TCP Pause

Products PMP
1

I setup a MySpeed Server on our local network (Still in testing), we are using 900mhz, and my setup is SM -> AP -> BHS -> BHM -> MySpeed Server -> Internet.

I am seeing TCP pause times around 570ms from my computer connected to the SM to the server, it should all be within our local network, however when I do a test from SM to AP and from BHS to BHM both show 100% on the link capacity test, the SM to AP is set at 50%, so it shows the downlink at 2.2mb but the speed test is showing 1.2mb.

Is this normal? I hope not, or do I have a bad switch / router in place somewhere? I am going to try and do some more testing today and start taking switches and routers out of play and also try a diffrent server to see if that makes a diffrence, but I would like to get your opinion on if you have ever seem anything lik this. My ping times are currently average around 15ms although I think this is even high considering the distance is under a mile round trip. Here is a ping graph from a computer connected to the SM hitting the server. Thanks for the help.

Pinging 192.168.1.102 with 32 bytes of data:

Reply from 192.168.1.102: bytes=32 time=12ms TTL=64
Reply from 192.168.1.102: bytes=32 time=14ms TTL=64
Reply from 192.168.1.102: bytes=32 time=9ms TTL=64
Reply from 192.168.1.102: bytes=32 time=9ms TTL=64
Reply from 192.168.1.102: bytes=32 time=14ms TTL=64
Reply from 192.168.1.102: bytes=32 time=19ms TTL=64
Reply from 192.168.1.102: bytes=32 time=14ms TTL=64
Reply from 192.168.1.102: bytes=32 time=14ms TTL=64
Reply from 192.168.1.102: bytes=32 time=19ms TTL=64
Reply from 192.168.1.102: bytes=32 time=14ms TTL=64
Reply from 192.168.1.102: bytes=32 time=19ms TTL=64
Reply from 192.168.1.102: bytes=32 time=19ms TTL=64
Reply from 192.168.1.102: bytes=32 time=14ms TTL=64
Reply from 192.168.1.102: bytes=32 time=14ms TTL=64
Reply from 192.168.1.102: bytes=32 time=14ms TTL=64
Reply from 192.168.1.102: bytes=32 time=19ms TTL=64

Ping statistics for 192.168.1.102:
Packets: Sent = 16, Received = 16, Lost = 0 (0% loss),
Approximate round trip times in milli-seconds:
Minimum = 9ms, Maximum = 19ms, Average = 14ms

2

I have done some more testing as this is driving me crazy, I have linked it to the sustained vs. burst speed testings on the SM. I had changed them from the defaults to be 1.5mb up and down and left the burst alone at 500000kbs, this apparently caused the delay.

What do you guys do for service as far as sustained and burst for your diffrent levels of service. If you offer 256, 512 and 1.0mb what do you set your values to in order to see the best performance?

Thanks,
Ben

3

I have noticed something similar in our network ever since we set the burst to 0. Mostly with gamers and people who do video, the video pauses for about 1 seconds every 5 or so seconds. Is like a clock, continuously pausing thru the duration of the video

4

Does anyone have any recommendations for settings? What works for you guys that have existing successful networks?

Thanks,
Ben

5

if the sm is in 2X try forcing to 1X. I’ve seen this when the radio is right on the 1X threshold and toglles back and forth between 1X and 2X.

6

I can give that a try, right now I am getting 99% reliability if I let the radio run full bore on 2X and I have the AP set at 75% downlink, so basically I get a very consistent 3.5MBps down and 1.11MBps up with almost no pause. I just need to play with the settings to be able to limit that bandwidth so I can sell cheaper plans too.

Thanks,
Ben

7

Set you SUSTAINED, BURST and CIR to the same amounts.

ie.
Sustained down =1024
Sustained up = 1024
Burst down = 1024
Burst up = 1024
Low Priority downlink CIR = 1024
Low Priority Uplink CIR = 1024

See what that does. If you get the proper speeds then try different rates:

ie.
Sustained down = 3072
Sustained up = 1500
Burst down = 3072
Burst up = 1500
Low Priority downlink CIR = 3072
Low Priority Uplink CIR = 1500