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Author(s) Olivier Bonaventure
Deadline No deadline
Submission limit No limitation
Category tags ipv6

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IPv6 : traceroute6

ICMPv6, described in the IPv6 chapter of Computer Networking: Principles, Protocols and Practice is a companion protocol for IPv6 that is used for various functions including network debugging. traceroute6 is a popular debugging tool that allows to trace the path towards a destination.

Reorder UDP segments

traceroute6 sends UDP segments to probe a path. Can you reorder them in this packet trace ?

# Length Summary Status
0 48 bytes User Datagram Protocol, Src Port: 53636, Dst Port: 33440
1 48 bytes User Datagram Protocol, Src Port: 53636, Dst Port: 33437
2 48 bytes User Datagram Protocol, Src Port: 53636, Dst Port: 33439
3 48 bytes User Datagram Protocol, Src Port: 53636, Dst Port: 33436
4 48 bytes User Datagram Protocol, Src Port: 53636, Dst Port: 33438
5 48 bytes User Datagram Protocol, Src Port: 53636, Dst Port: 33435
0000  60041dd500141106  2a0227880484059e  
0010  2c1c849ef74fe233  2606470000100000  
0020  0000000068140155  d18482a00014c707  
0000  `..Õ....*.'.....
0010  ,...÷Oâ3&.G.....
0020  ....h..UÑ.....Ç.
  • Internet Protocol Version 6, Src: 2a02:2788:484:59e:2c1c:849e:f74f:e233, Dst: 2606:4700:10::6814:155
    • 0110 .... = Version: 6
      • .... 0000 0000 .... .... .... .... .... = Traffic Class: 0x00 (DSCP: CS0, ECN: Not-ECT)
        • .... 0000 00.. .... .... .... .... .... = Differentiated Services Codepoint: Default (0)
          • .... .... ..00 .... .... .... .... .... = Explicit Congestion Notification: Not ECN-Capable Transport (0)
          • .... .... .... 0100 0001 1101 1101 0101 = Flow Label: 0x41dd5
            • Payload Length: 20
              • Next Header: UDP (17)
                • Hop Limit: 6
                  • Source: 2a02:2788:484:59e:2c1c:849e:f74f:e233
                    • Destination: 2606:4700:10::6814:155
                    • User Datagram Protocol, Src Port: 53636, Dst Port: 33440
                      • Source Port: 53636
                        • Destination Port: 33440
                          • Length: 20
                            • Checksum: 0xc707 [unverified]
                            0000  60041dd500141103  2a0227880484059e  
                            0010  2c1c849ef74fe233  2606470000100000  
                            0020  0000000068140155  d184829d00144b4e  
                            0000  `..Õ....*.'.....
                            0010  ,...÷Oâ3&.G.....
                            0020  ....h..UÑ.....KN
                            • Internet Protocol Version 6, Src: 2a02:2788:484:59e:2c1c:849e:f74f:e233, Dst: 2606:4700:10::6814:155
                              • 0110 .... = Version: 6
                                • .... 0000 0000 .... .... .... .... .... = Traffic Class: 0x00 (DSCP: CS0, ECN: Not-ECT)
                                  • .... 0000 00.. .... .... .... .... .... = Differentiated Services Codepoint: Default (0)
                                    • .... .... ..00 .... .... .... .... .... = Explicit Congestion Notification: Not ECN-Capable Transport (0)
                                    • .... .... .... 0100 0001 1101 1101 0101 = Flow Label: 0x41dd5
                                      • Payload Length: 20
                                        • Next Header: UDP (17)
                                          • Hop Limit: 3
                                            • Source: 2a02:2788:484:59e:2c1c:849e:f74f:e233
                                              • Destination: 2606:4700:10::6814:155
                                              • User Datagram Protocol, Src Port: 53636, Dst Port: 33437
                                                • Source Port: 53636
                                                  • Destination Port: 33437
                                                    • Length: 20
                                                      • Checksum: 0x4b4e [unverified]
                                                      0000  60041dd500141105  2a0227880484059e  
                                                      0010  2c1c849ef74fe233  2606470000100000  
                                                      0020  0000000068140155  d184829f00140550  
                                                      0000  `..Õ....*.'.....
                                                      0010  ,...÷Oâ3&.G.....
                                                      0020  ....h..UÑ......P
                                                      • Internet Protocol Version 6, Src: 2a02:2788:484:59e:2c1c:849e:f74f:e233, Dst: 2606:4700:10::6814:155
                                                        • 0110 .... = Version: 6
                                                          • .... 0000 0000 .... .... .... .... .... = Traffic Class: 0x00 (DSCP: CS0, ECN: Not-ECT)
                                                            • .... 0000 00.. .... .... .... .... .... = Differentiated Services Codepoint: Default (0)
                                                              • .... .... ..00 .... .... .... .... .... = Explicit Congestion Notification: Not ECN-Capable Transport (0)
                                                              • .... .... .... 0100 0001 1101 1101 0101 = Flow Label: 0x41dd5
                                                                • Payload Length: 20
                                                                  • Next Header: UDP (17)
                                                                    • Hop Limit: 5
                                                                      • Source: 2a02:2788:484:59e:2c1c:849e:f74f:e233
                                                                        • Destination: 2606:4700:10::6814:155
                                                                        • User Datagram Protocol, Src Port: 53636, Dst Port: 33439
                                                                          • Source Port: 53636
                                                                            • Destination Port: 33439
                                                                              • Length: 20
                                                                                • Checksum: 0x0550 [unverified]
                                                                                0000  60041dd500141102  2a0227880484059e  
                                                                                0010  2c1c849ef74fe233  2606470000100000  
                                                                                0020  0000000068140155  d184829c001468c3  
                                                                                0000  `..Õ....*.'.....
                                                                                0010  ,...÷Oâ3&.G.....
                                                                                0020  ....h..UÑ.....hÃ
                                                                                • Internet Protocol Version 6, Src: 2a02:2788:484:59e:2c1c:849e:f74f:e233, Dst: 2606:4700:10::6814:155
                                                                                  • 0110 .... = Version: 6
                                                                                    • .... 0000 0000 .... .... .... .... .... = Traffic Class: 0x00 (DSCP: CS0, ECN: Not-ECT)
                                                                                      • .... 0000 00.. .... .... .... .... .... = Differentiated Services Codepoint: Default (0)
                                                                                        • .... .... ..00 .... .... .... .... .... = Explicit Congestion Notification: Not ECN-Capable Transport (0)
                                                                                        • .... .... .... 0100 0001 1101 1101 0101 = Flow Label: 0x41dd5
                                                                                          • Payload Length: 20
                                                                                            • Next Header: UDP (17)
                                                                                              • Hop Limit: 2
