Latency issues on the VM network?

AdamD · 01-11-2009, 20:07

Noticed my broadband seems a little...er, lacklustre recently

Namely different websites I visit, sometimes take a few seconds to load
Downloads from the USA seem abnormally slow, to
For instance this test download from the Burstnet data centre in New york (http://66.96.192.92/bigtest.tgz) I'm getting about 200kb/sec, which seems slow for an east coast connection
It's the same on other east coast datacentres I've tried, to.

When running a ping on the first hop of my trace to these data centres, I'm getting occasional packet loss and pings as high as 100ms?

When I run a constant trace to an IP in the USA, I seem to hit ping rates as high as 400ms on occasion.

Code:

Host Name                                                  IP Address         Hop    Ping Time   Ping Avg   % Loss    Pkts r/s       Ping best/worst
lanc-cmts-06-lback-20.network.virginmedia.net              86.5.68.1          1      18ms        9ms        0%        50 / 50        4ms / 50ms
brig-core-1a-ge-117-2241.network.virginmedia.net           80.3.65.61         2      9ms         7ms        0%        50 / 50        5ms / 19ms
gfd-bb-a-so-020-0.network.virginmedia.net                  212.43.162.221     3      8ms         9ms        0%        50 / 50        6ms / 37ms
gfd-bb-b-ae0-0.network.virginmedia.net                     213.105.172.6      4      10ms        9ms        4%        48 / 50        5ms / 19ms
redb-ic-1-as0-0.network.virginmedia.net                    62.253.185.78      5      8ms         10ms       0%        50 / 50        7ms / 18ms
cr02.ldn01.pccwbtn.net                                     195.66.224.167     6      20ms        34ms       0%        50 / 50        13ms / 224ms
hostnoc.ge2-3.br01.phl02.pccwbtn.net                       63.218.31.6        7      91ms        96ms       0%        50 / 50        90ms / 289ms
ec1-10.agg01.sctn01.hostnoc.net                            64.191.19.6        8      92ms        93ms       2%        49 / 50        90ms / 103ms
669619292.hostnoc.net                                      66.96.192.92       9      94ms        92ms       0%        50 / 50        90ms / 100ms

Ignitionnet · 01-11-2009, 20:26

The only issue I can see there is that there's a bit of an increase of ping on hop 6 which isn't under VM's control and is a connection to the London Internet Exchange's peering LAN.

Can't see any real issues apart from that, the 24ms average jump across LINX between VM's network at hop 5 and PCCW's network at hop 6.

Given your report of slow download speeds I think that PCCW need to upgrade their LINX ports, my own tests which go via PCCW's other LINX port also show similar latency jump and slow speed.