.1.3.2.4.13.0} (SynOptics.1.3.2.4.13.0)
  SNMP: Value = [XXX.YYY.170.20], Manager
  SNMP:
  SNMP: Object = {1.3.6.1.4.1.45.1.3.2.4.14.0} (SynOptics.1.3.2.4.14.0)
  SNMP: Value = /tftpboot/syn2.cfg
  SNMP:
  SNMP: Object = {1.3.6.1.4.1.45.1.3.2.4.15.0} (SynOptics.1.3.2.4.15.0)
  SNMP: Value = 2
  SNMP:
  SNMP: Object = {1.3.6.1.4.1.45.1.3.2.4.16.0} (SynOptics.1.3.2.4.16.0)
  SNMP: Value = 1
  SNMP:
  SNMP: Object = {1.3.6.1.4.1.45.1.3.2.4.17.0} (SynOptics.1.3.2.4.17.0)
  SNMP: Value = 9600 (gauge)
  SNMP:
  SNMP: Object = {1.3.6.1.4.1.45.1.3.2.4.18.0} (SynOptics.1.3.2.4.18.0)
  SNMP: Value =
  SNMP:
  SNMP: Object = {1.3.6.1.4.1.45.1.3.2.4.19.0} (SynOptics.1.3.2.4.19.0)
  SNMP: Value =
  SNMP:
  SNMP: Object = {1.3.6.1.4.1.45.1.3.2.4.20.1.1.XXX.YYY.170.20}
                 (SynOptics.1.3.2.4.20.1.1.XXX.YYY ...
  SNMP: Value = 1
  SNMP:
  SNMP: Object = {1.3.6.1.4.1.45.1.3.2.4.3.0} (SynOptics.1.3.2.4.3.0)
  SNMP: Value = 1
  SNMP:
  SNMP: Object = {1.3.6.1.4.1.45.1.3.2.4.20.1.2.XXX.YYY.170.20}
                   (SynOptics.1.3.2.4.20.1.2.XXX.YYY ...
  SNMP: Value = [XXX.YYY.170.20], Manager
  SNMP:
  SNMP: Object = {1.3.6.1.4.1.45.1.3.2.4.20.1.3.XXX.YYY.170.20}
                   (SynOptics.1.3.2.4.20.1.3.XXX.YYY ...
  SNMP: Value = public
  SNMP:
  SNMP: Object = {1.3.6.1.4.1.45.1.3.2.4.21.0} (SynOptics.1.3.2.4.21.0)
  SNMP: Value = 2
  SNMP:
  SNMP: Object = {1.3.6.1.4.1.45.2.1.1.1.1.1} (SynOptics.2.1.1.1.1.1)
  SNMP: Value = 1
  SNMP:
    .
    .
    .
  -------------------------- Frame 9 ----------------------------
  SNMP: ----- Simple Network Management Protocol (Version 1) ----
  SNMP:
  SNMP: Version = 0
  SNMP: Community = public
  SNMP: Command = Set request
  SNMP: Request ID = 717288552
  SNMP: Error status = 0 (No error)
  SNMP: Error index = 0
  SNMP:
  SNMP: Object = {1.3.6.1.4.1.45.1.3.2.4.20.1.3.XXX.YYY.170.20}
                   (SynOptics.1.3.2.4.20.1.3.XXX.YYY ...
  SNMP: Value = test
  SNMP:
  -------------------------- Frame 10 ---------------------------
  SNMP: ----- Simple Network Management Protocol (Version 1) ----
  SNMP:
  SNMP: Version = 0
  SNMP: Community = public
  SNMP: Command = Trap
  SNMP: Enterprise = {1.3.6.1.4.1.45.3.8.1}
  SNMP: Network address = [XXX.YYY.170.53]
  SNMP: Generic trap = 4 (Authentication failure)
  SNMP: Specific trap = 0
  SNMP: Time ticks = 57631330
  SNMP:
  .
  .
  .
  --------------------------- Frame 21 --------------------------
  SNMP: ----- Simple Network Management Protocol (Version 1) -----
  SNMP:
  SNMP: Version = 0
  SNMP: Community = administrator
  SNMP: Command = Set request
  SNMP: Request ID = 717288651
  SNMP: Error status = 0 (No error)
  SNMP: Error index = 0
  SNMP:
  SNMP: Object = {1.3.6.1.4.1.45.1.3.2.4.20.1.3.XXX.YYY.170.20}
                   (SynOptics.1.3.2.4.20.1.3.XXX.YYY ...
