Trace:

Tracing route to bbc.co.uk [212.58.224.138]
over a maximum of 30 hops:

1 <1 ms <1 ms <1 ms 10.0.0.2
2 18 ms 17 ms 17 ms losubs.subs.dsl1.mbr-roch.zen.net.uk [62.3.82.17
]
3 18 ms 19 ms 18 ms ae0-136.cr1.mbr-roch.zen.net.uk [62.3.80.137]
4 22 ms 21 ms 19 ms ae2-0.cr1.kp-leeds.zen.net.uk [62.3.80.70]
5 19 ms 18 ms 18 ms ge-3-1-0-0.cr2.kp-leeds.zen.net.uk [62.3.80.74]

6 24 ms 23 ms 23 ms ge-3-0-0-0.cr1.th-lon.zen.net.uk [62.3.80.78]
7 24 ms 24 ms 22 ms 82.71.254.134
8 24 ms 24 ms 24 ms 212.58.238.153
9 24 ms 24 ms 24 ms virtual-vip.thdo.bbc.co.uk [212.58.224.138]

Trace complete.

Stats (delay was 0.25 and channel fast even when interleaving was set to auto but had a ~20ms depth):

Mode: G.DMT
Channel: Fast
Trellis: ON
Line Status: No Defect
Training Status: Showtime
Down Up
SNR (dB): 3.4 25.0
Attn(dB): 31.0 18.0
Pwr(dBm): 19.7 11.9
Max(Kbps): 8896 1136
Rate (Kbps): 8128 448
G.dmt framing
K: 255(0) 15
R: 0 0
S: 1 1
D: 1 1
ADSL2 framing
MSGc: 1 1
B: 239 15
M: 1 1
T: 1 1
R: 0 0
S: 1.0000 1.0000
L: 1920 128
D: 1 1
Counters
SF: 25381917 25381874
SFErr: 19120 10
RS: 0 0
RSCorr: 0 0
RSUnCorr: 0 0

HEC: 12571 6
OCD: 208 0
LCD: 0 0
Total Cells: 3976611804 0
Data Cells: 158188030 0
Drop Cells: 706
Bit Errors: 0 0

ES: 5994 0
SES: 152 0
UAS: 105 0
AS: 431492

INP: 0.00 0.00
PER: 1.75 1.75
delay: 0.25 0.25
OR: 32.00 32.00

Bitswap: 0 0

Edited by deleted (Mon 25-Apr-11 14:21:10)

An update on this. Back up to a 100% increase in latency after two step increases over the past couple of days.

It's a shame that there doesn't seem to be any explanation for this other than "it happens". An interleaved connection would have better latency than Zen on fast path as it stands.

Edited by deleted (Mon 16-May-11 18:12:59)