The MPLS WG Archive

[Jim Sullivan <jsullivan@quarrytech.com>]

Jeremy, 


At 06:47 PM 04/26/2000 +1000, Jeremy Lawrence wrote:
>At 17:39 04/25/2000 -0700, Bora Akyol wrote:
>>I presume you are not familiar with how MPLS is actually used in
providers networks.
>
>I presume you are not familiar with how MPLS is actually used in providers'
>ATM networks. :)
>
>>FEC to LSP binding is almost historical now.
>
>That's arguably true in router-based networks, because of the
>predominance of TE as an application of MPLS in those networks.
>However, FEC to LSP binding is very much alive in ATM MPLS
>networks. 
I'm not sure I completely follow this thread. I make the assumption
that Bora believes all packets that do not get forwarded on 
TE LSPs can be efficiently forwarded as unlabeled packets. 
Is the point your raising that ATM-LSRs in general can not
be expected to forward unlabeled traffic efficiently ? 

Also, at least one MPLS-based VPN scheme relies on
>hop-by-hop routed MPLS (which may, in turn, be over-ridden by
>TE) in network cores of any type.
>
>Regards,
>
>Jeremy Larence
>
>
>
>
>>At 10:55 AM 4/25/00 +0530, Manish R. Shah. wrote:
>>
>>>Hi !!!
>>>
>>>Once the LSP's are created, the ingress router looks for the matching
FEC, and attaches
>>>a label corresponding to that FEC on to the data packet. Further
forwarding is done using
>>>the label switching.
>>>
>>>In an MPLS domain the LDP has already taken care of mapping
>>>FEC's with the incoming and outgoing Labels and efficient distribution
of Labels.
>>>
>>>Look at the following draft for furthur details.
draft-ietf-mpls-ldp-06.txt
>>>
>>>Cheers !!!
>>>
>>>Manish R. Shah.
>>>Senior Software Engineer,
>>>Future Software Pvt Ltd.
>>>480-481, Anna Salai, Nandanam
>>>Chennai 600035.
>>>Phone: +91-(44)-433-0550 Xten 294.
>>>
>>>
>>>-----Original Message-----
>>>From:   Neetu Gupta [SMTP:neetug@daewoo.dti.daewoo.co.kr]
>>>Sent:   Tuesday, April 25, 2000 10:28 AM
>>>To:     mpls@uu.net
>>>Subject:        Finding the Egress Point in the MPSL Domain for the
specific Destination
>>>
>>>Hello,
>>>     Suppose the LSPs are created among the Edge Routers in the MPLS
>>>Domain with specific class of services. Now the data packet comes at the
>>>Ingress LER, the IP Header contains the Destination Address and TOS
>>>byte.
>>>
>>>Since there are labels to Egress Router, to which Egress LER the data
>>>packet will be forwarded that will route to the Destination?
>>>
>>>I've heard of the draft that specifies how to treat LSP tunnel end node
>>>like LSP egress edge as next node for route calculations.
>>>Please give some reference.
>>>Neetu
>>
>>
>>
>>
>
>