I don't think that "ping" is a reliable tool in this case, anyway. —
Yes, I can admit you can ping a 10.0.0.1 from your IP, but FI-LAB's
10.0.0.1 doesn't respond to ping from 10.0.0.0/8 – In fact, it drops
those packages.

BR,
José Ignacio.

El 19/05/14 12:39, Jan Kundrát escribió:
> On Monday, 19 May 2014 12:32:37 CEST, José Ignacio Carretero Guarde
> wrote:
>> It seems that somewhere in the european Backbone (62.40.102.15) didn't
>> find FI-LAB's 10.0.0.1
>
> I don't think that the problem is in the GEANT's infrastructure
> because the CESNET node can reach 10.0.0.1 just fine:
>
> [root@potemkin02 ~]# tracepath 10.0.0.1
> 1: 10.0.96.132 (10.0.96.132) 0.102ms
> pmtu 9100
> 1: no reply
> 2: 62.40.124.41 (62.40.124.41) 1.117ms 3:
> 62.40.124.41 (62.40.124.41) 0.951ms pmtu 1488
> 3: no reply
> 4: ae2.mx1.fra.de.geant.net (62.40.98.53) 34.688ms
> asymm 17 5: ae1.mx1.ams.nl.geant.net (62.40.98.129) 35.294ms asymm 16
> 6: ae2.mx1.lon.uk.geant.net (62.40.98.80) 34.594ms
> asymm 15 7: ae7.mx1.dub.ie.geant.net (62.40.98.92)
> 35.314ms asymm 14 8: ae1.mx2.dub.ie.geant.net (62.40.98.91) 34.577ms
> asymm 13 9: 62.40.102.15 (62.40.102.15)
> 34.417ms asymm 11 10: 10.0.0.1
> (10.0.0.1) 34.288ms reached
> Resume: pmtu 1488 hops 10 back 246
>
> In fact, 10.0.0.1 is visible within the trace towards 10.0.3.45 – see
> hop #10:
>
> [root@potemkin02 ~]# tracepath 10.0.3.45
> 1: 10.0.96.132 (10.0.96.132) 0.142ms
> pmtu 9100
> 1: no reply
> 2: 62.40.124.41 (62.40.124.41) 1.060ms 3:
> 62.40.124.41 (62.40.124.41) 1.006ms pmtu 1488
> 3: no reply
> 4: ae2.mx1.fra.de.geant.net (62.40.98.53) 34.700ms
> asymm 17 5: ae1.mx1.ams.nl.geant.net (62.40.98.129) 34.593ms asymm 16
> 6: ae2.mx1.lon.uk.geant.net (62.40.98.80) 34.572ms
> asymm 15 7: ae7.mx1.dub.ie.geant.net (62.40.98.92)
> 34.771ms asymm 14 8: ae1.mx2.dub.ie.geant.net (62.40.98.91) 34.544ms
> asymm 13 9: 62.40.102.15 (62.40.102.15)
> 34.359ms asymm 11 10: 10.0.0.1
> (10.0.0.1) 34.424ms 11: no reply
>
> Despite that, I cannot ping 10.0.3.45 from 10.0.96.132. I can ping
> 10.0.0.1, though.
>
> With kind regards,
> Jan
>

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On Monday, 19 May 2014 12:32:37 CEST, José Ignacio Carretero Guarde wrote:
> It seems that somewhere in the european Backbone (62.40.102.15) didn't
> find FI-LAB's 10.0.0.1

I don't think that the problem is in the GEANT's infrastructure because the
CESNET node can reach 10.0.0.1 just fine:

[root@potemkin02 ~]# tracepath 10.0.0.1
1: 10.0.96.132 (10.0.96.132) 0.102ms pmtu
9100
1: no reply
2: 62.40.124.41 (62.40.124.41) 1.117ms
3: 62.40.124.41 (62.40.124.41) 0.951ms pmtu
1488
3: no reply
4: ae2.mx1.fra.de.geant.net (62.40.98.53) 34.688ms asymm
17
5: ae1.mx1.ams.nl.geant.net (62.40.98.129) 35.294ms asymm
16
6: ae2.mx1.lon.uk.geant.net (62.40.98.80) 34.594ms asymm
15
7: ae7.mx1.dub.ie.geant.net (62.40.98.92) 35.314ms asymm
14
8: ae1.mx2.dub.ie.geant.net (62.40.98.91) 34.577ms asymm
13
9: 62.40.102.15 (62.40.102.15) 34.417ms asymm
11
10: 10.0.0.1 (10.0.0.1) 34.288ms reached
Resume: pmtu 1488 hops 10 back 246

