Seattle-area centurylink (residential fiber) on the list?

28 Sep 2023

      Howdy,

Is anyone from Centurylink in the Seattle area on the list? Would you
mind contacting me offlist?

My residential fiber has been bouncing for a few hours. I figured it
was something physical and scheduled a technician, but on closer
examination I'm seeing something weird with the PPPoE. It chugs along
happily for a while (dc:38:e1:cd:4f:7a is you, 44:1e:a1:44:70:3f is
me) and then I lose *my* connectivity for 10-20 seconds but during
that window there's a big spew of packets that aren't addressed to me.
The following is just the PPPoE LCP messages captured by tcpdump, but
the misdirected traffic also appears to include TCP/IP user data for
customers who are not me.

20:15:13.278955 44:1e:a1:44:70:3f > dc:38:e1:cd:4f:7a, ethertype PPPoE
S (0x8864), length 30: PPPoE  [ses 0x4e6] LCP (0xc021), length 10:
LCP, Echo-Request (0x09), id 73, length 10
        encoded length 8 (=Option(s) length 4)
          Magic-Num 0xd9ab6924
20:15:13.280651 dc:38:e1:cd:4f:7a > 44:1e:a1:44:70:3f, ethertype PPPoE
S (0x8864), length 56: PPPoE  [ses 0x4e6] LCP (0xc021), length 10:
LCP, Echo-Reply (0x0a), id 73, length 10
        encoded length 8 (=Option(s) length 4)
          Magic-Num 0x24a0da14
20:15:20.712278 dc:38:e1:cd:4f:7a > 44:1e:a1:44:70:3f, ethertype PPPoE
S (0x8864), length 56: PPPoE  [ses 0x4e6] LCP (0xc021), length 10:
LCP, Echo-Request (0x09), id 97, length 10
        encoded length 8 (=Option(s) length 4)
          Magic-Num 0x24a0da14
20:15:20.712418 44:1e:a1:44:70:3f > dc:38:e1:cd:4f:7a, ethertype PPPoE
S (0x8864), length 30: PPPoE  [ses 0x4e6] LCP (0xc021), length 10:
LCP, Echo-Reply (0x0a), id 97, length 10
        encoded length 8 (=Option(s) length 4)
          Magic-Num 0xd9ab6924
20:15:33.291480 44:1e:a1:44:70:3f > dc:38:e1:cd:4f:7a, ethertype PPPoE
S (0x8864), length 30: PPPoE  [ses 0x4e6] LCP (0xc021), length 10:
LCP, Echo-Request (0x09), id 74, length 10
        encoded length 8 (=Option(s) length 4)
          Magic-Num 0xd9ab6924
20:15:53.293020 44:1e:a1:44:70:3f > dc:38:e1:cd:4f:7a, ethertype PPPoE
S (0x8864), length 30: PPPoE  [ses 0x4e6] LCP (0xc021), length 10:
LCP, Echo-Request (0x09), id 75, length 10
        encoded length 8 (=Option(s) length 4)
          Magic-Num 0xd9ab6924
20:15:58.165578 dc:38:e1:cd:4f:7a > 0c:83:cc:e2:46:82, ethertype PPPoE
S (0x8864), length 56: PPPoE  [ses 0x175] LCP (0xc021), length 10:
LCP, Echo-Request (0x09), id 58, length 10
        encoded length 8 (=Option(s) length 4)
          Magic-Num 0x1b3bc70b
20:15:58.312737 dc:38:e1:cd:4f:7a > 0c:83:cc:fb:9c:60, ethertype PPPoE
S (0x8864), length 56: PPPoE  [ses 0x35d] LCP (0xc021), length 10:
LCP, Echo-Request (0x09), id 56, length 10
        encoded length 8 (=Option(s) length 4)
