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  1. sunils@sunils-pc ~ $ sudo dhcpdump -i br0
  2. Password:
  3.   TIME: 2018-02-18 11:52:15.138
  4.     IP: 0.0.0.0 (b8:27:eb:d8:79:3) > 255.255.255.255 (ff:ff:ff:ff:ff:ff)
  5.     OP: 1 (BOOTPREQUEST)
  6.  HTYPE: 1 (Ethernet)
  7.   HLEN: 6
  8.   HOPS: 0
  9.    XID: 26f30339
  10.   SECS: 0
  11.  FLAGS: 0
  12. CIADDR: 0.0.0.0
  13. YIADDR: 0.0.0.0
  14. SIADDR: 0.0.0.0
  15. GIADDR: 0.0.0.0
  16. CHADDR: b8:27:eb:d8:79:03:00:00:00:00:00:00:00:00:00:00
  17.  SNAME: .
  18.  FNAME: .
  19. OPTION:  53 (  1) DHCP message type         1 (DHCPDISCOVER)
  20. OPTION:  55 ( 12) Parameter Request List     43 (Vendor specific info)
  21.                           60 (Vendor class identifier)
  22.                           67 (Bootfile name)
  23.                          128 (???)
  24.                          129 (???)
  25.                          130 (???)
  26.                          131 (???)
  27.                          132 (???)
  28.                          133 (???)
  29.                          134 (???)
  30.                          135 (???)
  31.                           66 (TFTP server name)
  32.                          
  33. OPTION:  93 (  2) Client System             0000             ..
  34. OPTION:  94 (  3) Client NDI                010201           ...
  35. OPTION:  97 ( 17) UUID/GUID                 0044444444444444 .DDDDDDD
  36.                          4444444444444444 DDDDDDDD
  37.                          44               D
  38. OPTION:  60 ( 32) Vendor class identifier   PXEClient:Arch:00000:UNDI:002001
  39. ---------------------------------------------------------------------------
  40.  
  41.   TIME: 2018-02-18 11:52:15.139
  42.     IP: 192.168.0.11 (9c:5c:8e:bc:3a:e0) > 255.255.255.255 (ff:ff:ff:ff:ff:ff)
  43.     OP: 2 (BOOTPREPLY)
  44.  HTYPE: 1 (Ethernet)
  45.   HLEN: 6
  46.   HOPS: 0
  47.    XID: 26f30339
  48.   SECS: 0
  49.  FLAGS: 7f80
  50. CIADDR: 0.0.0.0
  51. YIADDR: 0.0.0.0
  52. SIADDR: 0.0.0.0
  53. GIADDR: 0.0.0.0
  54. CHADDR: b8:27:eb:d8:79:03:00:00:00:00:00:00:00:00:00:00
  55.  SNAME: .
  56.  FNAME: bootcode.bin.
  57. OPTION:  53 (  1) DHCP message type         2 (DHCPOFFER)
  58. OPTION:  54 (  4) Server identifier         192.168.0.11
  59. OPTION:  60 (  9) Vendor class identifier   PXEClient
  60. OPTION:  97 ( 17) UUID/GUID                 0044444444444444 .DDDDDDD
  61.                          4444444444444444 DDDDDDDD
  62.                          44               D
  63. OPTION:  43 ( 35) Vendor specific info      0601030a04005058 ......PX
  64.                          4509170000145261 E.....Ra
  65.                          7370626572727920 spberry
  66.                          506920426f6f7420 Pi Boot
  67.                          2020ff             .
  68. ---------------------------------------------------------------------------
  69.  
  70.   TIME: 2018-02-18 11:52:15.139
  71.     IP: 192.168.0.1 (a0:ab:1b:cf:7a:b1) > 255.255.255.255 (ff:ff:ff:ff:ff:ff)
  72.     OP: 2 (BOOTPREPLY)
  73.  HTYPE: 1 (Ethernet)
  74.   HLEN: 6
  75.   HOPS: 0
  76.    XID: 26f30339
  77.   SECS: 0
  78.  FLAGS: 0
  79. CIADDR: 0.0.0.0
  80. YIADDR: 192.168.0.55
  81. SIADDR: 0.0.0.0
  82. GIADDR: 0.0.0.0
  83. CHADDR: b8:27:eb:d8:79:03:00:00:00:00:00:00:00:00:00:00
  84.  SNAME: .
  85.  FNAME: .
  86. OPTION:  53 (  1) DHCP message type         2 (DHCPOFFER)
  87. OPTION:  54 (  4) Server identifier         192.168.0.1
  88. OPTION:  51 (  4) IP address leasetime      86400 (24h)
  89. OPTION:   1 (  4) Subnet mask               255.255.255.0
  90. OPTION:   3 (  4) Routers                   192.168.0.1
  91. OPTION:   6 (  8) DNS server                192.168.0.1,192.168.0.1
  92. ---------------------------------------------------------------------------
  93.  
