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Oct 8th, 2016
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  1. lsm1:~ # tcpdump -i eth1 -vvv -s 0 port bootps
  2. tcpdump: listening on eth1, link-type EN10MB (Ethernet), capture size 65535 bytes
  3. 13:34:47.335949 IP (tos 0x10, ttl 64, id 0, offset 0, flags [DF], proto UDP (17), length 328)
  4.     0.0.0.0.bootpc > 255.255.255.255.bootps: [udp sum ok] BOOTP/DHCP, Request from 52:54:00:be:0b:ab (oui Unknown), length 300, xid 0xe5846238, Flags [none] (0x0000)
  5.           Client-Ethernet-Address 52:54:00:be:0b:ab (oui Unknown)
  6.           Vendor-rfc1048 Extensions
  7.             Magic Cookie 0x63825363
  8.             DHCP-Message Option 53, length 1: Request
  9.             Client-ID Option 61, length 5: "vm03"
  10.             Requested-IP Option 50, length 4: 192.168.100.124
  11.             Hostname Option 12, length 4: "vm03"
  12.             Parameter-Request Option 55, length 28:
  13.               RN, RB, Subnet-Mask, BR
  14.               MTU, Classless-Static-Route, Static-Route, Default-Gateway
  15.               Hostname, Option 119, Domain-Name, Domain-Name-Server
  16.               YD, YS, NTP, RP
  17.               LPR-Server, LOG, Option 85, Option 86
  18.               Option 87, Option 120, Netbios-Name-Server, WDD
  19.               Netbios-Node, Netbios-Scope, PRTR, MDHCP
  20.             MSZ Option 57, length 2: 1500
  21.             END Option 255, length 0
  22.             PAD Option 0, length 0, occurs 3
  23. 13:34:47.336306 IP (tos 0xc0, ttl 64, id 13689, offset 0, flags [none], proto UDP (17), length 328)
  24.     lsm.bootps > 255.255.255.255.bootpc: [bad udp cksum 0x25ef -> 0x7c5b!] BOOTP/DHCP, Reply, length 300, xid 0xe5846238, Flags [Broadcast] (0x8000)
  25.           Client-Ethernet-Address 52:54:00:be:0b:ab (oui Unknown)
  26.           Vendor-rfc1048 Extensions
  27.             Magic Cookie 0x63825363
  28.             DHCP-Message Option 53, length 1: NACK
  29.             Server-ID Option 54, length 4: lsm
  30.             MSG Option 56, length 22: "static lease available"
  31.             END Option 255, length 0
  32.             PAD Option 0, length 0, occurs 26
  33. 13:34:48.336930 IP (tos 0x10, ttl 64, id 0, offset 0, flags [DF], proto UDP (17), length 328)
  34.     0.0.0.0.bootpc > 255.255.255.255.bootps: [udp sum ok] BOOTP/DHCP, Request from 52:54:00:be:0b:ab (oui Unknown), length 300, xid 0xe6846238, Flags [none] (0x0000)
  35.           Client-Ethernet-Address 52:54:00:be:0b:ab (oui Unknown)
  36.           Vendor-rfc1048 Extensions
  37.             Magic Cookie 0x63825363
  38.             DHCP-Message Option 53, length 1: Discover
  39.             Client-ID Option 61, length 5: "vm03"
  40.             Parameter-Request Option 55, length 28:
  41.               RN, RB, Subnet-Mask, BR
  42.               MTU, Classless-Static-Route, Static-Route, Default-Gateway
  43.               Hostname, Option 119, Domain-Name, Domain-Name-Server
  44.               YD, YS, NTP, RP
  45.               LPR-Server, LOG, Option 85, Option 86
  46.               Option 87, Option 120, Netbios-Name-Server, WDD
  47.               Netbios-Node, Netbios-Scope, PRTR, MDHCP
  48.             MSZ Option 57, length 2: 1500
  49.             END Option 255, length 0
  50.             PAD Option 0, length 0, occurs 15
  51. 13:34:48.337241 IP (tos 0xc0, ttl 64, id 22536, offset 0, flags [none], proto UDP (17), length 328)
