6ms is impressive. The lowest I've seen so far.
Shame your ISP doubles it!
What length do you reckon your copper tail is? What's attenuation reported as? ![Smiley :)](https://forum.kitz.co.uk/Smileys/kitzemotes/smiley.gif)
That isn't the ISP doubling it. Hop 4 will be at the bRAS location and before any core routing. Liverpool doesnt have a
core node, so most likely that will be somewhere like Manchester. As mentioned in my earlier post 6-7ms is typical to bRAS, its also not unusual to see several hops at the bRAS before it enters the core.
Hop 9 is exiting the core at Ealing.
Most BTw based ISPs except BTretail use L2TP tunnelling so that you never see any of the BTwholesale routing. Many years ago I did some trials for Plusnet's RIN network where they didnt use L2TP and I could see clearly from that I went through Manchester. There used to be
another way you could view your routing, but Im not sure if it works on 21CN - I havent tried it.
I find hop 5 quite interesting though and how things increase by 3ms - yet both hop4 and hop5 resolve to T-MAN (Metropolitan Access Node) but Ive no idea what a T-MAN is - searching throws up something to do with clusters & IPv6 and yet when I look at the next hop after it resolves to BT-UKIP-IPV4. If someone has more info on that please do enlighten
![Smiley :)](https://forum.kitz.co.uk/Smileys/kitzemotes/smiley.gif)
Im not sure if those particular routers in that cluster could even have low priority to ICMP as note how hop 8 has lower latency, which is typical of prioritising ICMP.