Inter-Domain Multicast Routing (idmr)

Alex Zinin | 12 Apr 2002 02:49

Request for review of draft-wu-rgmp-01.txt

Hello,

 The IESG received a request to publish draft-wu-rgmp-01.txt
 as an Informational RFC. While considering this request,
 it was identified that the subject of the draft may overlap
 with some work done by the IDMR WG.

 The ADs would like to ask the WG to review this I-D and
 provide comments on it by April 26th. Following are the types
 of feedback we're looking for:

   1. Technical quality and usefulness of this work.

   2. Whether the WG considers this I-D an end-run
      around the WG's efforts.

   3. Whether this document should be published as an
      Informational RFC.

 Please note that the draft describes a proprietary protocol,
 which has been implemented and deployed, and the authors are
 interested in keeping the protocol operation as described.

 Also, be advised that we have been notified of intellectual
 property rights claimed in regard to some or all of
 the specification contained in this document. The authors
 have been asked to follow the procedure and file an official
 IPR disclosure with the IETF executive director.

Thank you

(Continue reading)

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yftu | 18 Apr 2002 10:37

dvmrp in switch

Hi,all
  I have two questions about dmvrp when developing
dvmrp in switch.

<1>¡¢when a multicast trffic packet received from
     upstream interface, if another port which
     is in the same VLAN of receiving port and
     it has a host wanting to recieve that 
     multicast traffic packet, then how can
     switch forward the multicast traffic packet
     from the receiving port to the port which
     has a receiving host?
<2>¡¢If one port in the non-designated forwarding
     interface has a group receiving host, then 
     how can switch forward the multicast traffic
     packet from designated forwarder to the the
     port in the non-designated forwarding interface?

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headers

Bill Fenner | 22 Apr 2002 21:58

Re: Request for review of draft-wu-rgmp-01.txt


[WG participant hat firmly planted on head]

When I first heard of RGMP, I wondered why IEEE 802.1p's GMRP
did not suffice.  RGMP does use IP multicast addresses, instead
of ethernet multicast addresses, but there may be little benefit
from that because routers aren't allowed to send LEAVE messages
for groups that overlap with other groups that the router does
want traffic from.

GMRP also handles multiple switches gracefully, etc, something
that's not completely handled in RGMP.

I'd like to see the spec discuss why GMRP is not sufficient and
why RGMP is better.

On the topic of the spec itself, I think that it should admit that
it's PIM-specific, instead of saying that it is general and then
saying that you could maybe use non-PIM mechanisms if you felt like
it.  It doesn't even suggest using multicast router discovery for
discovering multicast routers, instead saying to use PIM protocol
messages.

I think it's a shame that RGMP continues the 224.0.0/24 problem, but
since we're not allowed to suggest protocol changes, such is life.
Hardwiring 224.0.1.39 and .40 is also unfortunate; that's a Cisco
protocol that a given network might not be running.

RGMP happened to pick IGMP type numbers out of the space that's
reserved for experimental usage.  I guess that's OK, except that

(Continue reading)

headers

Pavlin Radoslavov | 27 Apr 2002 02:59

Re: Request for review of draft-wu-rgmp-01.txt

(CC to magma <at> ietf.org as well because some comments have been sent
to that list instead)

>  The IESG received a request to publish draft-wu-rgmp-01.txt
>  as an Informational RFC. While considering this request,
>  it was identified that the subject of the draft may overlap
>  with some work done by the IDMR WG.
> 
>  The ADs would like to ask the WG to review this I-D and
>  provide comments on it by April 26th. Following are the types
>  of feedback we're looking for:
>  
>    1. Technical quality and usefulness of this work.
> 
>    2. Whether the WG considers this I-D an end-run
>       around the WG's efforts.
> 
>    3. Whether this document should be published as an
>       Informational RFC.
> 
>  Please note that the draft describes a proprietary protocol,
>  which has been implemented and deployed, and the authors are
>  interested in keeping the protocol operation as described.
> 
>  Also, be advised that we have been notified of intellectual
>  property rights claimed in regard to some or all of
>  the specification contained in this document. The authors
>  have been asked to follow the procedure and file an official
>  IPR disclosure with the IETF executive director.

(Continue reading)

headers

Internet-Drafts | 29 Apr 2002 13:53

I-D ACTION:draft-ietf-idmr-igmp-v3-10.txt,.ps

A New Internet-Draft is available from the on-line Internet-Drafts directories.
This draft is a work item of the Inter-Domain Multicast Routing Working Group of the IETF.

Title : Internet Group Management Protocol, Version 3
Author(s) : B. Cain, S. Deering, B. Fenner,
I. Kouvelas, A. Thyagarajan
Filename : draft-ietf-idmr-igmp-v3-10.txt,.ps
Pages : 52
Date : 26-Apr-02

This document specifies Version 3 of the Internet Group Management
Protocol, IGMPv3. IGMP is the protocol used by IPv4 systems to report
their IP multicast group memberships to neighboring multicast routers.
Version 3 of IGMP adds support for 'source filtering', that is, the
ability for a system to report interest in receiving packets *only* from
specific source addresses, or from *all but* specific source addresses,
sent to a particular multicast address. That information may be used by
multicast routing protocols to avoid delivering multicast packets from
specific sources to networks where there are no interested receivers.

A URL for this Internet-Draft is:
http://www.ietf.org/internet-drafts/draft-ietf-idmr-igmp-v3-10.txt

To remove yourself from the IETF Announcement list, send a message to
ietf-announce-request with the word unsubscribe in the body of the message.

Internet-Drafts are also available by anonymous FTP. Login with the username
"anonymous" and a password of your e-mail address. After logging in,
type "cd internet-drafts" and then
"get draft-ietf-idmr-igmp-v3-10.txt".

(Continue reading)

headers

Reddy Raja Reddy | 1 May 2002 10:11

Joining in Multicast Group


Sir,

         I want to join in a Multicast Group, say 
MY_GROUP. But there is only one unicast router in my
subnet. How can i submit IGMP join membership report
to a multicast router ?

P.Raja Reddy.

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headers

Reddy Raja Reddy | 1 May 2002 12:33

Joining in Multicast Group

 Sir,

          I want to join in a Multicast Group, say 
 MY_GROUP. But there is only one unicast router in my
 subnet. How can i submit IGMP join membership report
 to a multicast router ?

 
 P.Raja Reddy.

__________________________________________________
Do You Yahoo!?
Yahoo! Health - your guide to health and wellness
http://health.yahoo.com

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