  52.     lsm.bootps > 192.168.100.124.bootpc: [bad udp cksum 0x4b14 -> 0xedf8!] BOOTP/DHCP, Reply, length 300, xid 0xe6846238, Flags [none] (0x0000)
  53.           Your-IP 192.168.100.124
  54.           Server-IP lsm
  55.           Client-Ethernet-Address 52:54:00:be:0b:ab (oui Unknown)
  56.           Vendor-rfc1048 Extensions
  57.             Magic Cookie 0x63825363
  58.             DHCP-Message Option 53, length 1: Offer
  59.             Server-ID Option 54, length 4: lsm
  60.             Lease-Time Option 51, length 4: 3600
  61.             RN Option 58, length 4: 1800
  62.             RB Option 59, length 4: 3150
  63.             Subnet-Mask Option 1, length 4: 255.255.255.0
  64.             BR Option 28, length 4: 192.168.100.255
  65.             Domain-Name-Server Option 6, length 4: lsm
  66.             Default-Gateway Option 3, length 4: lsm
  67.             NTP Option 42, length 4: lsm
  68.             END Option 255, length 0
  69.             PAD Option 0, length 0, occurs 2
  70. 13:34:48.337673 IP (tos 0x10, ttl 64, id 0, offset 0, flags [DF], proto UDP (17), length 337)
  71.     0.0.0.0.bootpc > 255.255.255.255.bootps: [udp sum ok] BOOTP/DHCP, Request from 52:54:00:be:0b:ab (oui Unknown), length 309, xid 0xe7846238, Flags [none] (0x0000)
  72.           Client-Ethernet-Address 52:54:00:be:0b:ab (oui Unknown)
  73.           Vendor-rfc1048 Extensions
  74.             Magic Cookie 0x63825363
  75.             DHCP-Message Option 53, length 1: Request
  76.             Client-ID Option 61, length 5: "vm03"
  77.             Server-ID Option 54, length 4: lsm
  78.             Requested-IP Option 50, length 4: 192.168.100.124
  79.             Hostname Option 12, length 4: "vm03"
  80.             Parameter-Request Option 55, length 28:
  81.               RN, RB, Subnet-Mask, BR
  82.               MTU, Classless-Static-Route, Static-Route, Default-Gateway
  83.               Hostname, Option 119, Domain-Name, Domain-Name-Server
  84.               YD, YS, NTP, RP
  85.               LPR-Server, LOG, Option 85, Option 86
  86.               Option 87, Option 120, Netbios-Name-Server, WDD
  87.               Netbios-Node, Netbios-Scope, PRTR, MDHCP
  88.             MSZ Option 57, length 2: 1500
  89.             Lease-Time Option 51, length 4: 3600
  90.             END Option 255, length 0
  91. 13:34:48.401236 IP (tos 0xc0, ttl 64, id 22543, offset 0, flags [none], proto UDP (17), length 332)
  92.     lsm.bootps > 192.168.100.124.bootpc: [bad udp cksum 0x4b18 -> 0x453e!] BOOTP/DHCP, Reply, length 304, xid 0xe7846238, Flags [none] (0x0000)
  93.           Your-IP 192.168.100.124
  94.           Server-IP lsm
  95.           Client-Ethernet-Address 52:54:00:be:0b:ab (oui Unknown)
  96.           Vendor-rfc1048 Extensions
  97.             Magic Cookie 0x63825363
  98.             DHCP-Message Option 53, length 1: ACK
  99.             Server-ID Option 54, length 4: lsm
  100.             Lease-Time Option 51, length 4: 3600
  101.             RN Option 58, length 4: 1800
  102.             RB Option 59, length 4: 3150
  103.             Subnet-Mask Option 1, length 4: 255.255.255.0
  104.             BR Option 28, length 4: 192.168.100.255
  105.             Domain-Name-Server Option 6, length 4: lsm
  106.             Hostname Option 12, length 4: "vm03"
  107.             Default-Gateway Option 3, length 4: lsm
  108.             NTP Option 42, length 4: lsm
  109.             END Option 255, length 0
  110. ^C
  111. 6 packets captured
  112. 6 packets received by filter
  113. 0 packets dropped by kernel