                                                                                                • Source: 2a02:2788:484:59e:2c1c:849e:f74f:e233
                                                                                                  • Destination: 2606:4700:10::6814:155
                                                                                                  • User Datagram Protocol, Src Port: 53636, Dst Port: 33436
                                                                                                    • Source Port: 53636
                                                                                                      • Destination Port: 33436
                                                                                                        • Length: 20
                                                                                                          • Checksum: 0x68c3 [unverified]
                                                                                                          0000  60041dd500141104  2a0227880484059e  
                                                                                                          0010  2c1c849ef74fe233  2606470000100000  
                                                                                                          0020  0000000068140155  d184829e00142924  
                                                                                                          0000  `..Õ....*.'.....
                                                                                                          0010  ,...÷Oâ3&.G.....
                                                                                                          0020  ....h..UÑ.....)$
                                                                                                          • Internet Protocol Version 6, Src: 2a02:2788:484:59e:2c1c:849e:f74f:e233, Dst: 2606:4700:10::6814:155
                                                                                                            • 0110 .... = Version: 6
                                                                                                              • .... 0000 0000 .... .... .... .... .... = Traffic Class: 0x00 (DSCP: CS0, ECN: Not-ECT)
                                                                                                                • .... 0000 00.. .... .... .... .... .... = Differentiated Services Codepoint: Default (0)
                                                                                                                  • .... .... ..00 .... .... .... .... .... = Explicit Congestion Notification: Not ECN-Capable Transport (0)
                                                                                                                  • .... .... .... 0100 0001 1101 1101 0101 = Flow Label: 0x41dd5
                                                                                                                    • Payload Length: 20
                                                                                                                      • Next Header: UDP (17)
                                                                                                                        • Hop Limit: 4
                                                                                                                          • Source: 2a02:2788:484:59e:2c1c:849e:f74f:e233
                                                                                                                            • Destination: 2606:4700:10::6814:155
                                                                                                                            • User Datagram Protocol, Src Port: 53636, Dst Port: 33438
                                                                                                                              • Source Port: 53636
                                                                                                                                • Destination Port: 33438
                                                                                                                                  • Length: 20
                                                                                                                                    • Checksum: 0x2924 [unverified]
                                                                                                                                    0000  60041dd500141101  2a0227880484059e  
                                                                                                                                    0010  2c1c849ef74fe233  2606470000100000  
                                                                                                                                    0020  0000000068140155  d184829b001472dc  
                                                                                                                                    0000  `..Õ....*.'.....
                                                                                                                                    0010  ,...÷Oâ3&.G.....
                                                                                                                                    0020  ....h..UÑ.....rÜ
                                                                                                                                    • Internet Protocol Version 6, Src: 2a02:2788:484:59e:2c1c:849e:f74f:e233, Dst: 2606:4700:10::6814:155
                                                                                                                                      • 0110 .... = Version: 6
                                                                                                                                        • .... 0000 0000 .... .... .... .... .... = Traffic Class: 0x00 (DSCP: CS0, ECN: Not-ECT)
                                                                                                                                          • .... 0000 00.. .... .... .... .... .... = Differentiated Services Codepoint: Default (0)
                                                                                                                                            • .... .... ..00 .... .... .... .... .... = Explicit Congestion Notification: Not ECN-Capable Transport (0)
                                                                                                                                            • .... .... .... 0100 0001 1101 1101 0101 = Flow Label: 0x41dd5
                                                                                                                                              • Payload Length: 20
                                                                                                                                                • Next Header: UDP (17)
                                                                                                                                                  • Hop Limit: 1
                                                                                                                                                    • Source: 2a02:2788:484:59e:2c1c:849e:f74f:e233
                                                                                                                                                      • Destination: 2606:4700:10::6814:155
                                                                                                                                                      • User Datagram Protocol, Src Port: 53636, Dst Port: 33435
                                                                                                                                                        • Source Port: 53636
                                                                                                                                                          • Destination Port: 33435
                                                                                                                                                            • Length: 20
                                                                                                                                                              • Checksum: 0x72dc [unverified]