In fact, 10.0.0.1 is visible within the trace towards 10.0.3.45 – see hop
#10:

[root@potemkin02 ~]# tracepath 10.0.3.45
1: 10.0.96.132 (10.0.96.132) 0.142ms pmtu
9100
1: no reply
2: 62.40.124.41 (62.40.124.41) 1.060ms
3: 62.40.124.41 (62.40.124.41) 1.006ms pmtu
1488
3: no reply
4: ae2.mx1.fra.de.geant.net (62.40.98.53) 34.700ms asymm
17
5: ae1.mx1.ams.nl.geant.net (62.40.98.129) 34.593ms asymm
16
6: ae2.mx1.lon.uk.geant.net (62.40.98.80) 34.572ms asymm
15
7: ae7.mx1.dub.ie.geant.net (62.40.98.92) 34.771ms asymm
14
8: ae1.mx2.dub.ie.geant.net (62.40.98.91) 34.544ms asymm
13
9: 62.40.102.15 (62.40.102.15) 34.359ms asymm
11
10: 10.0.0.1 (10.0.0.1) 34.424ms
11: no reply

Despite that, I cannot ping 10.0.3.45 from 10.0.96.132. I can ping
10.0.0.1, though.

With kind regards,
Jan

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Hi,

It seems that somewhere in the european Backbone (62.40.102.15) didn't
find FI-LAB's 10.0.0.1

Best regards,
José Ignacio.

El 19/05/14 12:03, Jan Kundrát escribió:
> Hi,
> I created a testing VM in the FI-LAB region. The VM got assigned a
> private IPv4 address of 10.0.3.45, and I also added a floating IP
> 130.206.83.11. I can access the public IPv4 just fine, but it seems
> that the private, XIFI-federated IPv4 range is having some troubles.
>
> Here's how a tracepath looks from one of our nodes at CESNET:
>
> [root@potemkin02 ~]# tracepath 10.0.3.45 1:
> 10.0.96.132 (10.0.96.132) 0.138ms pmtu
> 9100 1: no reply
> 2: 62.40.124.41 (62.40.124.41) 1.049ms
> 3: 62.40.124.41
> (62.40.124.41) 0.983ms pmtu 1488
> 3: no reply 4:
> ae2.mx1.fra.de.geant.net (62.40.98.53) 34.677ms asymm
> 17 5: ae1.mx1.ams.nl.geant.net
> (62.40.98.129) 34.591ms asymm 16
> 6: ae2.mx1.lon.uk.geant.net
> (62.40.98.80) 34.565ms asymm 15
> 7: ae7.mx1.dub.ie.geant.net
> (62.40.98.92) 34.530ms asymm 14
> 8: ae1.mx2.dub.ie.geant.net
> (62.40.98.91) 34.546ms asymm 13
> 9: 62.40.102.15
> (62.40.102.15) 34.323ms asymm 11
> 10: 10.0.0.1
> (10.0.0.1) 34.403ms
> 11: no reply 12:
> no reply 13: no reply
> 14: no reply 15:
> no reply 16: no reply
> 17: no reply 18:
> no reply 19: no reply
> 20: no reply 21:
> no reply 22: no reply
> 23: no reply 24:
> no reply 25: no reply
> 26: no reply 27:
> no reply
>
> In contrast, this is how a testing tracepath looks from the VM I
> launched:
>
> [root@test-el6-1 ~]# traceroute 10.0.96.1
> traceroute to 10.0.96.1 (10.0.96.1), 30 hops max, 60 byte packets
> 1 10.0.0.1 (10.0.0.1) 20.300 ms 20.272 ms 20.243 ms
> 2 130.206.82.1 (130.206.82.1) 29.885 ms 29.851 ms 29.832 ms
> 3 130.206.82.1 (130.206.82.1) 2936.241 ms !H 2936.227 ms !H
> 2936.205 ms !H
>
> Could you please confirm that this is expected to work? Unfortunately,
> the information about the allocation and utilization of the XIFI-wide
> federated IPv4 space is rather scarce in varioud public deliverables.
> It's well possible that this use case is not supposed to work at all.
> Could you please clarify that?
>
> With kind regards,
> Jan
>

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