  114. lsm1:~ # tcpdump -i eth1 -vvv -s 0 port bootps
  115. tcpdump: listening on eth1, link-type EN10MB (Ethernet), capture size 65535 bytes
  116. 13:43:10.091823 IP (tos 0x10, ttl 64, id 0, offset 0, flags [DF], proto UDP (17), length 328)
  117.     0.0.0.0.bootpc > 255.255.255.255.bootps: [udp sum ok] BOOTP/DHCP, Request from 52:54:00:be:0b:ab (oui Unknown), length 300, xid 0xe8846238, Flags [none] (0x0000)
  118.           Client-Ethernet-Address 52:54:00:be:0b:ab (oui Unknown)
  119.           Vendor-rfc1048 Extensions
  120.             Magic Cookie 0x63825363
  121.             DHCP-Message Option 53, length 1: Request
  122.             Client-ID Option 61, length 5: "vm03"
  123.             Requested-IP Option 50, length 4: 192.168.100.124
  124.             Hostname Option 12, length 4: "vm03"
  125.             Parameter-Request Option 55, length 28:
  126.               RN, RB, Subnet-Mask, BR
  127.               MTU, Classless-Static-Route, Static-Route, Default-Gateway
  128.               Hostname, Option 119, Domain-Name, Domain-Name-Server
  129.               YD, YS, NTP, RP
  130.               LPR-Server, LOG, Option 85, Option 86
  131.               Option 87, Option 120, Netbios-Name-Server, WDD
  132.               Netbios-Node, Netbios-Scope, PRTR, MDHCP
  133.             MSZ Option 57, length 2: 1500
  134.             END Option 255, length 0
  135.             PAD Option 0, length 0, occurs 3
  136. 13:43:10.092242 IP (tos 0xc0, ttl 64, id 14184, offset 0, flags [none], proto UDP (17), length 328)
  137.     lsm.bootps > 255.255.255.255.bootpc: [bad udp cksum 0x25ef -> 0x795b!] BOOTP/DHCP, Reply, length 300, xid 0xe8846238, Flags [Broadcast] (0x8000)
  138.           Client-Ethernet-Address 52:54:00:be:0b:ab (oui Unknown)
  139.           Vendor-rfc1048 Extensions
  140.             Magic Cookie 0x63825363
  141.             DHCP-Message Option 53, length 1: NACK
  142.             Server-ID Option 54, length 4: lsm
  143.             MSG Option 56, length 22: "static lease available"
  144.             END Option 255, length 0
  145.             PAD Option 0, length 0, occurs 26
  146. 13:43:11.092791 IP (tos 0x10, ttl 64, id 0, offset 0, flags [DF], proto UDP (17), length 328)
  147.     0.0.0.0.bootpc > 255.255.255.255.bootps: [udp sum ok] BOOTP/DHCP, Request from 52:54:00:be:0b:ab (oui Unknown), length 300, xid 0xe9846238, Flags [none] (0x0000)
  148.           Client-Ethernet-Address 52:54:00:be:0b:ab (oui Unknown)
  149.           Vendor-rfc1048 Extensions
  150.             Magic Cookie 0x63825363
  151.             DHCP-Message Option 53, length 1: Discover
  152.             Client-ID Option 61, length 5: "vm03"
  153.             Parameter-Request Option 55, length 28:
  154.               RN, RB, Subnet-Mask, BR
  155.               MTU, Classless-Static-Route, Static-Route, Default-Gateway
  156.               Hostname, Option 119, Domain-Name, Domain-Name-Server
  157.               YD, YS, NTP, RP
  158.               LPR-Server, LOG, Option 85, Option 86
  159.               Option 87, Option 120, Netbios-Name-Server, WDD
  160.               Netbios-Node, Netbios-Scope, PRTR, MDHCP
  161.             MSZ Option 57, length 2: 1500
  162.             END Option 255, length 0
  163.             PAD Option 0, length 0, occurs 15
  164. 13:43:11.093177 IP (tos 0xc0, ttl 64, id 35610, offset 0, flags [none], proto UDP (17), length 328)
  165.     lsm.bootps > 192.168.100.124.bootpc: [bad udp cksum 0x4b14 -> 0xeaf8!] BOOTP/DHCP, Reply, length 300, xid 0xe9846238, Flags [none] (0x0000)
