at we were aware of.
PB
From: athomp...@merlin.mb.ca
Sent: Tuesday, January 25, 2022 10:54 AM
To: PAUL R BARFORD ; davidbass...@gmail.com
Cc: nanog@nanog.org
Subject: RE: Long hops on international paths
Peering connection, I think, can explain this.
With
a<http://www.merlin.mb.ca/>
From: NANOG On Behalf Of PAUL
R BARFORD
Sent: Tuesday, January 18, 2022 8:49 AM
To: davidbass...@gmail.com
Cc: nanog@nanog.org
Subject: Re: Long hops on international paths
Hello David,
Understanding the physical topology of the network is not our objective. What
we&
On Tue, Jan 18, 2022 at 6:49 AM PAUL R BARFORD wrote:
> So, the question is what is the cost/benefit to providers to
> configure/maintain routes (that include long MPLS tunnels)
> that tend to concentrate international connectivity at a
> relatively small number of routers?
Most likely that's not
PAUL R BARFORD wrote on 18/01/2022 14:48:
So, the question is what is the cost/benefit to providers to
configure/maintain routes (that include long MPLS tunnels) that tend to
concentrate international connectivity at a relatively small number of
routers?
the cost of mpls TE is pretty low: a c
On Tue, 18 Jan 2022 at 17:27, Mark Tinka wrote:
> > https://ytti.github.io/icmp-eo-timestamp/draft-ytti-intarea-icmp-eo-timestamp.html
> I recall you and I chatted about this some 3 or so years ago. Do you
> know if anyone of the (un)usual suspects have implemented?
I've not even submitted it, s
Thanks Saku and Michael.
From: Saku Ytti
Sent: Tuesday, January 18, 2022 9:17 AM
To: Michael Hare
Cc: PAUL R BARFORD ; Esteban Carisimo
; nanog@nanog.org ; Fabian
E. Bustamante
Subject: Re: Long hops on international paths
On Tue, 18 Jan 2022 at 17:14
On 1/18/22 17:14, Michael Hare via NANOG wrote:
Paul-
You said: "... would decide to configure MPLS paths between Chicago and distant
international locations ..."
AS3128 runs MPLS and it's probable someone might correct me here, but for a IGP
backbone area I think it's common for there to
On 1/18/22 16:28, Saku Ytti wrote:
2) MPLS-TTL expires in transit
2a) generate TTL exceeded and put it back to tunnel, sending it to
egressPE, which is guaranteed to know how to return to sender
This is what we run - our core is BGP-free (LDP), so the traceroute
value customers see will be
On 1/18/22 16:28, Saku Ytti wrote:
2) MPLS-TTL expires in transit
2a) generate TTL exceeded and put it back to tunnel, sending it to
egressPE, which is guaranteed to know how to return to sender
This is what we run - our core is BGP-free (LDP), so the traceroute
value customers see will
On Tue, 18 Jan 2022 at 17:14, Michael Hare wrote:
> AS3128 runs MPLS and it's probable someone might correct me here, but for a
> IGP backbone area I think it's common for there to be a full mesh of LSPs via
> either LDP, RSVP, SR etc. AS3128 is a small regional and we operate in that
> way a
299 has a global MPLS mesh
between major POPs.
-Michael
> -Original Message-
> From: NANOG On
> Behalf Of PAUL R BARFORD
> Sent: Tuesday, January 18, 2022 8:16 AM
> To: Saku Ytti
> Cc: Esteban Carisimo ;
> nanog@nanog.org; Fabian E. Bustamante
> Subject: Re: Long
morrowc.li...@gmail.com ; nanog@nanog.org
Subject: Re: Long hops on international paths
I think a large part of your problem is that you’re using trace route to try
and determine the full topology of a large complex network. It won’t show the
full topology.
On Mon, Jan 17, 2022 at 7:43 PM PAUL
,
"Fabian E. Bustamante"
Sent: Monday, January 17, 2022 11:17:18 PM
Subject: Re: Long hops on international paths
Please find the examples for the case of Telia below.
