Your Wrong, Multicast is NOT useless in the bit from ISP to end user, it works great infact.
"where are the multicast faithful
By Anonymous CowardPosted Friday 22nd August 2008 11:12 GMT
where are the multicast faithful when you need them most? If it's bandwidth from BBC to ISP that's the challenge, surely multicast can handle something simple that (it's just routers and cables, it can't be that complicated ;))?
Multicast is useless in the bit from ISP to end user, but that's another story, one which Mr Orlowski promised to write about much earlier in the year, but I'm still waiting patiently here..."
Anybody with a clue knows about the old MBONE knows it proved that your contention that the "Multicast is useless in the bit from ISP to end user" is WRONG.
that http://www.inuknetworks.com/uniTechnology.html proves it works, and it works well, IF THE ISPs turn on the already existing and powered Multicasting abilitys in every single ISP grade router and related kit today.
you must already know being so wise in these matters ;) that the IP Multicast, and IP Broadcast spec was written up before even the IP Uncast spec was fully evolved.
your not thinking longer term growth AC, when the call to Multicast to the end users is asked for, its not just about cost effective mass digital video streaming to and from the end users/customers, its about finally providing a framework thats existed in real industrial IP kit from day one the the end users/customers that companys and app writers can then retrofit into their existing apps and products to save everyones bandwidth.
muticasting near realtime video is only one option to start it off, Multcasting P2p in another, interactive Multicasting http Messageboards with whiteboards, massive multicasted VOIP conference calls and townhall meetings and so on.
this this from mearly turning back up the Multicasting abilitys of the existing router and related kit already in place, even the old MBONE prived you could setup a Multicasting point to multipoint tunnel to interested partys and stream your data whatever it was/is and send it once to multiple clients rather then the current unicast model of sending one copy to each/
hell even the BBC are still running the Multicast AVC trials and they asked the UKs ISPs to take part YEARS AGO, most of the ISPs failed to even talk to the BBC trial techs and see what benefits this old school MBONE Multicast could bring to all involved, and so the end users could even try these free BBC Multicast services even if they wanted to.
in hindsight, the BBC or indeed ANYONE running a WAN/WEB server could STILL setup a capable multicast tunnel and end users app and/or home installed Multicast cache/proxy and totally bypass the ISPs unwillingness to provide these Multicast abilitys directly to the end users/customers.
sure a tunneled Multicast point to multipoint service over IPV4/6 Uncast isnt as good as a direct Multicast IPv4/6 service, but it still gets the job done if the ludites that think ISP to end users is not viable today, IT IS VIABLE AND WERTH DOING ASAP to get the apps writers to start coding and using it.
hell heres just such a thing, http://www.cdt.luth.se/~peppar/progs/mTunnel/
written in java no less, and originally for use with dialup never mind broadband so dont come here implying its not viable or useful for BB app writters and end users world wide TODAY.
" multicast Tunnel - mTunnel
The mTunnel is an application that tunnels multicast packets over an unicast UDP channel. Several multicast streams can be sent over the same tunnel while the tunnel will still only use one port. This is useful if tunneling through a firewall.
The applications primary goal is to allow for easy tunneling of multicast over for instance a modem and/or an ISDN connection.
The mTunnel has a built in Web-server allowing for easy access to information about current tunnels. This server listens by default on port 9000 on the machine where started.
The mTunnel also listens on session announcements for easier tunneling of known sessions.
If you download and install this package please send me an email! :-) (email@example.com)
The latest public version is 0.3 released 980102.
Download: Windows UNIX
This version is NOT compatible with earlier versions of mTunnel!
I have also written two papers about this application: Paper1 - 1998 Paper2 - 1997
"Inuk has developed a platform for the distribution of broadcast quality TV and audio over IP-based networks using multicast delivery.
BTW as a side note, the new Docsis3 also mandates Multicast all the way to and from the end users home installed cable equipment.
"bronze" cert for docsis2.0b/3 banded downlstream multicast and silver cert for docsis2.0b/3 bonded upstream multicast, full DS3 cert having it all OC,thats were the real (ok so we cant trust the UK/Virgin Media based company to keep to the mandated spec and keep it turn on )enduser MultiCast choice will be.