  166.           Your-IP 192.168.100.124
  167.           Server-IP lsm
  168.           Client-Ethernet-Address 52:54:00:be:0b:ab (oui Unknown)
  169.           Vendor-rfc1048 Extensions
  170.             Magic Cookie 0x63825363
  171.             DHCP-Message Option 53, length 1: Offer
  172.             Server-ID Option 54, length 4: lsm
  173.             Lease-Time Option 51, length 4: 3600
  174.             RN Option 58, length 4: 1800
  175.             RB Option 59, length 4: 3150
  176.             Subnet-Mask Option 1, length 4: 255.255.255.0
  177.             BR Option 28, length 4: 192.168.100.255
  178.             Domain-Name-Server Option 6, length 4: lsm
  179.             Default-Gateway Option 3, length 4: lsm
  180.             NTP Option 42, length 4: lsm
  181.             END Option 255, length 0
  182.             PAD Option 0, length 0, occurs 2
  183. 13:43:11.093556 IP (tos 0x10, ttl 64, id 0, offset 0, flags [DF], proto UDP (17), length 337)
  184.     0.0.0.0.bootpc > 255.255.255.255.bootps: [udp sum ok] BOOTP/DHCP, Request from 52:54:00:be:0b:ab (oui Unknown), length 309, xid 0xea846238, Flags [none] (0x0000)
  185.           Client-Ethernet-Address 52:54:00:be:0b:ab (oui Unknown)
  186.           Vendor-rfc1048 Extensions
  187.             Magic Cookie 0x63825363
  188.             DHCP-Message Option 53, length 1: Request
  189.             Client-ID Option 61, length 5: "vm03"
  190.             Server-ID Option 54, length 4: lsm
  191.             Requested-IP Option 50, length 4: 192.168.100.124
  192.             Hostname Option 12, length 4: "vm03"
  193.             Parameter-Request Option 55, length 28:
  194.               RN, RB, Subnet-Mask, BR
  195.               MTU, Classless-Static-Route, Static-Route, Default-Gateway
  196.               Hostname, Option 119, Domain-Name, Domain-Name-Server
  197.               YD, YS, NTP, RP
  198.               LPR-Server, LOG, Option 85, Option 86
  199.               Option 87, Option 120, Netbios-Name-Server, WDD
  200.               Netbios-Node, Netbios-Scope, PRTR, MDHCP
  201.             MSZ Option 57, length 2: 1500
  202.             Lease-Time Option 51, length 4: 3600
  203.             END Option 255, length 0
  204. 13:43:11.159093 IP (tos 0xc0, ttl 64, id 35646, offset 0, flags [none], proto UDP (17), length 332)
  205.     lsm.bootps > 192.168.100.124.bootpc: [bad udp cksum 0x4b18 -> 0x423e!] BOOTP/DHCP, Reply, length 304, xid 0xea846238, Flags [none] (0x0000)
  206.           Your-IP 192.168.100.124
  207.           Server-IP lsm
  208.           Client-Ethernet-Address 52:54:00:be:0b:ab (oui Unknown)
  209.           Vendor-rfc1048 Extensions
  210.             Magic Cookie 0x63825363
  211.             DHCP-Message Option 53, length 1: ACK
  212.             Server-ID Option 54, length 4: lsm
  213.             Lease-Time Option 51, length 4: 3600
  214.             RN Option 58, length 4: 1800
  215.             RB Option 59, length 4: 3150
  216.             Subnet-Mask Option 1, length 4: 255.255.255.0
  217.             BR Option 28, length 4: 192.168.100.255
  218.             Domain-Name-Server Option 6, length 4: lsm
  219.             Hostname Option 12, length 4: "vm03"
  220.             Default-Gateway Option 3, length 4: lsm
  221.             NTP Option 42, length 4: lsm
  222.             END Option 255, length 0
  223. ^[[A^C
  224. 6 packets captured
  225. 6 packets received by filter
  226. 0 packets dropped by kernel
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