Hi Simon, I really appreciate you taking the time to respond.
Based on your email, I've checked from one of our customers firewalls, who's on AS2856, and see the same issue from there too, so obviously not just restricted to PlusNet as I had initially though. >From the BT LG link that you've sent, it shows that from AS4500 there are only two paths - NTT-> IXReach -> here or Vodafone-> Enta -> Here. So I follow it down the chain - Vodafone's LG shows Enta -> here - and obviously further still down the chain Enta shows us as being connected to them. I've also tested from a connection on AS2529 which goes Vodafone -> Enta -> Here, and do NOT see the issue, so to me, this now looks like it's an issue at BT Thanks for pointing me in the right direction; now to see if anyone from BT notices this, or if I'll have to repost changing the subject...... On 9 January 2018 at 13:12, Beevers, Simon <[email protected]> wrote: > Hi Alan, > > I don’t believe anyone from PN is still subscribed to UKNOF, as all of the > people who were (like me) have left. What I can say is that PN no longer > has any public connectivity, other than BT AS2856, so you’ll need use BT’s > looking glass - http://www.bt.net/looking-glass.html > > > > Kind Regards > > Simon > > > > > > *From: *Alan Ramsay <[email protected]> > *Date: *Tuesday, 9 January 2018 at 13:07 > *To: *<[email protected]> > *Subject: *[uknof] PlusNet / Virgin routing weirdness > > > > I'm seeing some routing weirdness from PlusNet xDSL connections to one of > our subnets, and wondered if there was any members from PlusNet and Virgin > on list who could take a look. > > > > We have a subnet 195.2.224.0/24 > <https://emea01.safelinks.protection.outlook.com/?url=http%3A%2F%2F195.2.224.0%2F24&data=02%7C01%7C%7Cae6e8bb0371345677c3008d55761d87a%7C5f7cd26c94dd4a75aaaf9324631d31a9%7C0%7C1%7C636511000154625372&sdata=nABYXbyjqF1fT%2BULCDVWYJtAlKET4FCuVhplYixb%2Bko%3D&reserved=0> > on AS44052 which is dual homed to EntaNet and IXReach. > > > > From a PlusNet xDSL connection, the routing to our router looks quite > sensible when hitting the carrier side IP addresses that are assigned to it: > > > > EntaNet assigned address: > > alan-mbp:~ alanramsay$ traceroute -I 188.39.202.154 > > traceroute to 188.39.202.154 (188.39.202.154), 64 hops max, 72 byte packets > > 1 nat (172.16.10.1) 5.767 ms 3.174 ms 1.931 ms > > 2 410.xe-2-2-0.central10.pcn-bng02.plus.net > <https://emea01.safelinks.protection.outlook.com/?url=http%3A%2F%2F410.xe-2-2-0.central10.pcn-bng02.plus.net&data=02%7C01%7C%7Cae6e8bb0371345677c3008d55761d87a%7C5f7cd26c94dd4a75aaaf9324631d31a9%7C0%7C1%7C636511000154625372&sdata=526Buggm2MTYMa5SSg7Z87TzKQ2L8EwgcyuzZXoI%2B10%3D&reserved=0> > (84.93.253.72) 17.874 ms 17.056 ms 14.640 ms > > 3 411.be6.pcn-ir02.plus.net > <https://emea01.safelinks.protection.outlook.com/?url=http%3A%2F%2F411.be6.pcn-ir02.plus.net&data=02%7C01%7C%7Cae6e8bb0371345677c3008d55761d87a%7C5f7cd26c94dd4a75aaaf9324631d31a9%7C0%7C1%7C636511000154625372&sdata=R6GWZA%2FD5thFaUZlvEhpVr11eaLx8sDPgN8BFJL9TWg%3D&reserved=0> > (84.93.253.79) 17.152 ms 14.379 ms 17.687 ms > > 4 195.99.125.144 (195.99.125.144) 14.960 ms 17.165 ms 14.512 ms > > 5 peer1-et-10-3-0.telehouse.ukcore.bt.net > <https://emea01.safelinks.protection.outlook.com/?url=http%3A%2F%2Fpeer1-et-10-3-0.telehouse.ukcore.bt.net&data=02%7C01%7C%7Cae6e8bb0371345677c3008d55761d87a%7C5f7cd26c94dd4a75aaaf9324631d31a9%7C0%7C1%7C636511000154625372&sdata=RUGCbHHnnbqWPU9FFQlGrglzLKP%2FmBu5dw20Dc%2BNqWA%3D&reserved=0> > (62.172.103.17) 18.485 ms 16.459 ms 14.942 ms > > 6 * * * > > 7 te0-2-0-3.interxion3.core.enta.net > <https://emea01.safelinks.protection.outlook.com/?url=http%3A%2F%2Fte0-2-0-3.interxion3.core.enta.net&data=02%7C01%7C%7Cae6e8bb0371345677c3008d55761d87a%7C5f7cd26c94dd4a75aaaf9324631d31a9%7C0%7C1%7C636511000154625372&sdata=EwGm9YgyLLQtAJR0fL5aYVp6fTnX3evlhs1WZqnbjt4%3D&reserved=0> > (188.39.127.172) 18.420 ms 18.229 ms 17.572 ms > > 8 te0-0-2-0.miltonkeynes.core.enta.net > <https://emea01.safelinks.protection.outlook.com/?url=http%3A%2F%2Fte0-0-2-0.miltonkeynes.core.enta.net&data=02%7C01%7C%7Cae6e8bb0371345677c3008d55761d87a%7C5f7cd26c94dd4a75aaaf9324631d31a9%7C0%7C1%7C636511000154625372&sdata=GpqAah7wru%2FguwYh8VDdHxuG2PDF9%2BZ4nEiZ08KpD4M%3D&reserved=0> > (188.39.127.209) 19.556 ms 18.382 ms 20.486 ms > > 9 te0-0-0-1.birmingham-te.core.enta.net > <https://emea01.safelinks.protection.outlook.com/?url=http%3A%2F%2Fte0-0-0-1.birmingham-te.core.enta.net&data=02%7C01%7C%7Cae6e8bb0371345677c3008d55761d87a%7C5f7cd26c94dd4a75aaaf9324631d31a9%7C0%7C1%7C636511000154625372&sdata=WNShxDMZvziUl6nQHm2Gz6Rd4nDdkurwwD%2FcHtaYAfU%3D&reserved=0> > (188.39.127.212) 22.215 ms 30.097 ms 21.483 ms > > 10 te0-0-0-2.wolv-te.core.enta.net > <https://emea01.safelinks.protection.outlook.com/?url=http%3A%2F%2Fte0-0-0-2.wolv-te.core.enta.net&data=02%7C01%7C%7Cae6e8bb0371345677c3008d55761d87a%7C5f7cd26c94dd4a75aaaf9324631d31a9%7C0%7C1%7C636511000154625372&sdata=m9Uums%2BapqjThVi5HeMxoVMCahxm2HDxwtfvj8BFJMw%3D&reserved=0> > (188.39.127.217) 22.330 ms 25.702 ms 21.107 ms > > 11 188-39-202-154.static.enta.net > <https://emea01.safelinks.protection.outlook.com/?url=http%3A%2F%2F188-39-202-154.static.enta.net&data=02%7C01%7C%7Cae6e8bb0371345677c3008d55761d87a%7C5f7cd26c94dd4a75aaaf9324631d31a9%7C0%7C1%7C636511000154625372&sdata=RuDjILNUnE857uXPjCLYR%2FJyA0zSSBFGOW8N6k%2BU5fI%3D&reserved=0> > (188.39.202.154) 20.173 ms 21.385 ms 20.329 ms > > alan-mbp:~ alanramsay$ > > IXReach assigned address: > > alan-mbp:~ alanramsay$ traceroute -I 31.217.134.34 > > traceroute to 31.217.134.34 (31.217.134.34), 64 hops max, 72 byte packets > > 1 nat (172.16.10.1) 5.455 ms 2.448 ms 2.362 ms > > 2 410.xe-2-2-0.central10.pcn-bng02.plus.net > <https://emea01.safelinks.protection.outlook.com/?url=http%3A%2F%2F410.xe-2-2-0.central10.pcn-bng02.plus.net&data=02%7C01%7C%7Cae6e8bb0371345677c3008d55761d87a%7C5f7cd26c94dd4a75aaaf9324631d31a9%7C0%7C1%7C636511000154635380&sdata=BkcoX1QaO6%2Faszf1DBkWnxRl02CN1yNHhxag%2FHr3ng4%3D&reserved=0> > (84.93.253.72) 16.839 ms 14.814 ms 14.290 ms > > 3 411.be6.pcn-ir01.plus.net > <https://emea01.safelinks.protection.outlook.com/?url=http%3A%2F%2F411.be6.pcn-ir01.plus.net&data=02%7C01%7C%7Cae6e8bb0371345677c3008d55761d87a%7C5f7cd26c94dd4a75aaaf9324631d31a9%7C0%7C1%7C636511000154635380&sdata=9I9bS5PXQm6NjkutHxjgRdw1V8TisTtjtLnSWmTsb7Q%3D&reserved=0> > (84.93.253.75) 15.082 ms 15.229 ms 15.825 ms > > 4 195.99.125.136 (195.99.125.136) 15.509 ms 15.857 ms 16.325 ms > > 5 62.172.103.49 (62.172.103.49) 41.430 ms 17.144 ms 15.461 ms > > 6 * * * > > 7 31.217.134.34 (31.217.134.34) 24.338 ms 21.765 ms 21.651 ms > > alan-mbp:~ alanramsay$ > > > > Now if we try to do a traceroute to the router directly within the > advertised subnet, PlusNet seems to favour the EntaNet connection, but > sends traffic to it via Virgin Media. > > > > alan-mbp:~ alanramsay$ traceroute -I 195.2.224.253 > > traceroute to 195.2.224.253 (195.2.224.253), 64 hops max, 72 byte packets > > 1 nat (172.16.10.1) 4.343 ms 2.126 ms 5.047 ms > > 2 410.xe-2-2-0.central10.pcn-bng02.plus.net > <https://emea01.safelinks.protection.outlook.com/?url=http%3A%2F%2F410.xe-2-2-0.central10.pcn-bng02.plus.net&data=02%7C01%7C%7Cae6e8bb0371345677c3008d55761d87a%7C5f7cd26c94dd4a75aaaf9324631d31a9%7C0%7C1%7C636511000154635380&sdata=BkcoX1QaO6%2Faszf1DBkWnxRl02CN1yNHhxag%2FHr3ng4%3D&reserved=0> > (84.93.253.72) 17.572 ms 16.744 ms 13.716 ms > > 3 411.be6.pcn-ir02.plus.net > <https://emea01.safelinks.protection.outlook.com/?url=http%3A%2F%2F411.be6.pcn-ir02.plus.net&data=02%7C01%7C%7Cae6e8bb0371345677c3008d55761d87a%7C5f7cd26c94dd4a75aaaf9324631d31a9%7C0%7C1%7C636511000154635380&sdata=yKq3rMIsbhTEJqBhL57xLAPHjtKjEieSGC0QtDUkqSk%3D&reserved=0> > (84.93.253.79) 19.078 ms 18.111 ms 15.559 ms > > 4 195.99.125.140 (195.99.125.140) 15.161 ms 15.049 ms 15.472 ms > > 5 peer2-et-1-1-0.redbus.ukcore.bt.net > <https://emea01.safelinks.protection.outlook.com/?url=http%3A%2F%2Fpeer2-et-1-1-0.redbus.ukcore.bt.net&data=02%7C01%7C%7Cae6e8bb0371345677c3008d55761d87a%7C5f7cd26c94dd4a75aaaf9324631d31a9%7C0%7C1%7C636511000154635380&sdata=RdlF5lxP74GRLDReGNyG5IxKiW5tniq5Ih3XwcacvAQ%3D&reserved=0> > (62.172.103.45) 15.296 ms 15.722 ms 17.498 ms > > 6 194.74.65.22 (194.74.65.22) 22.802 ms 27.988 ms 23.007 ms > > 7 * * * > > 8 * * * > > 9 * * * > > *10 **tcl5-ic-5-ae0-0.network.virginmedia.net* > <https://emea01.safelinks.protection.outlook.com/?url=http%3A%2F%2Ftcl5-ic-5-ae0-0.network.virginmedia.net&data=02%7C01%7C%7Cae6e8bb0371345677c3008d55761d87a%7C5f7cd26c94dd4a75aaaf9324631d31a9%7C0%7C1%7C636511000154635380&sdata=bR%2BHXhzrlDOTvsIVr9v%2BoHZPmt9GplWikEop0Dt%2FwfI%3D&reserved=0>* > (62.254.84.66) 