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Author Topic: Funky route to tserv5.lon  (Read 3142 times)


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Funky route to tserv5.lon
« on: March 02, 2010, 09:09:56 AM »


I'm seeing a funky route between AS5089 (Virgin Media) and yourselves, I've already shot them a message but was wondering if you could also look into it as well :)

alex@blackhole:~$ traceroute -A -q1
traceroute to (, 30 hops max, 60 byte packets
 1 ( [AS28513]  0.359 ms
 2 ( [AS65534]  17.309 ms
 3 ( [AS5089]  18.265 ms
 4 ( [AS5089]  19.233 ms
 5 ( [AS5089]  19.264 ms
 6 ( [AS1299]  70.753 ms
 7 ( [AS1299]  69.758 ms
 8 ( [AS1299]  79.334 ms
 9 (
  •  78.348 ms

10 ( [AS1299]  80.248 ms
11 ( [AS6939]  79.574 ms
12 ( [AS6939]  83.631 ms

It's perfectly fine from my own BGP network in London so I figured it must be a peering issues between your two ASN's.



Edit: It looks like they have issues with their AMS-IX connectivity but I'm pretty certain you used to peer with them at LINX?
« Last Edit: March 02, 2010, 10:30:18 AM by darkorb »


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Re: Funky route to tserv5.lon
« Reply #1 on: March 02, 2010, 11:08:52 AM »

I'm also on virgin media and have had the same issue for a few week, HE had a look and said it was a problem with the way virgin media routes the connection.
I tried talking to virgin media about it but trying to find someone that understands is mission impossible, i hope you have more luck than me.
at least its not as bad as it was a few weeks ago when they (virgin) were routing us via then
then finally


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Re: Funky route to tserv5.lon
« Reply #2 on: March 02, 2010, 11:28:04 AM »

Correct, we do peer with them at LINX and the issue is their return path to us, they prefer to send traffic over Telia and back to us rather than hand it back to us over the peering session. I emailed them about this but didn't hear anything back. I'll try and poke them again.


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Re: Funky route to tserv5.lon
« Reply #3 on: March 03, 2010, 03:44:09 AM »

Thanks. I've been trying to explain it to them as it's a wider problem that they are having (latency quadrupling in peak times isn't good), hopefully now I've armed myself with Smokeping graph's I'll have some more luck :) I just thought it was odd they didn't do it via LINX with their LINX peers, unless they don't have the spare capacity ???