Cyprus Broadband Forum

Hi guys,

Has anyone noticed traffic shaping from OTENET for bittorrent traffic? In the past few days i am noticing that BT traffic is capped at 30kb/s.

To verify that its not a seeding problem i tried downloading popular seeds such as linux distros and the speed stays capped at 30kb/s well below the maximum bandwidth i am paying for.

I am using Otenet and I recently get much higher speeds with torrents.

http://www.cyprusbroadband.net/forum/general-broadband-discussion/500kbs-from-ichoice-1000-t68.0.html

Are you using i-choice + Otenet or just Otenet?

I recommend you to try to change your WAN ip, (i don't know how is done on Otenet) run speed tests and download from an http direct link to verify your speed

i think otenet and primetel is capping their speeds

There is no way to change your OTENET wan ip.
In fact OTENET is using NAT for your internet connection and as such there is a limit to the number of simultaneous incoming connections you can have to your internal ip.
From my last conversation with them the nat table limit was 1000 , which means you could have up to 1000 connections, which might seem reasonable if all connections were closed in a proper manner. If a connection is not closed properly then the NAT entry remains and keeps a slot and will expire after several hours of inactivity.

BT needs a lot of connections to perform and a lot of bt clients do not close their tcp sessions normally. Which fills up your NAT table and thus limiting your connections and hence speed.

I suggest you stop all activity besides surfing for a day and limit your bt client to 100 connections only. You should do the same any other p2p software you are using. This will help a bit especially if you only download 1 torrent at a time.

I'm using plain OTENET, no ichoice.

I don't think its a case of NAT because there is only one BT connection from a big seeder (try OpenOffice for example) and the max download speed is 30KB/s

I found a way of testing if OTENET is capping BT traffic and i plan to conduct some tests over the next days and see. I will do the same with Cytanet to see the differences.

As for my Otenet WAN IP, OTENET gives me 3 IP's 2 of which are on their internal Class A network (10.*.*.*) and one which is on a public network and changes dynamically (PPPoE) however i don't recall when the last time was that it changed.

All traffic comes to my OTENET provided linksys router/ADSL modem which in turn is NATted to my LAN (just like any router). However i can bridge the connection directly to one PC and become NATless which yields the same results.

I will perform point to point testing and see from there.

What speed is your uplink doing on BT at the same time? It is possible that your uplink is saturated and this is causing a slowdown of your downlink. Bear in mind also that the link is shared, likely with a contention ratio in the region of 1:50, it is not a dedicated link.

There is no uplink, i am not uploading, downloading or doing anything else.
There is no network traffic,i'm booting in a clean environment with nothing but a single BT client.

To test my BT speed i connect to torrents with seeders that are able to provide ample bandwidth (openoffice, linux distributions)
In the past (month ago) i could get the maximum link speed of 50KB, with CYTA i could get 100KB (on 1Mbit ichoice) and so forth.

Try it for yourselves, try downloading openoffice BT and see what speed you get.
http://distribution.openoffice.org/p2p/