Re: ping (DUP!) in FreeBSD 5.4

From: Jim Thompson <jim_at_netgate.com>
Date: Thu, 23 Feb 2006 22:39:48 -1000
Dmitry Pryanishnikov wrote:

>
> Hello!
>
> On Fri, 24 Feb 2006, Nik wrote:
>
>> This is happen when I setup point to point connection using wireless
>> with
>> realtek network card (rl0). I wondering if this situation will effect my
>
>
>  What kind of wireless hardware do you use? 

he said 'ralink'

> I have seen a lot of duplicates
> with cheap wireless adapters made by Planet or D-Link. It has nothing to
> do with your NIC, duplicates are originated by wireless.

this statement makes no sense.  It translates to "it has nothing to do
with your nice, duplicates are originated by <your nic>".

Yes, you can get dups if the transmitter doesn't receive an ACK.   Any
number of things can cause this.

> Yes, duplicates
> can lower network throughput by using the additional bandwidth. You can
> try to avoid them by changing the antenna orientation.

you can also try:

better coax
dryer coax
installing an antenna period (you'd be suprised at what people try to
get away with)
moving the devices closer together
lowering the modulation rate
etc
Received on Fri Feb 24 2006 - 07:39:52 UTC

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