Re: Has Level3 done away with traceroute??

[ML <ml () kenweb org>]

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@01D332DA.F4DD00A0]
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