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
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