Ok, I install DSL in people's houses and I need a definite answer pretty quickly here. Within the next day or two for sure since my next installation is on Wednesday I believe (I work for a small ISP).
Ok, first of all, our network is saturated. So the speeds aren't going to be quite what they should be and I understand that. We're working on adding another T1 to our system.
Anyways, here's the deal. With all my customers so far I've used the dslreports tweak test to set the RWIN through Dr. TCP. For a 1.5mbit downspeed connection, the RWIN is recommended to be 37960. That's what I've been setting everyone's RWIN to. That and I change the MTU to 1500. I leave everything else as default. So far that's helped make their really slow connection at least a little better. Usually between 450-550kbits/down. BUT, with the last customer, before I did anything, I ran a speed test and got 800kbits/down. Then I changed the RWIN to 37960 and the MTU to 1500 and behold.....they got busted back down to 500kbits/down. So then I do some quick research and see that some people like to set their RWIN at the maximum of 64240. So I tried that and their speed got even slower.
Then I come back to the office and start doing some tests. I sit down at a computer and I check it's RWIN before I mess with it and it's already at 64240. I do a speed test and I get 1mbit/down. Then I change the RWIN to 37960 and MTU to 1500. BAM, 500kbits/down. THEN, I change it back to 64240 and I get 300kbits/down. What the hell? I changed it back. What am I doing wrong here? All my speedtests are from the San Francisco Speakeasy server.
With my DSL connection at home (different ISP), all I did was use the tweak test and input the recommended RWIN, which is 10220 for my crappy connection, and then change the MTU to 1500 and I have a super stable and as fast as possible connection.
What am I missing here? At first I thought it was just our saturated network that was only allowing me to get around 500kbits/down. But now I'm not so sure after this customer had 800kbits/down and the computer in the office had 1mbit/down.
Explain everything to me in the simplest way possible. I really need to understand it. I feel crappy about not being able to give customers the best possible speeds.
I'm A DSL Tech. Need Definite Answer
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mnosteele52
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- Location: Chesapeake, VA
Ratman_84 wrote:Hmmm, I just asked the only guy currently in the office that knows anything and he says it's not PPPoE. He says "it's a standard DHCP connection". So.....yeah. Help me out guys. I'm just trying to learn more so my life becomes easier in the future.
Most likley it will pppoe since atm technology is very expensive to implament.
Now with the slow speeds you have to rember that all depends on how far you live from the central office some cases remote terminals can be installed to compsate the distance factor.
YOu also have line quailty ,an overheaad with dsl realisticly you are only suppose to get 80-85 percent of the advertised speed.
PPOE vs PPOA
PPPOe is over ethernet cheaper to implament.
PPPOA is based off tolken ring where the data is more realable since the cells are sent over by priorty like tolken ring where the tolken can be sent by priotorty.
Comptia a+ n+
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YeOldeStonecat
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- Location: Somewhere along the shoreline in New England
That's what I have, just a standard bridged DSL connection, no PPPoE, no username/password, no special software, no MAC filtering, just pure DHCP..pretty much ATM. MTU is good at 1500.Ratman_84 wrote:he says it's not PPPoE. He says "it's a standard DHCP connection". So.....yeah. .
How many clients though? Sounds as if things are growing, they'd need to add quite a bit more than just another T-1...I'd wager you guys would START with a DS3.
And try Speedguides TCP Optimizer!
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