Cell Relay Archive

[hossam al din <microtec@gega.net>]

> LUNI2.0 provides the services of multicasting by introducing the
> concept
> of Selective multicast servers (SMS). Each SMS represents one or more
> multicast groups ( i.e. multicast mac addresses ). Every LE Client
> that
> wishes to be able to receive the multicast traffic registers with a
> Lan
> Emulation Server the multicast mac address in one of its registration
> requests. This registration prompts a SMS to add the LEC as a party to
>
> its outgoing P2MP connection ( Multicast Forward VCC ). All those LECs
>
> who wish to send data to this multicast group resolve the multicast
> mac
> address by issuing LE_ARP to the Lan Emulation Server. Once resolved,
> the clients establish a p2p multicast send VCC to a SMS. The data sent
>
> on Multicast Send VCC gets forwarded to all LECs who have registered
> as
> listeners in the multicast group through Multicast Forward VCC. This
> way
> the multicast traffic is segregated from broadcast traffic.
>
> In the event of SMS being not present, the only way to distribute
> multicast traffic is to have it broadcasted through BUS and let the
> end
> systems decide what to do with the data packet received.
>
> - Regards
>   Bharat
>
> --
> ___________________________________________________________________
> Bharat Bhushan Kaul                 Trillium Digital Systems Inc.
>                                     Los Angeles, California - 90025
> mailto:bharat@trillium.com          Phone: +1 310 442
> 9222
> http://www.trillium.com/            Fax  : +1 310 442 1162

Hi Bharat Bhushan Kaul'
 Actually ,After Reading ATM Forum LUNI 2 specs, i think that The
selective Multicast server you
have mentioned  is really a nother BUS in the same ELAN and this is what
is called LAN Network-Network Interface (LNNI).
the LEC setup the default MulticastSend VCC to the primary  BUS and the
BUS in turn setup
the MulticastForward VCC to the LEC.
the LEC can setup additonal MulticastSend VCC to other BUSs by the same
way the default multicastsend VCC is setup.

when the LEC want to multicast , it send on selectiveMulticastSend VCC
and if not found it
keep sending on the defualt MulticastSend VCC.

In MPOA, the LEC  make use Of the Multicast Adress Resolution Server
(MARS) and the MCS (Multicast Server) (this Model is introduced in RFC
2022).
or obviously the LEC can etablish pt2mpt directly to destination(this is
called VC Mesh);

thanks

Hossam Aldin
AlAzhar University
Faculty of Engineering
Computers & Systems Department
Tel. +202-4186162
Fax. +202-4186162
E-Mail: microtec@gega.net