          Magic-Num 0x10318647
20:16:00.517865 dc:38:e1:cd:4f:7a > 88:6a:e3:64:fe:1a, ethertype PPPoE
S (0x8864), length 56: PPPoE  [ses 0x17a] LCP (0xc021), length 10:
LCP, Echo-Request (0x09), id 58, length 10
        encoded length 8 (=Option(s) length 4)
          Magic-Num 0x74677bcb
20:16:01.215725 dc:38:e1:cd:4f:7a > 4c:c5:3e:9e:16:e7, ethertype PPPoE
S (0x8864), length 56: PPPoE  [ses 0x1f9] LCP (0xc021), length 10:
LCP, Echo-Request (0x09), id 57, length 10
        encoded length 8 (=Option(s) length 4)
          Magic-Num 0x2a507cd9
20:16:02.162884 dc:38:e1:cd:4f:7a > d8:ec:e5:04:d7:bd, ethertype PPPoE
S (0x8864), length 56: PPPoE  [ses 0x18f] LCP (0xc021), length 10:
LCP, Echo-Request (0x09), id 57, length 10
        encoded length 8 (=Option(s) length 4)
          Magic-Num 0x53806fa0
20:16:02.911642 dc:38:e1:cd:4f:7a > d8:ec:e5:04:d6:fd, ethertype PPPoE
S (0x8864), length 56: PPPoE  [ses 0x287] LCP (0xc021), length 10:
LCP, Echo-Request (0x09), id 57, length 10
        encoded length 8 (=Option(s) length 4)
          Magic-Num 0x363109e1
20:16:03.315970 dc:38:e1:cd:4f:7a > 0c:83:cc:fe:dc:10, ethertype PPPoE
S (0x8864), length 56: PPPoE  [ses 0x7f] LCP (0xc021), length 10: LCP,
Echo-Request (0x09), id 58, length 10
        encoded length 8 (=Option(s) length 4)
          Magic-Num 0x1916d95f
20:16:05.713807 dc:38:e1:cd:4f:7a > 44:1e:a1:44:70:3f, ethertype PPPoE
S (0x8864), length 56: PPPoE  [ses 0x4e6] LCP (0xc021), length 10:
LCP, Echo-Request (0x09), id 100, length 10
        encoded length 8 (=Option(s) length 4)
          Magic-Num 0x24a0da14
20:16:05.713968 44:1e:a1:44:70:3f > dc:38:e1:cd:4f:7a, ethertype PPPoE
S (0x8864), length 30: PPPoE  [ses 0x4e6] LCP (0xc021), length 10:
LCP, Echo-Reply (0x0a), id 100, length 10
        encoded length 8 (=Option(s) length 4)
          Magic-Num 0xd9ab6924
20:16:08.257543 dc:38:e1:cd:4f:7a > d8:ec:e5:02:1c:b5, ethertype PPPoE
S (0x8864), length 56: PPPoE  [ses 0x23a] LCP (0xc021), length 10:
LCP, Echo-Request (0x09), id 58, length 10
        encoded length 8 (=Option(s) length 4)
          Magic-Num 0x37a24174
20:16:08.858581 dc:38:e1:cd:4f:7a > 0c:83:cc:dd:7b:3c, ethertype PPPoE
S (0x8864), length 56: PPPoE  [ses 0xdd] LCP (0xc021), length 10: LCP,
Echo-Request (0x09), id 58, length 10
        encoded length 8 (=Option(s) length 4)
          Magic-Num 0x79cb769d
20:16:11.912788 dc:38:e1:cd:4f:7a > 4c:c5:3e:75:b2:f4, ethertype PPPoE
S (0x8864), length 56: PPPoE  [ses 0x227] LCP (0xc021), length 10:
LCP, Echo-Request (0x09), id 58, length 10
        encoded length 8 (=Option(s) length 4)
          Magic-Num 0x58cab7de
20:16:12.070053 dc:38:e1:cd:4f:7a > 4c:c5:3e:75:b2:f4, ethertype PPPoE
S (0x8864), length 56: PPPoE  [ses 0x227] LCP (0xc021), length 6: LCP,