  SNMP: Value = trap1
  SNMP:
  -------------------------- Frame 22 ---------------------------
  SNMP: ----- Simple Network Management Protocol (Version 1) -----
  SNMP:
  SNMP: Version = 0
  SNMP: Community = administrator
  SNMP: Command = Get response
  SNMP: Request ID = 717288651
  SNMP: Error status = 0 (No error)
  SNMP: Error index = 0
  SNMP:
  SNMP: Object = {1.3.6.1.4.1.45.1.3.2.4.20.1.3.XXX.YYY.170.20}
                   (SynOptics.1.3.2.4.20.1.3.XXX.YYY ...
  SNMP: Value = trap1
  SNMP:
  .
  .
  .
  -------------------------- Frame 24 ---------------------------
  SNMP: ----- Simple Network Management Protocol (Version 1) -----
  SNMP:
  SNMP: Version = 0
  SNMP: Community = public
  SNMP: Command = Get response
  SNMP: Request ID = 717281434
  SNMP: Error status = 0 (No error)
  SNMP: Error index = 0
  SNMP:
  SNMP: Object = {1.3.6.1.4.1.45.1.3.2.4.1.0} (SynOptics.1.3.2.4.1.0)
  SNMP: Value = 2
  SNMP:
  SNMP: Object = {1.3.6.1.4.1.45.1.3.2.4.10.0} (SynOptics.1.3.2.4.10.0)
  SNMP: Value = [XXX.YYY.170.53]
  SNMP:
  SNMP: Object = {1.3.6.1.4.1.45.1.3.2.4.11.0} (SynOptics.1.3.2.4.11.0)
  SNMP: Value = [255.255.255.0]
  SNMP:
  SNMP: Object = {1.3.6.1.4.1.45.1.3.2.4.12.0} (SynOptics.1.3.2.4.12.0)
  SNMP: Value = [XXX.YYY.170.250]
  SNMP:
  SNMP: Object = {1.3.6.1.4.1.45.1.3.2.4.13.0} (SynOptics.1.3.2.4.13.0)
  SNMP: Value = [XXX.YYY.170.20], Manager
  SNMP:
  SNMP: Object = {1.3.6.1.4.1.45.1.3.2.4.14.0} (SynOptics.1.3.2.4.14.0)
  SNMP: Value = /tftpboot/syn2.cfg
  SNMP: Value = /tftpboot/syn2.cfg
  SNMP:
  SNMP: Object = {1.3.6.1.4.1.45.1.3.2.4.15.0} (SynOptics.1.3.2.4.15.0)
  SNMP: Value = 2
  SNMP:
  SNMP: Object = {1.3.6.1.4.1.45.1.3.2.4.16.0} (SynOptics.1.3.2.4.16.0)
  SNMP: Value = 1
  SNMP:
  SNMP: Object = {1.3.6.1.4.1.45.1.3.2.4.17.0} (SynOptics.1.3.2.4.17.0)
  SNMP: Value = 9600 (gauge)
  SNMP:
  SNMP: Object = {1.3.6.1.4.1.45.1.3.2.4.18.0} (SynOptics.1.3.2.4.18.0)
  SNMP: Value =
  SNMP:
  SNMP: Object = {1.3.6.1.4.1.45.1.3.2.4.19.0} (SynOptics.1.3.2.4.19.0)
  SNMP: Value =
  SNMP:
  SNMP: Object = {1.3.6.1.4.1.45.1.3.2.4.2.0} (SynOptics.1.3.2.4.2.0)
  SNMP: Value = 0
  SNMP:
  SNMP: Object = {1.3.6.1.4.1.45.1.3.2.4.20.1.1.XXX.YYY.170.20}
                 SynOptics.1.3.2.4.20.1.1.XXX.YYY ...
  SNMP: Value = 1
  SNMP:
  SNMP: Object = {1.3.6.1.4.1.45.1.3.2.4.20.1.2.XXX.YYY.170.20}
                 (SynOptics.1.3.2.4.20.1.2.XXX.YYY ...
  SNMP: Value = [XXX.YYY.170.20], Manager
  SNMP:
  SNMP: Object = {1.3.6.1.4.1.45.1.3.2.4.20.1.3.XXX.YYY.170.20}
                 (SynOptics.1.3.2.4.20.1.3.XXX.YYY ...
  SNMP: Value = trap1
  SNMP:
  SNMP: Object = {1.3.6.1.4.1.45.1.3.2.4.21.0}
                 (SynOptics.1.3.2.4.21.0)
  SNMP: Value = 2
  SNMP:


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