VLC detected a weird WLAN problem

Hi, I have three devices, 1. Well pwr-734CE router adsl,wlan 'b'
11Mbps,100/10mbit lan (PC has 10mbit NIC). adsl you can forget,this
question considers the lan-wlan, 2. desktop PC with 10mbit NIC 3.
notebook with wlan b/g but because the router is 'b', therefore
noteboook works in 'b'-mode = 11Mbps Right...

I can stream with VideoLanClient *from* the notebook *to* PC, even a
DVD albeit choppy, but not the other way around which I prefer, why?
Severe choppynes and a wnetwork diag utility on the notebook states
that the reveive rate from the router is only 1-2Mbps! But if there's
no traffic it happily states 11Mbps!!!

Really beats me cause there's no send/receive-power cfg in the router
setup (which can be accessed via a web-interface), so I guess the
router somehow is outputting a lower send-signal to the notebook. Now
I'm thinking about it, the router is placed under a large and heavy
heating/radiator but that doesn't explain why I can stream *from* the
notebook *to* PC without bandwith problems...

Well ;-), it's up to you clever guys I'm out of answers right now...

Thanks for any advice!

Paul

Paul wrote:
> Hi, I have three devices, 1. Well pwr-734CE router adsl,wlan 'b'

Shucks, all google hits return info in Czech(?), so no help for me
there.

> 11Mbps,100/10mbit lan (PC has 10mbit NIC). adsl you can forget,this
> question considers the lan-wlan, 2. desktop PC with 10mbit NIC 3.
> notebook with wlan b/g but because the router is 'b', therefore
> noteboook works in 'b'-mode = 11Mbps Right...
>
> I can stream with VideoLanClient *from* the notebook *to* PC, even a
> DVD albeit choppy, but not the other way around which I prefer, why?
> Severe choppynes and a wnetwork diag utility on the notebook states
> that the reveive rate from the router is only 1-2Mbps! But if there's
> no traffic it happily states 11Mbps!!!

1-2 Mbps is the lowest/least common transmit mode shown on other WiFi
APs I've seen, so maybe...

a) there is some config that is making this "mode" active, but if other
packet paths (eg., through adsl to internet or your mentioned _from_
notebook to PC) work at expected rate, then this seems not the likely
cause.

b) the MTU of the PC is too large and packets are being fragmented when
transferring packets _to_ the notebook. Can you see how the interfaces
are configured for MTU and try lowering the MTU of the PC? You might
try pinging with smaller packets and compare times. $ man ping and look
at the -s and -M switches.

Also, googling shows some problems with PMTU and WiFi:
http://www.google.com/search?num=50&...u+mtu+fragment

> Really beats me cause there's no send/receive-power cfg in the router
> setup (which can be accessed via a web-interface), so I guess the
> router somehow is outputting a lower send-signal to the notebook. Now
> I'm thinking about it, the router is placed under a large and heavy
> heating/radiator but that doesn't explain why I can stream *from* the
> notebook *to* PC without bandwith problems...
>
> Well ;-), it's up to you clever guys I'm out of answers right now...

We may not be so clever ...

You might also try:
$ man wireless
and try some of those tools to see what's up.

If everything else works OK and the _only_ path that is troublesome is
the path _from_ PC _to_ notebook, I would look closely at the MTU
issue.

You can use ping with different packet sizes to find an "optimum" size
that just avoids fragmentation if that is the problem.

Only other thing I can think of would be some unknown vlc config
problem on the PC?

hth,
prg