Term-Request (0x05), id 10, length 6
        encoded length 4 (=Option(s) length 0)
20:16:13.300753 44:1e:a1:44:70:3f > dc:38:e1:cd:4f:7a, ethertype PPPoE
S (0x8864), length 30: PPPoE  [ses 0x4e6] LCP (0xc021), length 10:
LCP, Echo-Request (0x09), id 76, length 10
        encoded length 8 (=Option(s) length 4)
          Magic-Num 0xd9ab6924
20:16:13.302748 dc:38:e1:cd:4f:7a > 44:1e:a1:44:70:3f, ethertype PPPoE
S (0x8864), length 56: PPPoE  [ses 0x4e6] LCP (0xc021), length 10:
LCP, Echo-Reply (0x0a), id 76, length 10
        encoded length 8 (=Option(s) length 4)
          Magic-Num 0x24a0da14
20:16:13.312884 dc:38:e1:cd:4f:7a > 0c:83:cc:fb:9c:60, ethertype PPPoE
S (0x8864), length 56: PPPoE  [ses 0x35d] LCP (0xc021), length 10:
LCP, Echo-Request (0x09), id 57, length 10
        encoded length 8 (=Option(s) length 4)
          Magic-Num 0x10318647
20:16:13.469980 dc:38:e1:cd:4f:7a > 0c:83:cc:fb:9c:60, ethertype PPPoE
S (0x8864), length 56: PPPoE  [ses 0x35d] LCP (0xc021), length 6: LCP,
Term-Request (0x05), id 243, length 6
        encoded length 4 (=Option(s) length 0)
20:16:15.517997 dc:38:e1:cd:4f:7a > 88:6a:e3:64:fe:1a, ethertype PPPoE
S (0x8864), length 56: PPPoE  [ses 0x17a] LCP (0xc021), length 10:
LCP, Echo-Request (0x09), id 59, length 10
        encoded length 8 (=Option(s) length 4)
          Magic-Num 0x74677bcb
20:16:15.670053 dc:38:e1:cd:4f:7a > 88:6a:e3:64:fe:1a, ethertype PPPoE
S (0x8864), length 56: PPPoE  [ses 0x17a] LCP (0xc021), length 6: LCP,
Term-Request (0x05), id 2, length 6
        encoded length 4 (=Option(s) length 0)
20:16:16.215984 dc:38:e1:cd:4f:7a > 4c:c5:3e:9e:16:e7, ethertype PPPoE
S (0x8864), length 56: PPPoE  [ses 0x1f9] LCP (0xc021), length 10:
LCP, Echo-Request (0x09), id 58, length 10
        encoded length 8 (=Option(s) length 4)
          Magic-Num 0x2a507cd9
20:16:16.370130 dc:38:e1:cd:4f:7a > 4c:c5:3e:9e:16:e7, ethertype PPPoE
S (0x8864), length 56: PPPoE  [ses 0x1f9] LCP (0xc021), length 6: LCP,
Term-Request (0x05), id 149, length 6
        encoded length 4 (=Option(s) length 0)
20:16:17.162973 dc:38:e1:cd:4f:7a > d8:ec:e5:04:d7:bd, ethertype PPPoE
S (0x8864), length 56: PPPoE  [ses 0x18f] LCP (0xc021), length 10:
LCP, Echo-Request (0x09), id 58, length 10
        encoded length 8 (=Option(s) length 4)
          Magic-Num 0x53806fa0
20:16:17.320374 dc:38:e1:cd:4f:7a > d8:ec:e5:04:d7:bd, ethertype PPPoE
S (0x8864), length 56: PPPoE  [ses 0x18f] LCP (0xc021), length 6: LCP,
Term-Request (0x05), id 243, length 6
        encoded length 4 (=Option(s) length 0)
20:16:17.911948 dc:38:e1:cd:4f:7a > d8:ec:e5:04:d6:fd, ethertype PPPoE
S (0x8864), length 56: PPPoE  [ses 0x287] LCP (0xc021), length 10:
LCP, Echo-Request (0x09), id 58, length 10
        encoded length 8 (=Option(s) length 4)
          Magic-Num 0x363109e1
