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Re: code for Wireless Distribution system: msg#00011

Subject: Re: code for Wireless Distribution system
On Wed, 21 Jul 2004, manisha s wrote:

hello, thanks for your explaination. So we can implement WDS without any support from the firmware as done in HostAP code . HostAP code creates virtual interface for each of added wds link and it has to be added into bridge for correct operation . Am I right?

I think you are better off discussing HostAP features in the HostAP mailing list. As for Orinoco driver, it supports several related but not identical chipsets, only one of which supports Host AP mode (it's Intersil Prism). If master (AP) mode is ever added to Orinoco, it's much more likely to be support for tertiary firmware, which exists at least for two of the supported chipsets (Intersil Prism and Agere/Lucent Hermes, not sure about Symbol Spectrum24).

If you want working WDS, use HostAP or HermesAP. If you want WDS with tertiary firmware on Intersil Prism, use linux-wlan-ng, but you'll need some coding. Orinoco is not a good base for WDS work at the moment.

Here is one question . Suppose there are three APs A,B,C. A has established wds links with B and C. When A's associated client wants to talk with client of B then it will send packets to AP A. now how AP A will know to where to forward packet? Does AP A will send packets to both AP B and C using virtual interface or dircetly sends packet to AP B?

Again, you are better off asking it on the HostAP list. My understanding is that the forwarding is handled by the higher levels of the network stack. WDS packets are transmitted through separate network interfaces (e.g. wlan0wds0) corresponding to the established WDS links. There is exactly one peer AP address for every WDS interface. It's up to the bridging code to decide what packets to forward to which interface.

who makes decision to where to forward the packet ?bridge code or HostAP driver? Or does each AP exchange list of associated clients among themselves when making WDS links?

In case of HostAP, it's the bridge code (I think you can use even higher levels, then it will be the routing table). I believe it's also true for Intersil tertiary firmware. Although it's possible that some other hardware APs can handle WDS internally.

Pavel Roskin <proski-mXXj517/zsQ@xxxxxxxxxxxxxxxx> wrote:
Hello!

In the future, please write in plain text without HTML attachments.

Please don't top-post. It's hard to quote top-posted messages and you can easily miss some parts of the message you are replying to. Further HTML e-mails from you will go to /dev/null regardless of their contents.

--
Regards,
Pavel Roskin


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