BT Ireland routing to London for Dublin IPs?

bambam

Trying to work from home today (Rush,Dublin), my office is in City Center.

Today by my ping is 45, whereas another collegue in kilkenny has a ping of 20.

Looking at my tracert I see that I am going through 3 routers in the UK in order to get to a Dublin address. Anyone else notice this nonsense?

---

C:\Documents and Settings\paul>tracert www.imxtra.com

Tracing route to www.imxtra.com [62.17.152.235]
over a maximum of 30 hops:

1 2 ms 1 ms 1 ms voyager.home [192.168.1.1]
2 46 ms 12 ms 16 ms bas001.bmt.esat.net [193.95.142.242]
3 12 ms 13 ms 12 ms vlan101.rt001.bmt.esat.net [193.95.141.1]
4 13 ms 13 ms 14 ms ge0-0.core001.bmt.esat.net [193.95.140.1]
5 14 ms 13 ms 13 ms pos3-0.core001.cwt.esat.net [193.95.131.41]
6 13 ms 14 ms 13 ms ge2-0.br003.cwt.esat.net [193.95.129.23]
7 13 ms 13 ms 13 ms ge-2-3-0-110.dub20.ip.tiscali.net [213.200.67.253]
8 25 ms 25 ms 25 ms ge-4-0-0.lon11.ip.tiscali.net [89.149.186.178]
9 25 ms 23 ms 25 ms POS3-0.BR1.LND18.ALTER.NET [146.188.112.5]
10 25 ms 26 ms 26 ms so-3-2-0.TL1.LND2.ALTER.NET [146.188.3.249]
11 38 ms 38 ms 38 ms so-0-0-0.XR1.DUB2.ALTER.NET [158.43.254.46]
12 38 ms 38 ms 38 ms GigabitEthernet8-0-0.GW1.DUB2.ALTER.NET [158.43.152.3]
13 45 ms 44 ms 42 ms 212.120.134.130

zilog_jones

That domain name is apparently registered by Network Solutions LLC in the UK, so maybe it has to go through there first? The IP address associated with the domain name doesn't appear to be Irish anyway.

It seems to be stopping at 212.120.134.130 (apparently Irish), so I guess that's your firewall or something? I can't ping www.imxtra.com at all from here either (again probably firewall blocking it).

bambam

yep pings are disabled to the destination server, so I'm basing my comparisions on the last one it hits (which is irish - 212.120.134.130)

I reckon the BT routing tables are the problem as this is my work collegues tracert (on Eircom) taken as far as 212.120.134.130 also:

Tracing route to www.imxtra.com [62.17.152.235]
over a maximum of 30 hops:

1 <1 ms <1 ms <1 ms 192.168.1.254
2 12 ms 12 ms 13 ms b-ras1.wtd.waterford.eircom.net [159.134.155.9]
3 14 ms 14 ms 14 ms 86.43.242.66
4 16 ms 16 ms 16 ms 83.71.115.3
5 18 ms 17 ms 17 ms FastEthernet4-0-0.BR1.DUB2.Alter.net [193.242.111.37]
6 19 ms 17 ms 19 ms GigabitEthernet8-0-0.GW1.DUB2.ALTER.NET [158.43.152.3]
7 22 ms 23 ms 24 ms 212.120.134.130
8 * * * Request timed out.

BrandonBlock

I'm on BT too, my tracert to imxtra.com goes through those english routers too.. but if I tracert to boards.ie I get -

  1     1 ms     1 ms     1 ms  192.168.1.33
  2    23 ms    21 ms    18 ms  bas505.cwt.esat.net [193.95.136.241]
  3    19 ms    19 ms    19 ms  vlan501.rt501.cwt.esat.net [193.95.137.124]
  4   144 ms   274 ms   157 ms  vlan51.rt001.cwt.esat.net [193.95.130.137]
  5    21 ms    18 ms    20 ms  ge0-0.br001.cwt.esat.net [193.95.129.4]
  6    19 ms    20 ms    21 ms  to-inex-dub-deg-gw.digiweb.ie [193.242.111.20]
  7    23 ms    21 ms    22 ms  89.234.66.107

So i'd say it's something to do with how BT routes to that particular site (imxtra.com)

Yggr of Asgard

I'm on BT too and I also go via Westminster:

Node Net Reg IP Address      Location            Node Name
   1   -   - 192.168.1.4     Dublin
   2   1   - 192.168.1.1     Unknown             x
   3   2   1 193.95.136.245  DUBLIN              bas508.cwt.esat.net
   4   2   1 193.95.137.125  DUBLIN              vlan501.rt502.cwt.esat.net
   5   2   1 193.95.130.145  DUBLIN              vlan52.rt001.cwt.esat.net
   6   2   1 193.95.129.6    DUBLIN              ge3-0.br003.cwt.esat.net
   7   3   2 213.200.67.253  DUBLIN              ge-2-3-0-110.dub20.ip.tiscali.net
   8   4   2 89.149.186.178  Westminster         ge-4-0-0.lon11.ip.tiscali.net
   9   5   3 146.188.112.5   Westminster         pos3-0.br1.lnd18.alter.net
  10   5   3 146.188.3.249   Westminster         so-3-2-0.tl1.lnd2.alter.net
  11   6   3 158.43.254.46   DUBLIN              so-0-0-0.xr1.dub2.alter.net
  12   6   3 158.43.152.3    DUBLIN              gigabitethernet8-0-0.gw1.dub2.alter.net
  13   7   - 212.120.134.130 DUBLIN              
  14   8   4 62.17.152.235   DUBLIN              www.imxtra.com

Funny routing.

