route between 2001:470::/32 (HE Paris) and 2001:41d0::/32 (OVH) dead

[davidamadore]

The route between the HE Paris tunnel endpoint (2001:470::/32) and 2001:41d0::/32 (OVH, AS16276) seems broken.  Sample output from the looking glass:

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core1.par1.he.net> traceroute ipv6 2001:41d0::16e

Sending DNS Query to 216.218.252.93

Tracing the route to IPv6 node gsw-g1-a9.fr.eu(2001:41d0::16e)from 1 to 30 hops

  1     8 ms   <1 ms   <1 ms 10gigabitethernet1-1.core1.par2.he.net [2001:470:0:1b0::2]
  2    <1 ms   45 ms   40 ms gin-pvu-icore1.as6453.net [2001:7f8:43::6453:1]
  3     9 ms    1 ms    1 ms if-ae2.2.tcore1.PVU-Paris.ipv6.as6453.net [2a01:3e0:fff0:400::d]
  4    *       *       *     ?
  5    *       *       *     ?
  6    *       *       *     ?
  7    *       *       *     ?
IP: Errno(8) Trace Route Failed, no response from target node.
# Entry cached for another 31 seconds.

core1.fmt1.he.net> traceroute ipv6 2001:41d0::16e

Tracing the route to IPv6 node 2001:41d0::16e from 1 to 30 hops

  1     6 ms   <1 ms   <1 ms 2001:470:0:2f::2
  2    <1 ms   <1 ms   12 ms 2001:2000:3080:1b7::1
  3   140 ms  117 ms  116 ms 2001:2000:3018:30::1
  4    *       *       *     ?
  5    *       *       *     ?
  6    *       *       *     ?
  7    *       *       *     ?
IP: Errno(8) Trace Route Failed, no response from target node.

# Entry cached for another 6 seconds.



Is there some place one can (should) report this sort of things?

I don't grok BGP, so I don't know how to analyze the problem and determine who's at fault.

(This route is terribly important to me because my home PC's are use the HE tunnel in question and one of my servers is hosted by OVH.)

[cholzhauer]

Ipv6@he.net

[kasperd]

I tested traceroute to 2001:41d0::16e through two different tunnel brokers, native IPv6, and 6to4. I did not get a reply from 2001:41d0::16e using any of those four methods.

[redvip]

It's still down, don't know who's at fault here, but in the HE.net end you can see that it's not working in the BGP Status:

http://ipv6.he.net/bgpview/bgp.html -> http://ipv6.he.net/bgpview/200x-stability.html -> http://ipv6.he.net/bgpview/24h_history/FR-OVH-20041115.html

I also have one he.net tunnel at home and one server at ovh in france, I can ping6 google, bing, kame.net at home and from the server in ovh, but I can't ping between home and server in either way.

[OlivierW]

This thread is probably related to this one : http://www.tunnelbroker.net/forums/index.php?topic=2823.0
One more example : I can't access www.freenews.fr which is also on OVH.

[plugwash]

I just tested from freenet6 and bytemark

freenet6:
traceroute to 2001:41d0::16e (2001:41d0::16e), 30 hops max, 80 byte packets
1  2001:5c0:1400:a::350 (2001:5c0:1400:a::350)  24.882 ms  30.845 ms  30.948 ms
2  ve8.ipv6.colo-rx4.eweka.nl (2001:4de0:1000:a22::1)  31.076 ms  31.151 ms  31.228 ms
3  9-1.ipv6.r2.am.hwng.net (2001:4de0:a::1)  40.663 ms  40.769 ms  40.869 ms
4  * * *

bytemark:
traceroute to 2001:41d0::16e (2001:41d0::16e), 30 hops max, 80 byte packets
1  gateway.vlan855.bytemark.co.uk (2001:41c8:10:200::1)  0.509 ms  0.494 ms  0.500 ms
2  2001:41c8:0:104::1 (2001:41c8:0:104::1)  0.469 ms  0.474 ms  0.655 ms
3  te-8-1.car1.Manchester1.Level3.net (2001:1900:5:2:2::136d)  0.457 ms  0.455 ms  0.632 ms
4  vl-4062.edge4.London1.Level3.net (2001:1900:5:1::241)  6.304 ms  6.304 ms  6.296 ms
5  vl-4081.edge3.London1.Level3.net (2001:1900:5:1::105)  6.454 ms vl-4080.edge3.London1.Level3.net (2001:1900:5:1::101)  6.443 ms vl-4081.edge3.London1.Level3.net (2001:1900:5:1::105)  6.438 ms
6  * * *