  94.   TIME: 2018-02-18 11:52:19.818
  95.     IP: 0.0.0.0 (b8:27:eb:d8:79:3) > 255.255.255.255 (ff:ff:ff:ff:ff:ff)
  96.     OP: 1 (BOOTPREQUEST)
  97.  HTYPE: 1 (Ethernet)
  98.   HLEN: 6
  99.   HOPS: 0
  100.    XID: 26f30339
  101.   SECS: 0
  102.  FLAGS: 0
  103. CIADDR: 0.0.0.0
  104. YIADDR: 0.0.0.0
  105. SIADDR: 0.0.0.0
  106. GIADDR: 0.0.0.0
  107. CHADDR: b8:27:eb:d8:79:03:00:00:00:00:00:00:00:00:00:00
  108.  SNAME: .
  109.  FNAME: .
  110. OPTION:  53 (  1) DHCP message type         1 (DHCPDISCOVER)
  111. OPTION:  55 ( 12) Parameter Request List     43 (Vendor specific info)
  112.                           60 (Vendor class identifier)
  113.                           67 (Bootfile name)
  114.                          128 (???)
  115.                          129 (???)
  116.                          130 (???)
  117.                          131 (???)
  118.                          132 (???)
  119.                          133 (???)
  120.                          134 (???)
  121.                          135 (???)
  122.                           66 (TFTP server name)
  123.                          
  124. OPTION:  93 (  2) Client System             0000             ..
  125. OPTION:  94 (  3) Client NDI                010201           ...
  126. OPTION:  97 ( 17) UUID/GUID                 0044444444444444 .DDDDDDD
  127.                          4444444444444444 DDDDDDDD
  128.                          44               D
  129. OPTION:  60 ( 32) Vendor class identifier   PXEClient:Arch:00000:UNDI:002001
  130. ---------------------------------------------------------------------------
  131.  
  132.   TIME: 2018-02-18 11:52:19.819
  133.     IP: 192.168.0.11 (9c:5c:8e:bc:3a:e0) > 255.255.255.255 (ff:ff:ff:ff:ff:ff)
  134.     OP: 2 (BOOTPREPLY)
  135.  HTYPE: 1 (Ethernet)
  136.   HLEN: 6
  137.   HOPS: 0
  138.    XID: 26f30339
  139.   SECS: 0
  140.  FLAGS: 7f80
  141. CIADDR: 0.0.0.0
  142. YIADDR: 0.0.0.0
  143. SIADDR: 0.0.0.0
  144. GIADDR: 0.0.0.0
  145. CHADDR: b8:27:eb:d8:79:03:00:00:00:00:00:00:00:00:00:00
  146.  SNAME: .
  147.  FNAME: bootcode.bin.
  148. OPTION:  53 (  1) DHCP message type         2 (DHCPOFFER)
  149. OPTION:  54 (  4) Server identifier         192.168.0.11
  150. OPTION:  60 (  9) Vendor class identifier   PXEClient
  151. OPTION:  97 ( 17) UUID/GUID                 0044444444444444 .DDDDDDD
  152.                          4444444444444444 DDDDDDDD
  153.                          44               D
  154. OPTION:  43 ( 35) Vendor specific info      0601030a04005058 ......PX
  155.                          4509170000145261 E.....Ra
  156.                          7370626572727920 spberry
  157.                          506920426f6f7420 Pi Boot
  158.                          2020ff             .
  159. ---------------------------------------------------------------------------
  160.  
  161.   TIME: 2018-02-18 11:52:19.819
  162.     IP: 192.168.0.1 (a0:ab:1b:cf:7a:b1) > 255.255.255.255 (ff:ff:ff:ff:ff:ff)
  163.     OP: 2 (BOOTPREPLY)
  164.  HTYPE: 1 (Ethernet)
  165.   HLEN: 6
  166.   HOPS: 0
  167.    XID: 26f30339
  168.   SECS: 0
  169.  FLAGS: 0
  170. CIADDR: 0.0.0.0
  171. YIADDR: 192.168.0.55
  172. SIADDR: 0.0.0.0
  173. GIADDR: 0.0.0.0
  174. CHADDR: b8:27:eb:d8:79:03:00:00:00:00:00:00:00:00:00:00
  175.  SNAME: .
  176.  FNAME: .
  177. OPTION:  53 (  1) DHCP message type         2 (DHCPOFFER)
  178. OPTION:  54 (  4) Server identifier         192.168.0.1
  179. OPTION:  51 (  4) IP address leasetime      86400 (24h)
  180. OPTION:   1 (  4) Subnet mask               255.255.255.0
  181. OPTION:   3 (  4) Routers                   192.168.0.1
  182. OPTION:   6 (  8) DNS server                192.168.0.1,192.168.0.1
  183. ---------------------------------------------------------------------------
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