Wireless Routers and Cable Modems - Speed differences

Wireless Routers and Cable Modems - Speed differences
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Wireless Routers and Cable Modems - Speed differences naftali 02-22-2005
Posted by naftali on February 22, 2005, 8:31 am
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Hi: I have a Motorola Surfboard Cable Modem and a NetGear MR814
Wireless Router (802.11b) I also use a Compaq Laptop with built in
wireless (802.11g)

When my computer is connected directly to the modem, I get around
650kb/sec download, but through the router only around 200

Any idea what might be the issue here? I am only 20 feet from the
router and I tried it from 2 feet away.

Is it some kind of incompatibility between the g and b protocols?
I upgraded the firmware on the router.
I also tried to see what the download is at a hot spot, but the speeds
there are slow, either through too many users or capping.
I also tried to see what the downloads are at quiet times, say 4:30AM
with no improvement.

Thanks,



NMFall 20%
Posted by Dave C. on February 22, 2005, 7:04 pm
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> Hi: I have a Motorola Surfboard Cable Modem and a NetGear MR814
> Wireless Router (802.11b) I also use a Compaq Laptop with built in
> wireless (802.11g)
>
> When my computer is connected directly to the modem, I get around
> 650kb/sec download, but through the router only around 200
>
> Any idea what might be the issue here? I am only 20 feet from the
> router and I tried it from 2 feet away.
>
> Is it some kind of incompatibility between the g and b protocols?
> I upgraded the firmware on the router.
> I also tried to see what the download is at a hot spot, but the speeds
> there are slow, either through too many users or capping.
> I also tried to see what the downloads are at quiet times, say 4:30AM
> with no improvement.
>
> Thanks,
>

OK, if 802.11b is the connection speed, then your theoretical maximum
download speed would be just over 100kb/second. Most 802.11g equipment is
backward-compatible with 802.11b equipment. So there is probably no
incompatibility issue here. To me, it looks like everything is working
great, in fact. -Dave




Posted by Bill M. on February 22, 2005, 9:27 pm
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>
>> Hi: I have a Motorola Surfboard Cable Modem and a NetGear MR814
>> Wireless Router (802.11b) I also use a Compaq Laptop with built in
>> wireless (802.11g)
>>
>> When my computer is connected directly to the modem, I get around
>> 650kb/sec download, but through the router only around 200
>>
>> Any idea what might be the issue here? I am only 20 feet from the
>> router and I tried it from 2 feet away.
>>
>> Is it some kind of incompatibility between the g and b protocols?
>> I upgraded the firmware on the router.
>> I also tried to see what the download is at a hot spot, but the speeds
>> there are slow, either through too many users or capping.
>> I also tried to see what the downloads are at quiet times, say 4:30AM
>> with no improvement.
>>
>> Thanks,
>>
>
>OK, if 802.11b is the connection speed, then your theoretical maximum
>download speed would be just over 100kb/second.

You probably mean 100 KB/second. Big difference between bits and
bytes.

>Most 802.11g equipment is
>backward-compatible with 802.11b equipment. So there is probably no
>incompatibility issue here. To me, it looks like everything is working
>great, in fact. -Dave

Except for the fact that throughput apparently drops by 2/3, from
650-something to 200-something, when the router is in the data path.
Something seems to be up with that router. MTU setting? Firmware?

--
Bill


Posted by Warren on February 22, 2005, 8:28 pm
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Bill M. wrote:
> Something seems to be up with that router. MTU setting? Firmware?


Non-duplex connection, perhaps?

--
Warren H.

==========
Disclaimer: My views reflect those of myself, and not my
employer, my friends, nor (as she often tells me) my wife.
Any resemblance to the views of anybody living or dead is
coincidental. No animals were hurt in the writing of this
response -- unless you count my dog who desperately wants
to go outside now.
Find the best books about gardening in the Pacific NW:
http://www.holzemville.com/mall/nwgarden/index.html





Posted by Henry on February 22, 2005, 9:31 pm
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> > Hi: I have a Motorola Surfboard Cable Modem and a NetGear MR814
> > Wireless Router (802.11b) I also use a Compaq Laptop with built in
> > wireless (802.11g)
> >
> > When my computer is connected directly to the modem, I get around
> > 650kb/sec download, but through the router only around 200
> >
> > Any idea what might be the issue here?

>
> OK, if 802.11b is the connection speed, then your theoretical maximum
> download speed would be just over 100kb/second. Most 802.11g equipment is
> backward-compatible with 802.11b equipment. So there is probably no
> incompatibility issue here. To me, it looks like everything is working
> great, in fact. -Dave

Erm..."It does not compute."

Your theoretical maximum says 100kb/s for 11b. Remember chains and
weakest links--or, I suppose 'channels and bottlenecks' would be better?
He's using an 11b router, so your 100kb/s theoretical should apply to
him. But he's actually getting 200kb/s! Howzat?

cheers,

Henry


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