From looking at these traces and from the BGP stuff redvip linked it seems pretty clear to me that the problem is on ovh's end. I would suggest telling them to fix their IPv6 connectivity and if they fail to do so in a reasonable time to stop doing buisness with them.

[gawamakito]

I think problem is on OVH side, since I can not reach your destination also.

E:\>tracert 2001:41d0::16e

Tracing route to gsw-g1-a9.fr.eu [2001:41d0::16e]
over a maximum of 30 hops:

  1    <1 ms    <1 ms    <1 ms  gw-8000.s04.ipv6.tnc92.net [2400:8900:efff:8000:
:1]
  2    <1 ms    <1 ms    <1 ms  ge-5.r01-pnh.tnc92.net [2400:8900:efff:2001::1]

  3   105 ms   105 ms   105 ms  r01-tyo.p2p-3013.s04.ipv6.tnc92.net [2400:8900:e
fff:3013::2]
  4   105 ms   105 ms   106 ms  2400:8900:ffff:0:4255:39ff:fea7:57bf
  5   107 ms   105 ms   105 ms  2001:268:f702:6c::1
  6   131 ms   107 ms   106 ms  6otejbb206.int-gw.kddi.ne.jp [2001:268:fb13:2::1
]
  7   205 ms   207 ms   206 ms  6pajbb002.int-gw.kddi.ne.jp [2001:268:fb02:55::2
]
  8   224 ms   218 ms   212 ms  6ix-pa7.int-gw.kddi.ne.jp [2001:268:fb81:4::2]
  9   246 ms   212 ms   212 ms  kddi.paloalto2.pao.seabone.net [2001:41a8:4060:2
::25]
10   300 ms   289 ms   289 ms  mia15-loop0-v6.mia.seabone.net [2001:41a8:4020::
f]
11     *        *        *     Request timed out.
12     *        *        *     Request timed out.
13     *        *        *     Request timed out.
14     *        *        *     Request timed out.
15     *        *        *     Request timed out.
16     *        *        *     Request timed out.
17  ^C
E:\>

[jrocha]

This should be cleared up now. Go ahead and test things again.

[plugwash]

Still seems broken according to the he looking glass and according to my own traceroutes from freenet6 and bytemark.

[kasperd]

Still seems broken

Did 2001:41d0::16e ever respond? Look at a traceroute to a functional IP address in that network.

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traceroute to ipv6-test.com (2001:41d0:1:d87c::7e57:1), 30 hops max, 80 byte packets
1  2a01:d0:839a:babe:735d:77a7:990d:702c  0.099 ms  0.113 ms  0.140 ms
2  2a01:d0:ffff:39a::1  63.639 ms  65.097 ms  67.204 ms
3  2a01:d0:0:1c::19  66.002 ms  64.358 ms  64.391 ms
4  2001:470:1:70::1  101.647 ms  101.694 ms  100.798 ms
5  2001:470:0:168::2  141.828 ms  140.708 ms  140.732 ms
6  2001:2000:3018:18::1  125.489 ms  125.534 ms  125.531 ms
7  *  *  *
8  2001:41d0::c32  211.142 ms  211.792 ms  211.795 ms
9  2001:41d0::731  211.818 ms  *  *
10  2001:41d0::5a1  171.366 ms  171.389 ms  172.004 ms
11  2001:41d0::b71  170.711 ms  125.299 ms  125.309 ms
12  2001:41d0::aa2  125.646 ms  *  *
13  *  2001:41d0:1:d87c::7e57:1  104.438 ms  122.608 msOn the route I see multiple replies from 2001:41d0::/112. But if I try to do a traceroute to any of those addresses I get no reply past the border of that network. It can't be just the router not responding to echo request, as I don't see replies from the earlier routers either.