FROM jfk-us (jfk-us.team-probing.c008820.20201002.warts.gz)
traceroute from 216.66.30.102 (Ark probe host
: Tuesday, January 18, 2022 12:50 AM
> To: PAUL R BARFORD
> Cc: Lukas Tribus ; Esteban Carisimo
> ; nanog@nanog.org ;
> Fabian E. Bustamante
> Subject: Re: Long hops on international paths
>
> 1) all (meaning all hitting the zayo.telia) your traceroutes originate
> from Un
> *From:* morrowc.li...@gmail.com
> *Sent:* Monday, January 17, 2022 5:13 PM
> *To:* PAUL R BARFORD
> *Cc:* Pengxiong Zhu ; nanog@nanog.org
>
> *Subject:* Re: Long hops on international paths
>
>
>
> On Mon, Jan 17, 2022 at 5:31 PM PAUL R BARFORD
t: Tuesday, January 18, 2022 12:50 AM
To: PAUL R BARFORD
Cc: Lukas Tribus ; Esteban Carisimo
; nanog@nanog.org ; Fabian
E. Bustamante
Subject: Re: Long hops on international paths
1) all (meaning all hitting the zayo.telia) your traceroutes originate
from University in Chicago
2) the zayo.telia
2.277 ms
>
> 2 140.192.9.124 0.449 ms
>
> 3 64.124.44.158 0.576 ms
>
> 4 *
>
> 5 *
>
> 6 64.125.15.65 1.814 ms [x] (zayo.telia.ter1.ord7.us.zip.zayo.com.,
> CAIDA-GEOLOC -> Chicago, IL, US)
>
> 7 62.115.114.41 210.056 ms [x] (snge-b5-link.ip.
Looking at your 1 repeat ORD example:
On Tue, Jan 18, 2022 at 12:17 AM PAUL R BARFORD wrote:
> 6 64.125.15.65 1.895 ms [x] (zayo.telia.ter1.ord7.us.zip.zayo.com.,
> CAIDA-GEOLOC -> Chicago, IL, US)
>
> 7 62.115.118.59 99.242 ms[x] (prs-b3-link.ip.twelve99.net.,
> CAIDA-GEOLOC -> Par
_
From: Lukas Tribus
Sent: Monday, January 17, 2022 1:52 PM
To: PAUL R BARFORD
Cc: Nick Hilliard ; nanog@nanog.org ; Esteban
Carisimo ; Fabian E. Bustamante
Subject: Re: Long hops on international paths
On Mon, 17 Jan 2022 at 20:00, PAUL R BARFORD wrote:
> What we're curious about is wh
; still stands.
> I'd be that the paths between 2 continents do not actually land in chicago...
> that you're seeing (or not seeing) missing hops between the coast(s) and
> chicago inside 1299's network in the US.
>
>> Hope that helps.
>>
>> Regards, PB
I get them.
PB
From: morrowc.li...@gmail.com
Sent: Monday, January 17, 2022 5:13 PM
To: PAUL R BARFORD
Cc: Pengxiong Zhu ; nanog@nanog.org
Subject: Re: Long hops on international paths
On Mon, Jan 17, 2022 at 5:31 PM PAUL R BARFORD
mailto:p...@cs.wisc.edu>>
--
> *From:* Pengxiong Zhu
> *Sent:* Monday, January 17, 2022 3:23 PM
> *To:* PAUL R BARFORD
> *Cc:* nanog@nanog.org
> *Subject:* Re: Long hops on international paths
>
> Hi Paul,
>
> Just curious. How do you determine they are the same routers
telltale in the use of "chi" in the domain name.
3.
Hope that helps.
Regards, PB
From: Pengxiong Zhu
Sent: Monday, January 17, 2022 3:23 PM
To: PAUL R BARFORD
Cc: nanog@nanog.org
Subject: Re: Long hops on international paths
Hi Paul,
Just curious.
Carrier class core routers still cost half a million dollars each or (way)
more, so it’s not uncommon for there to be 2-4 in a metro.
And there are only a few metros that have undersea cable landing stations.
We deploy a minimum of a pair of core routers everywhere, but with our
BGP/OSPF/iBGP c
Hi Paul,
Just curious. How do you determine they are the same routers? Is it based
on IP address or MAC addresses? Or using CAIDA’s router alias database?
Also how do you draw the conclusion that the AS1299 router is indeed in
Chicago? IP-geolocation based on rDNS is not always accurate though.
On Mon, 17 Jan 2022 at 20:00, PAUL R BARFORD wrote:
> What we're curious about is why we're seeing a concentration of hops at a
> small number of routers that appear on international paths.
I suggest you share a few actual examples (IP addresses, traceroutes).
I don't think discussing your conc
lliard
Sent: Monday, January 17, 2022 12:36 PM
To: PAUL R BARFORD
Cc: nanog@nanog.org
Subject: Re: Long hops on international paths
PAUL R BARFORD wrote on 17/01/2022 18:02:
> For example, there is a router operated by Telia (AS1299) in Chicago
> that has a high concentration of such link
PAUL R BARFORD wrote on 17/01/2022 18:02:
For example, there is a router operated by Telia (AS1299) in Chicago
that has a high concentration of such links.
this doesn't appear to match 1299's public network topology:
https://www.teliacarrier.com/our-network.html
Is ttl decrement disabled on t
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