Fiber Optic

Begin
On 2006-03-03, donnie wrote:
> I have Verizon fiber optic. When it was installed, I was only getting
> half of the advertized speed. I ran TCPOpitmizer on 3 w2k boxes to
> get the top speed. Of course, that won't work on FreeBSD.

I don't know what tcpoptimizer is or does, but I find its necessity...
interesting. I'd like to know why you need it in the first place.

On a more practical note, have you tried to run the verizon link with
FreeBSD and did you find you could only get half its advertised speed?


> There is no modem on Fiber, just a router. It's a DLink if that
> matters.

I don't know if that matters, but you could try and eliminate it from
the chain, if possible, and see if that improves matters.

Usually you tinker with this on the machines closest to the link, not
with the entire lan behind it. This is why you've only found references
for tuning PPPoE and the like -- for the usual setup FreeBSD is already
tuned fairly well. In fact, it sounds to me like your tcpoptimizer
isn't working around limitations in the link, but in the ``router''.
Confirming this, or not, is up to you.


--
j p d (at) d s b (dot) t u d e l f t (dot) n l .
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 >> Stay informed about: Fiber Optic 

You may find this interesting:

http://nitro.ucsc.edu/

There are several other such servers out there. It can provide
some good guidance on whether your connection is buffer-limited
(on the end host) or congestion constrained, etc.

You can also put together an instrumented Linux kernel on a box
somewhere and test this more locally.

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 >> Stay informed about: Fiber Optic 

>I don't know what tcpoptimizer is or does, but I find its necessity...
>interesting. I'd like to know why you need it in the first place.
>
>On a more practical note, have you tried to run the verizon link with
>FreeBSD and did you find you could only get half its advertised speed?
>
>
>> There is no modem on Fiber, just a router. It's a DLink if that
>> matters.
>
>I don't know if that matters, but you could try and eliminate it from
>the chain, if possible, and see if that improves matters.
>
>Usually you tinker with this on the machines closest to the link, not
>with the entire lan behind it. This is why you've only found references
>for tuning PPPoE and the like -- for the usual setup FreeBSD is already
>tuned fairly well. In fact, it sounds to me like your tcpoptimizer
>isn't working around limitations in the link, but in the ``router''.
>Confirming this, or not, is up to you.
#########################################
TCPOptimizer changed a lot of registry values in variious folders,
Tcpip. ICSharing, InternetSettings, NdisWAN and LanMan along w/ some
other settings. I'm not sure why it was needed but my guess is that
every machine can't automatically be configured to have the best
performance possible. It could be that it was working around the
router limitations but after all, it's verizon's router. They
supplied it so I'm not going to bother bypassing it even as a test. I
happened to see one of the installers in a pizzeria and told him what
I had to do. He made a note of the program and was going to use it on
his own connection. I even told Verizon, themselves.
I used bandwidthplace.com for the test. I'll install sudo and try
that and I'll look at that other site that was mentionend in one of
the responses.
 >> Stay informed about: Fiber Optic 

Begin
On 2006-03-03, donnie wrote:
[complete quote, attribution missing]
> #########################################

Don't do that.


[snip]
> It could be that it was working around the router limitations but
> after all, it's verizon's router. They supplied it so I'm not going to
> bother bypassing it even as a test.

Refusing to gather data in glaring absence of same means all you end
up doing is waving chickens and easter egging. That is not helpful
towards getting a handle on the the real nature of the problem. It is
inefficient enough to count as wasting time.


--
j p d (at) d s b (dot) t u d e l f t (dot) n l .
This message was originally posted on Usenet in plain text.
Any other representation, additions, or changes do not have my
consent and may be a violation of international copyright law.
 >> Stay informed about: Fiber Optic 

On 4 Mar 2006 10:51:08 GMT, jpd
wrote:

>Don't do that.
#################################
Don't do what? There were a few things listed. Which one?
 >> Stay informed about: Fiber Optic 

Ok, I found something on enabling polling which is supposed to tune
the nic in some way. One thing was compiling polling in the kernel
and the other was enabling it after the PC is booted. I tried that by
running ifconfig fxp0 polling and ifconfig fxp0 ether. I seem to
lose the DHCP address after I run that.
I also tried to enable it in the kernel permantely by using sysctl
kern.polling.enable=1 However, that gave me an error.
Any ideas?
 >> Stay informed about: Fiber Optic