20:16:18.070000 dc:38:e1:cd:4f:7a > d8:ec:e5:04:d6:fd, ethertype PPPoE
S (0x8864), length 56: PPPoE  [ses 0x287] LCP (0xc021), length 6: LCP,
Term-Request (0x05), id 86, length 6
        encoded length 4 (=Option(s) length 0)
20:16:18.316035 dc:38:e1:cd:4f:7a > 0c:83:cc:fe:dc:10, ethertype PPPoE
S (0x8864), length 56: PPPoE  [ses 0x7f] LCP (0xc021), length 10: LCP,
Echo-Request (0x09), id 59, length 10
        encoded length 8 (=Option(s) length 4)
          Magic-Num 0x1916d95f
20:16:18.469998 dc:38:e1:cd:4f:7a > 0c:83:cc:fe:dc:10, ethertype PPPoE
S (0x8864), length 56: PPPoE  [ses 0x7f] LCP (0xc021), length 6: LCP,
Term-Request (0x05), id 31, length 6
        encoded length 4 (=Option(s) length 0)
20:16:20.712679 dc:38:e1:cd:4f:7a > 44:1e:a1:44:70:3f, ethertype PPPoE
S (0x8864), length 56: PPPoE  [ses 0x4e6] LCP (0xc021), length 10:
LCP, Echo-Request (0x09), id 101, length 10
        encoded length 8 (=Option(s) length 4)
          Magic-Num 0x24a0da14
20:16:20.712830 44:1e:a1:44:70:3f > dc:38:e1:cd:4f:7a, ethertype PPPoE
S (0x8864), length 30: PPPoE  [ses 0x4e6] LCP (0xc021), length 10:
LCP, Echo-Reply (0x0a), id 101, length 10
        encoded length 8 (=Option(s) length 4)
          Magic-Num 0xd9ab6924
20:16:23.257678 dc:38:e1:cd:4f:7a > d8:ec:e5:02:1c:b5, ethertype PPPoE
S (0x8864), length 56: PPPoE  [ses 0x23a] LCP (0xc021), length 10:
LCP, Echo-Request (0x09), id 59, length 10
        encoded length 8 (=Option(s) length 4)
          Magic-Num 0x37a24174
20:16:23.420171 dc:38:e1:cd:4f:7a > d8:ec:e5:02:1c:b5, ethertype PPPoE
S (0x8864), length 56: PPPoE  [ses 0x23a] LCP (0xc021), length 6: LCP,
Term-Request (0x05), id 198, length 6
        encoded length 4 (=Option(s) length 0)
20:16:23.858727 dc:38:e1:cd:4f:7a > 0c:83:cc:dd:7b:3c, ethertype PPPoE
S (0x8864), length 56: PPPoE  [ses 0xdd] LCP (0xc021), length 10: LCP,
Echo-Request (0x09), id 59, length 10
        encoded length 8 (=Option(s) length 4)
          Magic-Num 0x79cb769d
20:16:24.020200 dc:38:e1:cd:4f:7a > 0c:83:cc:dd:7b:3c, ethertype PPPoE
S (0x8864), length 56: PPPoE  [ses 0xdd] LCP (0xc021), length 6: LCP,
Term-Request (0x05), id 223, length 6
        encoded length 4 (=Option(s) length 0)
20:16:33.311230 44:1e:a1:44:70:3f > dc:38:e1:cd:4f:7a, ethertype PPPoE
S (0x8864), length 30: PPPoE  [ses 0x4e6] LCP (0xc021), length 10:
LCP, Echo-Request (0x09), id 77, length 10
        encoded length 8 (=Option(s) length 4)
          Magic-Num 0xd9ab6924
20:16:33.313248 dc:38:e1:cd:4f:7a > 44:1e:a1:44:70:3f, ethertype PPPoE
S (0x8864), length 56: PPPoE  [ses 0x4e6] LCP (0xc021), length 10:
LCP, Echo-Reply (0x0a), id 77, length 10
        encoded length 8 (=Option(s) length 4)
          Magic-Num 0x24a0da14

-- 
William Herrin
bill@herrin.us
https://bill.herrin.us/