R: [Voyage-linux] How to realize a Point to Point Connection

[Punky Tse]

Hi guys,
Same as managed mode, I think you can't bridge in Ad-hoc mode, am I right?

- Punky

Tommaso wrote:
>
> Thank you Andrew and Punky,
>
> I made the first links using one wrap in Master mode with 802.11g, in 
> this mode I can successfully connect to the AP with my laptop getting 
> up to 24 Mbps of ftp transfer rate.
>
> Then I have switched two Wraps in Ad-Hoc mode and 802.11a giving the 
> same SSID to both the Wrap and then I have tried a link within few 
> meters. I have connected a PC via eth0 to each Wrap, then I tried to 
> exchange IP traffic between the PCs. I can exchange IP traffic between 
> the two clients but at very low speed < 1 Mbps and with iwconfig 
> "saying" that the speed was 0 kbps.
>
> Maybe it’s an IP configuration problem.
>
> I use the following IP configuration for both the clients of the 
> bridge, this is the interfaces file for one client:
>
> /auto eth0/
>
> /iface eth0 inet static/
>
> / address 192.168.2.11/
>
> / netmask 255.255.255.0/
>
> / /
>
> /auto ath0/
>
> /iface ath0 inet static/
>
> / address 192.168.2.1/
>
> / netmask 255.255.255.0/
>
> / broadcast 192.168.2.255 /
>
> / up iwconfig ath0 essid VOYAGEM mode Ad-Hoc/
>
> / up nat.sh ath0 eth0 "192.168.2.0/24"/
>
> Then I have created a script file inserted in the if-up.d directory:
>
> /iwpriv ath0 mode 1
>
> iwconfig ath0 enc off
>
>
> #Bridge
> brctl addbr br0
> brctl addif br0 eth0
> brctl addif br0 ath0
> ifconfig br0 192.168.2.21 netmask 255.255.255.0
> ifconfig br0 up
> #End Bridge
> /
>
> The IP configuration was the following:
>
> Client1 Client2
>
> ath0: 192.168.2.1 ath0:192.168.2.2
>
> eht0: 192.168.2.11 eht0:192.168.2.12
>
> br0: 192.168.2.21 br0: 192.168.2.22
>
> PC: 192.168.2.31 PC: 192.168.2.32
>
> I haven’t used route rules because surprisingly the two PCs could see 
> each other without any route rule. It’s seems a little strange, I 
> haven’t fully understood why.
>
> Looking at the Andrew example I have understood that it’s not 
> necessary to assign an IP to the ath0 and eth0 when they are bridged, 
> is it correct?
>
> Thanks for the advices.
>
> Tommaso
>
> -----Messaggio originale-----
> Da: Punky Tse [mailto:punkytse at punknix.com]
> Inviato: lunedì 6 febbraio 2006 6.01
> A: Punky Tse
> Cc: Tommaso; voyage-linux at voyage.hk
> Oggetto: Re: [Voyage-linux] How to realize a Point to Point Connection
>
> Tommaso,
>
> I got your meaning wrong... I thought you are talking about long
>
> distance link.
>
> What mode (a/b/g) do you run master mode before and what mode for
>
> Ad-hoc? It sounds like you set 11b/g mode in master and then switch to
>
> 11a for ad-hoc? If using 11a, does the antenna support 5 GHz?
>
> The one of the difference betweeen pre1 nad pre3 is madwifi driver.
>
> pre1 uses madwifi-old while pre3 uses madwifi-ng (r1408). I had tested
>
> the madwifi-ng with Ad-hoc and it can even communicate to RM2 (prism54)
>
> with good throughput in 11b/g mode (e.g. downloading Apple movie
>
> trailer). If pre3 makes no difference then its not driver problem.
>
> - Punky
>
> Punky Tse wrote:
>
> > Tommaso,
>
> >
>
> > It is a tricky for tuning madwifi for long distance link. See:
>
> >
>
> > http://madwifi.org/wiki/UserDocs/LongDistance
>
> >
>
> > Punky
>
> >
>
> > Tommaso wrote:
>
> >>
>
> >> Hi to all,
>
> >>
>
> >> I’m actually using the 0.2pre1 version over a Wrap board with one CM9
>
> >> card. I have no problem having the ath0 interface working in Master
>
> >> Mode, I get a very good Access Point. Now I’m interested in testing
>
> >> the possibility to perform long (>5 Km) point to point links. I’m not
>
> >> a 802.11a-guru, so maybe I’m wrong, but I have put the ath interface
>
> >> of both clients in Ad-Hoc mode with the same SSID. I get the two
>
> >> clients connecting each other but with a very very low speed < 1Mps,
>
> >> the iwconfig reports 0 Kbps even if the received signal is bigger
>
> >> than -18 dBm (when the two clients are few meters away). I have
>
> >> changed the radio cards and the antenna, but it definitely seem a
>
> >> software problem.
>
> >>
>
> >> It’s a problem of the madwifi driver included in the 0.2pre1?
>
> >>
>
> >> Tomorrow I will update to the 0.2pre3 version, but I would to know if
>
> >> the Ad-Hoc mode is the best one for a point to point link; in fact,
>
> >> reading the madwifi-ng documentation I am a bit confused since you
>
> >> can use both the Ad-Hoc (iwconfig) mode and the WDS functionality
>
> >> putting one client in STA mode and the other one in AP mode.
>
> >>
>
> >> Thanks.
>
> >>
>
> >> Tommaso
>
> >>
>
> >> ------------------------------------------------------------------------
>
> >>
>
> >> _______________________________________________
>
> >> Voyage-linux mailing list
>
> >> Voyage-linux at list.voyage.hk
>
> >> http://list.voyage.hk/mailman/listinfo/voyage-linux
>
> >>
>
> >
>
> >
>
> -- 
>
> Regards,
>
> Punky
>
> P U N K N ! X . c o m
>
> Technology + Lifestyle
>
> (http://www.punknix.com)
>
> Voyage Linux
>
> (http://www.voyage.hk/software/voyage.html)
>


-- 
Regards,
Punky
P U N K N ! X . c o m
Technology + Lifestyle
(http://www.punknix.com)

Voyage Linux
(http://www.voyage.hk/software/voyage.html)