[AG-TECH] its friday.........and we failed.....

[John Shalf]

We ran into the same problem with the AG robot (RAGE).  Most access 
points block multicast traffic.  In the case of the access points used 
at GGF, they crash in response to mcast.  :-)

The fix is pretty simple -- we just wrote a small bridge to connect the 
UDP stream from the mobile vic/rat into the mcast.  This is obviously 
obsoleted by the QuickBridge.

-john

On Thursday, October 30, 2003, at 06:54 PM, Richard Naylor wrote:

> folks
>
> being friday and close to "beer o'clock" I thought I'd share what 
> we've almost achieved this afternoon and also solicit some help.
>
> One of the projects here at CityLink is CafeNet (www.cafenet.co.nz). 
> If you know what wifi hot spots are, well Cafenet is a City wide hot 
> spot. yes we have hundreds of wireless access points around the city 
> with a central authentication/billing engine and linked with our fiber 
> network. You can roam with your ipaq, laptop etc or just stop (almost) 
> anywhere and get a decent net connection. Its based on 802.11g 54mbps 
> wireless. (and those nice Cisco wireless phones are cool - they work 
> well as you walk around the city. VoIP over WIFI)
>
> Well Carl, who I work with is the project engineer and uses VPN 
> technology to access the office from around the city. So - we decided 
> to install ATGK-2.1.2 onto his laptop. Since we don't have certs yet 
> we also installed the mbone tools (SDR, vic and rat) to test the 
> concept. but failed. Somewhere something is blocking the multi cast. 
> I'm about to go confess to the VPN/IT guys what we've been doing and 
> see if theres a fix.
>
> But think about it, we get 30-50mbps most places, so you could join in 
> an AG session from your local cafe, or your car while driving along 
> (wifi does hand over between APs nicely). We're also in the public 
> library, Parliament, National Library, national museum etc, so it 
> means an AG can be mobile. think about it.......
>
> Now where I need help is that of the 4 AG set ups, rat only seems to 
> work on 2. All machines are winXP and rat seems to start, but there is 
> no gui window (it appears in the task list). this is the same for both 
> the AG rat and the mbone tools rat. Any ideas ?
>
> tks - rich
>
>