On Sat, May 21, 2011 at 1:11 PM, Jonathan Morton
<chromatix99@gmail.com> wrote:
On 21 May, 2011, at 5:27 pm, Dave Taht wrote:
> Experience the pain of the Internet on another continent! (note that the gw is up on ipv6 as well)
Well, it's not very fast in terms of throughput, but the latency seems to be about as good as I get normally.
It's simulating conditions in South Africa, with settings to 840 down/380 up.
But perhaps that's because I'm starting from Northern Europe and so I'm already used to intercontinental traffic due to the prevalence of US-based servers.
I do see occasional brief stalls during the download, but these are substantially less intrusive than what I get on my 3G modem. They suggest that packets are being dropped at reasonably regular intervals, but the TCP is recovering quickly. I can't tell whether RED is triggering (without ECN) or whether these are tail-drops on a fairly short queue.
Incidentally my download is coming across IPv6, so it may be triggering the related Linux bug.
Which one? on my side all known bugs are fixed. :)
This shouldn't totally disable the negotiation though, so more likely there's a broken router in the way.
And it is highly likely you are interacting with slightly different layer of QoS if you are using IPv6.
Could you take a tcpdump capture and stick it somewhere? Or let me know when you will be running a test and I'll capture traces from here? I did see the wan light flicker madly a few minutes ago....
How be your latency under load too?
- Jonathan