Has Level3 done away with traceroute??

Thu Sep 21 17:56:31 UTC 2017

I just performed a few traceroutes.

Comcast to 4.2.2.2

5. hu-0-11-0-0-ar03.ivyland.pa.panjde.comcast.net
  6. xe-4-0-0.edge1.Toronto.Level3.net
  7. ???
  8. b.resolvers.Level3.net

Comcast to Level3 customer

  5. hu-0-11-0-0-ar03.ivyland.pa.panjde.comcast.net
  6. xe-4-0-0.edge1.Toronto.Level3.net
  7. ae-11-11.bar1.Philadelphia1.Level3.net
  8. XXXXXXXX.bar1.Philadelphia1.Level3.net

I see the problem for sure FROM a Level3 Philadelphia customer to other 
destinations though.

On 9/21/2017 1:45 PM, Filip Hruska wrote:
> Hi,
>
> Did a measurement with RIPE Atlas and it seems like a worldwide 
> problem, based on data from 100 probes.
>
> https://atlas.ripe.net/measurements/9324230/#!tracemon
>
>
> Dne 9/21/17 v 19:10 Van Dyk, Donovan via NANOG napsal(a):
>> Hello All,
>>
>> Recently I was troubleshooting a network event for a client of our 
>> who resides on the Level3 network. While trying to verify the path, I 
>> noticed I am no longer able to traceroute through the Level3 network.
>> The funny thing is this is not just isolated to the /32. It appears 
>> to be that the entire 4.0.0.0/9 network is no longer able to 
>> traceroute through. Everything dies on their edge network.
>>
>> This appears to be isolated to traceroute. I have check this in NA 
>> and EU.
>>
>> My carrier contacted Level3 who pretty much stated that they can’t 
>> provide anything.
>>
>> I have checked multiple looking glasses and other online tools and 
>> none of them make it. Even Level3 looking glass drops the packets.
>>
>> Does anyone know anything about this? I’m pretty sure this is the 
>> first time we are seeing this.
>>
>>
>> Random 4.0.0.0/9 address.
>>
>> NTT looking glass
>> Tracing the route to 4.35.230.7
>>
>> 1   *
>>      ae-2.a00.snjsca04.us.bb.gin.ntt.net (129.250.3.58) 3 msec 1 msec
>>   2   *  *  *
>>   3   *  *  *
>>   4   *  *  *
>>   5   *  *  *
>>   6   *  *  *
>>
>>
>> TATA looking glass
>> traceroute to 4.7.6.4 (4.7.6.4), 30 hops max, 52 byte packets
>> 1  if-ae-14-3.tcore2.FNM-Frankfurt.as6453.net (195.219.87.89) 2.056 
>> ms if-ae-6-2.tcore1.FR0-Frankfurt.as6453.net (195.219.50.173)  1.253 
>> ms  1.177 ms
>>       MPLS Label=616998 CoS=0 TTL=1 S=1
>> 2  195.219.50.50 (195.219.50.50)  1.214 ms  1.247 ms  1.535 ms
>> 3  195.219.50.50 (195.219.50.50)  1.144 ms *  2.246 ms
>> 4  * * *
>> 5  * * *
>> 6  * * *
>> 7  * * *
>> 8  * * *
>> 9  * * *
>> 10  * * *
>>
>>
>> Telia looking glass
>> traceroute to 4.7.6.4 (4.7.6.4), 30 hops max, 52 byte packets
>> 1  if-ae-14-3.tcore2.FNM-Frankfurt.as6453.net (195.219.87.89) 2.056 
>> ms if-ae-6-2.tcore1.FR0-Frankfurt.as6453.net (195.219.50.173)  1.253 
>> ms  1.177 ms
>>       MPLS Label=616998 CoS=0 TTL=1 S=1
>> 2  195.219.50.50 (195.219.50.50)  1.214 ms  1.247 ms  1.535 ms
>> 3  195.219.50.50 (195.219.50.50)  1.144 ms *  2.246 ms
>> 4  * * *
>> 5  * * *
>> 6  * * *
>> 7  * * *
>> 8  * * *
>> 9  * * *
>> 10  * * *
>>
>>
>> Level3 looking glass
>> Traceroute results from Atlanta, GA to 
>> 4.200.65.42(dialup-4.200.65.42.Dial1.LosAngeles1)
>>
>>    1  0.0.0.0  * * *
>>    2  0.0.0.0  * * *
>>    3  0.0.0.0  * * *
>>    4  0.0.0.0  * * *
>>    5  0.0.0.0  * * *
>>    6  0.0.0.0  * * *
>>    7  0.0.0.0  * * *
>>    8  0.0.0.0  * * *
>>    9  0.0.0.0  * * *
>>   10  0.0.0.0  * * *
>>   11  0.0.0.0  * * *
>>
>> -- 
>> Donovan Van Dyk
>> SOC Network Engineer
>> Fort Lauderdale, FL USA
>>
>> [cid:image001.png at 01D332DA.F4DD00A0]
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>