Big Temporary Networks

Jay Ashworth jra at baylink.com
Sun Sep 16 01:55:41 UTC 2012


----- Original Message -----
> From: "William Herrin" <bill at herrin.us>

> On Sat, Sep 15, 2012 at 9:18 PM, Jay Ashworth <jra at baylink.com> wrote:
> > You're saying that *receiving* multicast streams over WLAN works
> > poorly?
> 
> I don't have any experience with it, but here's what Google told me:
> 
> http://www.wireless-nets.com/resources/tutorials/802.11_multicasting.html
> 
> "When any single wireless client associated with an access point has
> 802.11 power-save mode enabled, the access point buffers all multicast
> frames and sends them only after the next DTIM (Delivery Traffic
> Indication Message) beacon, which may be every one, two, or three
> beacons (referred to as the “DTIM interval”). [...] default 100
> millisecond beacon interval"

Thanks for doing my googling for me, Bill.  :-)

I'll do some more; I would sort've expect that might be something the
firmware in enterprise-class APs would handle better (where by better,
I mean "not permitting one client to manhandle the entire network" :-).

Cheers,
-- jra
-- 
Jay R. Ashworth                  Baylink                       jra at baylink.com
Designer                     The Things I Think                       RFC 2100
Ashworth & Associates     http://baylink.pitas.com         2000 Land Rover DII
St Petersburg FL USA               #natog                      +1 727 647 1274



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