Spear

There was an issue last Monday night MCI and Above.net which may have led to some strange routes. This led to lost traffic and high latency between between Dublin and London sites.

BDW

bambam wrote: »

Trying to work from home today (Rush,Dublin), my office is in City Center.

Today by my ping is 45, whereas another collegue in kilkenny has a ping of 20.

Looking at my tracert I see that I am going through 3 routers in the UK in order to get to a Dublin address. Anyone else notice this nonsense?

---

C:\Documents and Settings\paul>tracert www.imxtra.com

Tracing route to www.imxtra.com [62.17.152.235]
over a maximum of 30 hops:

1 2 ms 1 ms 1 ms voyager.home [192.168.1.1]
2 46 ms 12 ms 16 ms bas001.bmt.esat.net [193.95.142.242]
3 12 ms 13 ms 12 ms vlan101.rt001.bmt.esat.net [193.95.141.1]
4 13 ms 13 ms 14 ms ge0-0.core001.bmt.esat.net [193.95.140.1]
5 14 ms 13 ms 13 ms pos3-0.core001.cwt.esat.net [193.95.131.41]
6 13 ms 14 ms 13 ms ge2-0.br003.cwt.esat.net [193.95.129.23]
7 13 ms 13 ms 13 ms ge-2-3-0-110.dub20.ip.tiscali.net [213.200.67.253]
8 25 ms 25 ms 25 ms ge-4-0-0.lon11.ip.tiscali.net [89.149.186.178]
9 25 ms 23 ms 25 ms POS3-0.BR1.LND18.ALTER.NET [146.188.112.5]
10 25 ms 26 ms 26 ms so-3-2-0.TL1.LND2.ALTER.NET [146.188.3.249]
11 38 ms 38 ms 38 ms so-0-0-0.XR1.DUB2.ALTER.NET [158.43.254.46]
12 38 ms 38 ms 38 ms GigabitEthernet8-0-0.GW1.DUB2.ALTER.NET [158.43.152.3]
13 45 ms 44 ms 42 ms 212.120.134.130

I live in sligo and have had bt broadband for about 3 years if not 4 and as far as I can remember i've always been routed through london,

I have always had better pings to uk servers than irish servers because of this is your friend on bt aswell?

CptSternn

All net connections in Ireland pass through London. It's the closest major hub. I'll have to dig up my internet map and post it here.

Needless to say, everything we do on the internet in this country can easily be monitored in London since 100% of all traffic routes through there first.

SeaSide

CptSternn wrote: »

All net connections in Ireland pass through London. It's the closest major hub. I'll have to dig up my internet map and post it here.

Needless to say, everything we do on the internet in this country can easily be monitored in London since 100% of all traffic routes through there first.

errrr..... not quite.

Dublin has the INEX www.inex.ie where all Irish ISPs will exchange traffic. From looking at the traceroutes posted I would deduce that that both eircom and imxtra take service from Alternet which has a point of presence in Dublin but does not exchange traffic at the INEX. BT's point of interconnection with Alternet is in London which is why traffic trombones there.

JNive

lol.

it depends purely on the ISPs of yourself (which in this case is EsatBT, and they then have certain bandwidth providers) and the provider of your office.

Your office appears to be single-homed with ALTER.net aka Verizon Business - AS702 (MCI/UUNet/Worldcom). As such, if Verizon do not peer with EsatBT or any of its providers at INEX etc, then traffic to it will go via london.

As far as i can see, Verizon only have a customer gateway in Ireland, and do not peer here yet, however they are in INEX do remember them being in INEX a while back, although that no longer appears to be the case

Marlow

CptSternn wrote: »

All net connections in Ireland pass through London. It's the closest major hub. I'll have to dig up my internet map and post it here.

Needless to say, everything we do on the internet in this country can easily be monitored in London since 100% of all traffic routes through there first.

Matter of fact, wrong: Hiberna Atlantic (Magnet's sister company) has fiber from Dublin to Canada, but that's the only. If you aren't on that, you'd have to go to London.

For irish internal connections, it's a matter of where you are peering with whom. You can peer in London, on the INEX or have a private peering somewhere else.

But in this case, BT doesn't seem to have a direct peering in Ireland with MCI/UUNET (last IP is MCI/UUNET), so the traffic just travels the shortest upstream. That's the Internet for you.

/Martin

bambam

thanks for the comments folks, just a couple of points:
1) @BDW: my friend is on Eircom (in Kilkenny)
2) @Seaside, JNive & Marlow - thanks for the information, I'll have a chat with our IT guys, there'll be no changes but at least they'll know the story is if other employees bring this up

update: I had a strenuous conversation with btsupport over this which ended up me being asked to ring back tomorrow as there will be a level 3 support guy available. I'll update the thread with what I hear, but you can all guess the outcome already .

-Bam