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RE: Question about L2VPN over MPLS

  • From: "McCallum, Robert" <robert.mccallum@thus.net>
  • Date: Wed, 24 Mar 2004 20:33:41 -0000
  • Resent-Date: Wed, 24 Mar 2004 16:18:51 -0500
  • To: "'Spice Sylvia'" <falsesylvia@yahoo.co.uk>, "McCallum, Robert" <robert.mccallum@thus.net>, Luis Manuel Antunes dos Santos <luis-m-a-santos@telecom.pt>, MPLS-ops Mailing List <mpls-ops@mplsrc.com>

Title: Message
no you asked for minimum buffering so that is CAR.
 
 

Robert McCallum
CCIE #8757 R&S
01415663448
07818002241

-----Original Message-----
From: Spice Sylvia [mailto:falsesylvia@yahoo.co.uk]
Sent: 24 March 2004 19:59
To: McCallum, Robert; Luis Manuel Antunes dos Santos; MPLS-ops Mailing List
Subject: RE: [MPLS-OPS]: Question about L2VPN over MPLS

i guess you meant "traffic shapping"?
Actually I meant "commited bit rate".

"McCallum, Robert" <robert.mccallum@thus.net> wrote:
>Though another interesting thing I would like to add to your >question is this:
>Forget the bit rate, let us make it as granualar as we can. >How do we do CBR so that we have "minimum buffering" at the >VPLS /L2VPN edge devices?

Use CAR??(rate-limiting/policing).


Robert McCallum
CCIE #8757 R&S
01415663448
07818002241
-----Original Message-----
From: Spice Sylvia [mailto:falsesylvia@yahoo.co.uk]
Sent: 23 March 2004 22:24
To: Luis Manuel Antunes dos Santos; MPLS-ops Mailing List
Subject: RE: [MPLS-OPS]: Question about L2VPN over MPLS


Just going a bit off topic here:

The minimum bit rate is a reflection of the ability of your multiplexer/demultiplexer to be able to able to give you the "exact" bits from the frame where you want to put your data.

Theoratically, I see no reason why there sh! ould be any limit,

Assume I use a E1 and I channelize it.

As long as all intermediate devices "know" that from the superframe structure, bit 1 has to go to A and bit 2 has to go to B and so on, it really does not matter.

I believe the current Digital Hierachies talk in terms of DS0 which is generally wrapped around to a speed of 64kbps.

Though another interesting thing I would like to add to your question is this:
Forget the bit rate, let us make it as granualar as we can. How do we do CBR so that we have "minimum buffering" at the VPLS /L2VPN edge devices?




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