A New Internet-Draft is available from the on-line Internet-Drafts
directories.
This draft is a work item of the Path Computation Element Working Group of the IETF.
Title : Preserving Topology Confidentiality in Inter-Domain Path Computation using a key based mechanism
Author(s) : R. Bradford, et al.
Filename : draft-ietf-pce-path-key-00.txt
Pages :
Date : 2007-5-2
Multiprotocol Label Switching (MPLS) Traffic Engineering (TE)
Label Switched Paths (LSPs) may be computed by Path Computation
Elements (PCEs). Where the TE LSP crosses multiple domains, such
as Autonomous Systems (ASs), the path may be computed by multiple
PCEs that cooperate, with each responsible for computing a segment
of the path. However, in some cases (e.g. when ASs are
administered by separate Service Providers), it would break
confidentiality rules for a PCE to supply a path segment to a PCE
in another domain, thus disclosing internal topology information.
This issue may be circumvented by returning a loose hop and by
invoking a new path computation from the domain boundary LSR
during TE LSP setup as the LSP enters the second domain, but this
technique has several issues including the problem of maintaining
path diversity.
This document defines a mechanism to hide the contents of a
segment of a path, called the Confidential Path Segment (CPS). The
CPS may be replaced by a path-key that can be conveyed in the PCE
Communication Protocol (PCEP) and signaled within in a Resource
Reservation Protocol (RSVP) explicit route object.
A URL for this Internet-Draft is:
http://www.ietf.org/internet-drafts/draft-ietf-pce-path-key-00.txt
To remove yourself from the I-D Announcement list, send a message to
i-d-announce-request@ietf.org with the word unsubscribe in the body of
the message.
You can also visit https://www1.ietf.org/mailman/listinfo/I-D-announce
to change your subscription settings.
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-pce-path-key-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-ietf-pce-path-key-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.
- <ftp://ftp.ietf.org/internet-drafts/draft-ietf-pce-path-key-00.txt>
-
_______________________________________________
I-D-Announce mailing list
I-D-Announce@ietf.org
https://www1.ietf.org/mailman/listinfo/i-d-announce
