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Author Topic: HE IPv6 routing issues?  (Read 207 times)

AndrewButterworth

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HE IPv6 routing issues?
« on: November 11, 2021, 12:25:53 AM »

My setup is dual-stack with IPv6 preferred on the Windows clients.  My tunnel terminates on the Paris server.
I noticed delays to some websites recently and it appears that I don't have connectivity to some networks.
For example one of the traceroute asterisk's out for most of the path:

Tracing route to www.quidco.com [2600:9000:218c:e600:12:7bd4:5080:93a1]
over a maximum of 30 hops:

  1     5 ms     9 ms    <1 ms  2001:470:xxxx::xx
  2     6 ms     1 ms     1 ms  2001:470:xxxx::xx
  3    17 ms    17 ms    16 ms  2001:470:xxxx::xx
  4    15 ms    14 ms    14 ms  10ge7-3.core1.par2.he.net [2001:470:0:7b::1]
  5    15 ms    14 ms    14 ms  globeinternet-as6453.10gigabitethernet11-2.core1.par2.he.net [2001:470:0:2c4::2]
  6     *       15 ms     *     if-be-39-2.ecore1.pvu-paris.ipv6.as6453.net [2a01:3e0:ff80::5]
  7    15 ms    15 ms    20 ms  2a01:3e0:ff80:100::4e
  8     *        *        *     Request timed out.
  9     *        *        *     Request timed out.
 10     *        *        *     Request timed out.
 11     *        *        *     Request timed out.
 12    16 ms    15 ms    15 ms  2620:107:4000:cfff::f202:fac3
 13     *        *        *     Request timed out.
 14     *        *        *     Request timed out.
 15     *        *        *     Request timed out.
 16     *        *        *     Request timed out.
 17     *        *        *     Request timed out.
 18     *        *        *     Request timed out.
 19     *        *        *     Request timed out.
 20     *        *        *     Request timed out.
 21     *        *        *     Request timed out.
 22     *        *        *     Request timed out.
 23     *        *        *     Request timed out.
 24     *        *        *     Request timed out.
 25     *        *        *     Request timed out.
 26     *        *        *     Request timed out.
 27     *        *        *     Request timed out.
 28     *        *        *     Request timed out.
 29     *        *        *     Request timed out.
 30     *        *        *     Request timed out.

Trace complete.

Traceroute to google works OK.

Z:\>tracert www.google.co.uk

Tracing route to www.google.co.uk [2a00:1450:4007:813::2003]
over a maximum of 30 hops:

  1     1 ms     5 ms     1 ms  2001:470:xxxx::xx
  2     1 ms     1 ms     1 ms  2001:470:xxxx::xx
  3    18 ms    16 ms    17 ms  2001:470:xxxx::xx
  4    15 ms    15 ms    14 ms  10ge7-3.core1.par2.he.net [2001:470:0:7b::1]
  5    15 ms    15 ms    16 ms  google.equinix-ix.fr [2001:7f8:43::1:5169:1]
  6    16 ms    17 ms    15 ms  2001:4860:0:1016::1
  7    17 ms    15 ms    15 ms  2001:4860:0:1::51f9
  8    15 ms    15 ms    15 ms  par21s06-in-x03.1e100.net [2a00:1450:4007:813::2003]

Trace complete.

Is there a routing issue in the HE network?
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tomkep

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Re: HE IPv6 routing issues?
« Reply #1 on: November 16, 2021, 10:49:26 AM »

That's not a problem with the routing. traceroute like tools usually send UDP packets to DNS port and if it is filitered - there won't be any response. With regular traceroute on Linux I see the same issue (and I am NOT on HE.NET). With traceroute using ICMPv6 probes it finishes on 14th hop.

I am not sure if Windows tracert can send ICMPv6 probes. If yes - give it a try. If not - look for better tool.
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