Code Select Expand

traceroute to 2001:41d0::aa2 (2001:41d0::aa2), 30 hops max, 80 byte packets
1  2a01:d0:839a:babe:735d:77a7:990d:702c  0.134 ms  0.113 ms  0.137 ms
2  2a01:d0:ffff:39a::1  76.237 ms  77.910 ms  80.864 ms
3  2a01:d0:0:1c::19  80.237 ms  60.822 ms  61.170 ms
4  2001:470:1:70::1  90.623 ms  91.253 ms  88.949 ms
5  2001:470:0:168::2  121.664 ms  121.495 ms  121.528 ms
6  2001:2000:3018:18::1  124.930 ms  124.224 ms  124.238 ms
7  *  *  *
8  *  *  *
9  *  *  *
10  *  *  *
11  *  *  *
12  *  *  *
13  *  *  *
14  *  *  *
15  *  *  *
16  *  *  *
17  *  *  *
18  *  *  *
19  *  *  *
20  *  *  *
21  *  *  *
22  *  *  *
23  *  *  *
24  *  *  *
25  *  *  *
26  *  *  *
27  *  *  *
28  *  *  *
29  *  *  *
30  *  *  *Either they have some weird filter on the border of their network. Or they simply don't have a working route to 2001:41d0::/112, but use it as source address for ICMPv6 errors anyway.

[redvip]

So far I haven't heard anything back from OVH in their forums http://foros.ovh.es/showthread.php?t=10826 (in spanish as I'm a spanish customer)

In the OVH BGP status (http://ipv6.he.net/bgpview/24h_history/FR-OVH-20041115.html) is still marked as not working, but I can ping and access my server from home and viceversa:

Code Select Expand


traceroute -6 -I -A noticias.juridicas.com
traceroute to noticias.juridicas.com (2001:41d0:2:f1ca::2), 30 hops max, 80 byte packets
1  2001:470:1f13:5bd::1 (2001:470:1f13:5bd::1) [AS6939]  0.439 ms  1.374 ms  0.416 ms
2  redvip-1.tunnel.tserv10.par1.ipv6.he.net (2001:470:1f12:5bd::1) [AS6939]  84.667 ms  77.440 ms  83.475 ms
3  gige-g2-3.core1.par1.he.net (2001:470:0:7b::1) [AS6939]  69.441 ms  80.180 ms  75.516 ms
4  10gigabitethernet1-1.core1.par2.he.net (2001:470:0:1b0::2) [AS6939]  78.030 ms  69.373 ms  76.836 ms
5  gin-pvu-icore1.as6453.net (2001:7f8:43::6453:1) [AS44729]  77.714 ms  76.967 ms  70.432 ms
6  if-ae12.2.tcore1.PVU-Paris.ipv6.as6453.net (2a01:3e0:fff0:400::46) [AS6453]  76.496 ms  81.910 ms  67.660 ms
7  * 2a01:3e0:ff80:100::36 (2a01:3e0:ff80:100::36) [AS6453]  113.589 ms *
8  gsw-g1-a9.fr.eu (2001:41d0::16e) [AS16276]  75.533 ms * *
9  rbx-g2-a9.fr.eu (2001:41d0::16b) [AS16276]  101.266 ms  92.068 ms  95.515 ms
10  vss-8b-6k.fr.eu (2001:41d0::173) [AS16276]  88.103 ms  96.249 ms  82.384 ms
11  2001:41d0:2:f1ca::2 (2001:41d0:2:f1ca::2) [AS16276]  83.065 ms  99.247 ms  94.131 ms


As it's not posted here I will paste the answer I received from ipv6@he.net:

OVH is apparently trying to route traffic to us over an exchange where
we do not peer, and as such, the traffic is being dropped at our border.
If this issue persists, you can contact OVH if you are their customer.