28.122 ms 23.156 ms 24.506 ms* > > 11 * * * > > 12 te0-2-0-3.interxion3.core.enta.net > <https://emea01.safelinks.protection.outlook.com/?url=http%3A%2F%2Fte0-2-0-3.interxion3.core.enta.net&data=02%7C01%7C%7Cae6e8bb0371345677c3008d55761d87a%7C5f7cd26c94dd4a75aaaf9324631d31a9%7C0%7C1%7C636511000154635380&sdata=3Hmw%2Fq6mZsapnBAuyp4m66KtCK4i4h2j5cAsupBpo5w%3D&reserved=0> > (188.39.127.172) 23.327 ms 20.859 ms 21.733 ms > > 13 te0-0-2-0.miltonkeynes.core.enta.net > <https://emea01.safelinks.protection.outlook.com/?url=http%3A%2F%2Fte0-0-2-0.miltonkeynes.core.enta.net&data=02%7C01%7C%7Cae6e8bb0371345677c3008d55761d87a%7C5f7cd26c94dd4a75aaaf9324631d31a9%7C0%7C1%7C636511000154635380&sdata=RU%2FZruRP89snuNx4Y1UbCK3EXMW%2Bzhg2EVG3lKC6LHo%3D&reserved=0> > (188.39.127.209) 22.365 ms 23.298 ms 25.178 ms > > 14 te0-0-0-1.birmingham-te.core.enta.net > <https://emea01.safelinks.protection.outlook.com/?url=http%3A%2F%2Fte0-0-0-1.birmingham-te.core.enta.net&data=02%7C01%7C%7Cae6e8bb0371345677c3008d55761d87a%7C5f7cd26c94dd4a75aaaf9324631d31a9%7C0%7C1%7C636511000154635380&sdata=Z%2B4WPI%2FRn3qMpn6lYhDK2YFMa9KyMOdyIufjqWKRhw0%3D&reserved=0> > (188.39.127.212) 26.434 ms 27.137 ms 29.711 ms > > 15 te0-0-0-2.wolv-te.core.enta.net > <https://emea01.safelinks.protection.outlook.com/?url=http%3A%2F%2Fte0-0-0-2.wolv-te.core.enta.net&data=02%7C01%7C%7Cae6e8bb0371345677c3008d55761d87a%7C5f7cd26c94dd4a75aaaf9324631d31a9%7C0%7C1%7C636511000154635380&sdata=srMALOUSbtI2nLvHseQDHoDz7tsE8KDXvcBaS89x1ac%3D&reserved=0> > (188.39.127.217) 31.469 ms 31.309 ms 28.197 ms > > 16 ip195-2-224-253.presscomputers.net > <https://emea01.safelinks.protection.outlook.com/?url=http%3A%2F%2Fip195-2-224-253.presscomputers.net&data=02%7C01%7C%7Cae6e8bb0371345677c3008d55761d87a%7C5f7cd26c94dd4a75aaaf9324631d31a9%7C0%7C1%7C636511000154645388&sdata=0CbrWgLeXG%2BYqdGmE5NFrLmzDf1Cs7bwsQuYzb2wIvU%3D&reserved=0> > (195.2.224.253) 28.177 ms 25.894 ms 27.156 ms > > alan-mbp:~ alanramsay$ > > > > What would cause the traffic to go via Virgin, rather than direct - we can > see when they hit the external PlusNet IP of the router it routes without > going via Virgin. > > > > Any advice on how to resolve this is much appreciated. > > > > Thanks > > > > Alan > > > > > > Privileged/Confidential information may be contained in this Communication > (which includes any attachment). If you are not an intended recipient, you > must not use, copy, disclose, distribute or retain this communication or > any part of it. Instead, please delete all copies of this communication > from your computer system and notify the sender immediately by Registered > office: PCCW Global Networks (UK) plc. Suite 1, 3rd Floor, 11-12, St. > James’s Square, London, SW1Y 4LB > <https://maps.google.com/?q=Suite+1,+3rd+Floor,+11-12,+St.+James%E2%80%99s+Square,+London,+SW1Y+4LB&entry=gmail&source=g> > reply email. Thank you. >
