Mac Level Handoffs

[Anand S. Katti]

Mr. Craig,

Thanks a lot for your input.

I had the following setup.

HOSTAP--------DLINK-AP_DWL900+

Dlink is on a ethernet. And HOSTAP is also on the SAME LAN.
With the help from Mr.Patrick Tran, i got to know how to configure the machine
as bridge with hostap running in Managed mode.

Then I started Dlink also in AP mode 5 channels apart from hostap.
And i gave the same ssid to both the AP's.

The Above setup says that Both the AP's are in AP MODE.

Am I right ?

What should i do , if i use both AP's of DLINK.  If I just put both the
AP's in AP mode with same ssid, and plug them in Ethernet, will they work
? in giving persistent connection ?
Will the MAC level hand off's still takes place ?




>
> In your setup your FTP session will be persistent if both of your AP's
> are configured as bridges.
>
> It is ok for the hostap interface (wlan0) to be in Master mode as they
> will be acting as AP's and sending out beacons.  In fact I would
> recommend that you stick to Master mode in this setup.  The difference
> in channels will not matter either.  It may however increase your
> handoff latency slightly but FTP is not delay sensitive so you should
> be ok.  Typical handoff delays are 250 to 750 ms.
>
> In order to configure a your AP as a bridge simply use kernel bridging
> and put both wlan0 and eth0 into your newly created bridge group.
>
> All 802.11 handoffs are MAC layer handoffs.  Anything above L2 will be
> independent of hostap.
>
> I hope that this helps you out.
>
> Cheers,
>
> Craig
>
> Date: Sat, 3 Jan 2004 21:49:39 +0530 (IST)
> From: "Anand S. Katti" <askatti at ece.iisc.ernet.in>
> Subject: Mac Level Handoffs
> To: hostap at shmoo.com
> Message-ID: <Pine.BSF.4.58.0401032142020.55152 at ece.iisc.ernet.in>
> Content-Type: TEXT/PLAIN; charset=US-ASCII
>
> Hello All,
>
> I got one more query for HOTSPOT.
>
> I am setting up a HOTSPOT, but im understanding how things work at this
> point..
>
> hostap1----------------------hostap2
>
> hostap1:
> channel 1
> ssid=test
>
> hostap2
> channel 6
> ssid=test
>
> Both hostap are operating in AP mode.
>
> If I with a LAPTOP with an FTP session ON from hostap1 towards hostap2
> then will this session get disconnected ? or it will be on even on
> hostap2
> area? Will the connection be persistent?
>
> As requirement i'll seperate both AP's with 5 channels apart.
>
> Will the above setup work ? if not why ? I think essentially im asking
> whether above setup leads to MAC LEVEL HANDOFF's?
>
> Should the hostap2 be in repeater/BRIDGE mode ?
>
> Kindly showme the way.
> Anand S.Katti
>