RE: UDLR

From: wing_lam@jossynergy.com
Date: Wed Aug 13 2003 - 07:48:00 GMT-3

Thanks you guys, you answer is actually what I want.

Alec: I also guess a simplex CAT5 can do this while the ethernet can be
"up", I will try this out. Have you try this before?

Marcus: Yeah, you mean artificially deny it, I will take a try.

Thanks a lot!
BBD (Big Black Dog)

                                                                                                                                       
                      "Marcus Jensen"
                      <marcus@pobox.com To: <wing_lam@jossynergy.com>, "'Howard C. Berkowitz'" <hcb@gettcomm.com>
> cc: <ccielab@groupstudy.com>
                      Sent by: Subject: RE: UDLR
                      nobody@groupstudy
                      .com
                                                                                                                                       
                                                                                                                                       
                      08/13/2003 03:28
                      PM
                      Please respond to
                      "Marcus Jensen"
                                                                                                                                       
                                                                                                                                       

Use a multicast scenario. Set up an ethernet connection between two routers
and deny all ip and multicast outward at one side.

Then look up multicast UDLR implementation and set up another normal
ethernet connection between the routers and try to establish proper
multicast flows without the rpf lookup restrictions of the router that
can't
send pim and join packets out your simulated sattelite link. You will find
a
nice topology to copy under the UDLR multicast examples.

Marcus

-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com]On Behalf Of
wing_lam@jossynergy.com
Sent: Wednesday, August 13, 2003 1:46 PM
To: Howard C. Berkowitz
Cc: ccielab@groupstudy.com
Subject: Re: UDLR

Hi Howard,

I just wanna study any feature that the router can be configured, as this
seems a valid topic in CCIE LAB exam.

Yeah, I would like to similate the situation with unidirectional link, how
can I setup the serial port?

You're right, I have a return path and I am setup to test the multicast
traffic.

I have read though the following link already and would like to have a test
on it. But I don't know how to similate a uni-directional link using simply
Serial, or Ethernet etc.

Any idea?

Thx a lot!
BBD (Big Black Dog)

                      "Howard C.
                      Berkowitz" To:
ccielab@groupstudy.com
                      <hcb@gettcomm.com cc:
> Subject: Re: UDLR
                      Sent by:
                      nobody@groupstudy
                      .com

                      08/13/2003 12:38
                      AM
                      Please respond to
                      "Howard C.
                      Berkowitz"

At 10:36 PM +0800 8/12/03, wing_lam@jossynergy.com wrote:
>Hi group,
>
>Can any body suggest me method to run UDLR? I mean how can I find a
>interface similar the situation like one way satellite?
>

Be sure you understand what ULDR does. While it's called
"Unidirectional Link Routing," for data applications, it really tends
to need a reverse channel, often slow, for acknowledgements and the
like. The original intention for ULDR in the IETF was for video
broadcasts and the like, which are truly one-way applications, and
often multicast. I'd strongly recommend reading the IETF documents
and even getting on the mailing list/reading the archives.

Most of the development is in France and Japan.

What is the problem you are trying to solve?

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