Kingsley
02-22-2009, 01:07 AM
Hey there.
We have quite a bit of Ubiquiti products in our WISP network here in New Zealand.
We have Gateworks router boards with SR2 and SR5 cards. 5s for running back hauls and 2s for the 2.4 clients. All clients use NS2 nano.
We find we get good bandwidth etc and mostly works fine. Until some of the clients open a torrent program such as u torrent and start downloading. This opening 100s of tcp ports/connections on the AP's. This then creates very very high pings 1-3 seconds to the clients and packet loss, normally wouldn't be more than 50ms! But yet the other interfaces (back hauls) aren't affected. All clients running of that SR2 card get affected. We have had upto 1000 connections, and found it starts affecting pings etc at around 500 or above. With this number of connections throughput is still only 1-2MBs.
Has anyone experienced this? Or can help to fix this?
Is this a limitation of the cards? or router board?
The router board is displaying 4% cpu and has plenty of memory free.
We have managed to limit the tcp connections in the nanos with ip tables but this isn't fixing the problem more masking the problem. It still accrues from time to time and will get worse.
Any info or discussion would be appreciated I really hope there is a cure for this.
Regards,
Kingsley
We have quite a bit of Ubiquiti products in our WISP network here in New Zealand.
We have Gateworks router boards with SR2 and SR5 cards. 5s for running back hauls and 2s for the 2.4 clients. All clients use NS2 nano.
We find we get good bandwidth etc and mostly works fine. Until some of the clients open a torrent program such as u torrent and start downloading. This opening 100s of tcp ports/connections on the AP's. This then creates very very high pings 1-3 seconds to the clients and packet loss, normally wouldn't be more than 50ms! But yet the other interfaces (back hauls) aren't affected. All clients running of that SR2 card get affected. We have had upto 1000 connections, and found it starts affecting pings etc at around 500 or above. With this number of connections throughput is still only 1-2MBs.
Has anyone experienced this? Or can help to fix this?
Is this a limitation of the cards? or router board?
The router board is displaying 4% cpu and has plenty of memory free.
We have managed to limit the tcp connections in the nanos with ip tables but this isn't fixing the problem more masking the problem. It still accrues from time to time and will get worse.
Any info or discussion would be appreciated I really hope there is a cure for this.
Regards,
Kingsley
