Short-circuited traceroutes on FIOS
Nimrod Levy
nimrodl at gmail.com
Wed Dec 11 12:19:43 UTC 2019
I'm in the same region as Chris and I still can't make it fail. I wonder if
it's because I have static addressing?
On Tue, Dec 10, 2019 at 11:59 PM Christopher Morrow <morrowc.lists at gmail.com>
wrote:
> On Tue, Dec 10, 2019 at 11:44 PM Lee <ler762 at gmail.com> wrote:
> > It's protocol specific. Windows tracert uses icmp instead of udp.
> > On a linux box try
> > ping -t 2 205.132.109.90
> >
> > You should get a time to live exceeded but the Verizon router gives
> > you an echo reply instead.
>
> that's hilariously bad :( I think this is the OLT really that's doing
> this...
> $ ping -t 3 205.132.109.90
> PING 205.132.109.90 (205.132.109.90) 56(84) bytes of data.
> From 130.81.32.236 icmp_seq=1 Time to live exceeded
>
> $ ping -t 1 205.132.109.90
> PING 205.132.109.90 (205.132.109.90) 56(84) bytes of data.
> From 192.168.100.1 icmp_seq=1 Time to live exceeded
>
> $ ping -t 2 205.132.109.90
> PING 205.132.109.90 (205.132.109.90) 56(84) bytes of data.
> 64 bytes from 205.132.109.90: icmp_seq=1 ttl=254 time=3.38 ms
>
> An outbound traceroute has:
> 1 _gateway (192.168.100.1) 2.537 ms 2.587 ms 2.703 ms
> 2 * * *
> 3 B3320.WASHDC-LCR-21.verizon-gni.net (130.81.32.236) 6.638 ms
> B3320.WASHDC-LCR-22.verizon-gni.net (130.81.32.238) 6.223 ms 6.414
> ms
> ...
>
> and inbound that hop 2 is:
> 6 HundredGigE2-4-0-3.WASHDC-LCR-22.verizon-gni.NET (140.222.238.55)
> 5.504 ms HundredGigE2-6-0-3.WASHDC-LCR-21.verizon-gni.NET
> (140.222.234.53) 9.261 ms 9.266 ms
> 7 ae203-0.WASHDC-VFTTP-320.verizon-gni.net () 7.955 ms 3.026 ms
> ae204-0.WASHDC-VFTTP-320.verizon-gni.net (130.81.32.239) 2.347 ms
>
> oh well, just wonky gpon again?
>
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