From: NET HE (he_net@hotmail.com)
Date: Tue Sep 11 2007 - 23:08:13 ART
Moreover, the difference is, for shared tree, the source sends multicast
stream to the first multicast router, then the first multicast router sends
unicast encapsulating the multicast stream to RP, from which multicast
stream is transmitted down to the receivers; but for bidirectional shared
tree, there is no first multicast router, the source itself sends multicast
stream toward RP, and along the path to RP, the multicast stream is also
distributed to the receivers if there are.
For bidirectional shared tree configuration, not only the RP should be set
as bidirectional, but also the source.
Best Regards,
Net (Xin) He
>Return-Path: ccielab-owner@groupstudy.com
>
>Shared trees too; up to the RP from the source and down the tree from the
>RP to the destinations!!
>
>-- Richard
>
>-----Message d'origine-----
>De : nobody@groupstudy.com [mailto:nobody@groupstudy.com]
>Envoyi : Tuesday, September 11, 2007 3:46 PM
>@ : 'Cisco certification'
>Objet : Source and shared trees.
>
>Hello
>
>As far as i know PIM-DM builds only source path tree (S,G), PIM-SM builds
>shared path (*,G) tree and than switch to SPT , but
>what kind of tree build PIM bidir?
>
>_______________________________________________________________________
>Subscription information may be found at:
>http://www.groupstudy.com/list/CCIELab.html
>
>
>**********************************************************************
>Any opinions expressed in the email are those of the individual and not
>necessarily the company. This email and any files transmitted with it are
>confidential and solely for the use of the intended recipient. If you are
>not the intended recipient or the person responsible for delivering it to
>the intended recipient, be advised that you have received this email in
>error and that any dissemination, distribution, copying or use is strictly
>prohibited.
>
>If you have received this email in error, or if you are concerned with the
>content of this email please e-mail to: e-security.support@vanco.info
>
>The contents of an attachment to this e-mail may contain software viruses
>which could damage your own computer system. While the sender has taken
>every reasonable precaution to minimise this risk, we cannot accept
>liability for any damage which you sustain as a result of software viruses.
>You should carry out your own virus checks before opening any attachments
>to this e-mail.
>
>Vanco UK Ltd Registered in England No: 2296733 Registered Office: John
>Busch House, 277 London Road, Isleworth, Middlesex TW7 5AX
>
>Please consider the environment before printing this e-mail
>**********************************************************************
>
>_______________________________________________________________________
>Subscription information may be found at:
>http://www.groupstudy.com/list/CCIELab.html
This archive was generated by hypermail 2.1.4 : Sat Oct 06 2007 - 12:01:10 ART