The MPLS WG Archive[Date Prev][Date Next][Thread Prev][Thread Next] [Date Index][Thread Index][Author Index][Subject Index] I-D ACTION:draft-minei-mpls-ldp-external-00.txt (fwd)
so what is wrong with using the IBGP, and 3 label MPLS stack , while leaving LDP out of the routing business ? Luca Ina Minei wrote: > Please see answers innline, marked ###. > > Thank you, > > Ina > >On Mon, 10 Nov 2003, jason rusmisel wrote: > > > >>A question for you: >> >>If I understand correctly, the motivation for this draft is to allow LDP >>to be the single mechanism to distribute reachability rather than >>counting on a 2547bis-like mechanism. >> >> > >### The motivation for this draft is to allow establishment of LDP >signaled LSPs without having to inject routes for them in the IGP. >The 2547bit scenario is an example of using the proposed extension. > > > >>The overall approach of carrying the External FEC in the FEC TLV >>guarantees that these label mappings will not be propagated in a network >>of mixed LDP implementations. Have you considered this situation? >> >> >> > >### In a mixed network, LSPs for external FECs will be established only >through nodes that support this functionality, thus ensuring consistent >establishment of the LSPs. Note that since we don't have routing table >entries for these FECs, nodes not supporting the extension would not >propagate mappings for them anyway. > > > Jason Rusmisel. > > >>Ina Minei wrote: >> >> >> >>> This document describes a mechanism that allows the creation of LDP >>>signaled LSPs for prefixes which are not present in the routing table. >>> >>> Comments welcome, >>> >>> Thank you, >>> >>> Ina Minei >>> >>>---------- Forwarded message ---------- >>>Date: 7 Oct 03 15:00:15 GMT >>>From: Internet-Drafts@ietf.org >>>To: IETF-Announce: ; >>>Newsgroups: jnx.ext.ietf.announce >>>Subject: I-D ACTION:draft-minei-mpls-ldp-external-00.txt >>> >>>A New Internet-Draft is available from the on-line Internet-Drafts directories. >>> >>> >>> Title : LDP signaled LSPs for external prefixes >>> Author(s) : L. Fang, et. al. >>> Filename : draft-minei-mpls-ldp-external-00.txt >>> Pages : 6 >>> Date : 2003-10-7 >>> >>>In order to create forwarding state for a FEC received from a downstream >>>LSR, LDP requires the presence of a matching entry in the routing table. >>>This document describes a mechanism that allows the creation of LDP >>>signaled LSPs for prefixes which are not present in the routing table. >>>This draft is applicable to address prefix FECs and host FECs associated >>>with either IPv4 or IPv6 prefixes. >>> >>>A URL for this Internet-Draft is: >>>http://www.ietf.org/internet-drafts/draft-minei-mpls-ldp-external-00.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-minei-mpls-ldp-external-00.txt". >>> >>>A list of Internet-Drafts directories can be found in >>>http://www.ietf.org/shadow.html >>>or ftp://ftp.ietf.org/ietf/1shadow-sites.txt >>> >>> >>>Internet-Drafts can also be obtained by e-mail. >>> >>>Send a message to: >>> mailserv@ietf.org. >>>In the body type: >>> "FILE /internet-drafts/draft-minei-mpls-ldp-external-00.txt". >>> >>>NOTE: The mail server at ietf.org can return the document in >>> MIME-encoded form by using the "mpack" utility. To use this >>> feature, insert the command "ENCODING mime" before the "FILE" >>> command. To decode the response(s), you will need "munpack" or >>> a MIME-compliant mail reader. Different MIME-compliant mail readers >>> exhibit different behavior, especially when dealing with >>> "multipart" MIME messages (i.e. documents which have been split >>> up into multiple messages), so check your local documentation on >>> how to manipulate these messages. >>> >>> >>>Below is the data which will enable a MIME compliant mail reader >>>implementation to automatically retrieve the ASCII version of the >>>Internet-Draft. >>> >>> >>> > > >
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