Hi Jeff,
I have a similar comment with Dhruv. I am wondering how BGP-LS packages
together TE information. Wouldn't it require IGP-TE to give TE link-state
information to BGP-LS speaker, then BGP-LS packages them into a summary
TE-info? If this is the case, I am not sure how convergence time of BGP-LS can
improve that of IGP-TE? Please correct me if my understanding is not wrong.
Thanks,
Young
-Original Message-
From: Dhruv Dhody [mailto:dhruv.i...@gmail.com]
Sent: Thursday, July 17, 2014 11:35 AM
To: Jeff Tantsura
Cc: Leeyoung; pce@ietf.org; Greg Bernstein; Zhenghaomian
Subject: Re: [Pce] FW: New Version Notification for
draft-lee-pce-transporting-te-data-00.txt
Hi Jeff,
I agree with some of the operational benefits listed for BGP, but I was
wondering what is your thoughts w.r.t the convergence time for BGP-LS? Since
its dependent on IGP-TE, wouldn't it suffer from the same convergence delay?
Dhruv
On Thu, Jul 17, 2014 at 9:28 AM, Jeff Tantsura jeff.tants...@ericsson.com
wrote:
Hi,
While i find BGP-LS much more suitable for the distribution of TE data due to:
-BGP is well understood (operations/ troubleshooting, etc); sync, HA
issues had be solved -Policies framework is comprehensive -BGP infra
in most cases is already in place -RR construct provides hierarchy
-many more to mention
For the cases where BGP is not wanted (perceived as too complex/ doesn't
support data types needed)/ PCE infra has been deployed and practices well
understood it would make sense to use it.
From use cases prospective i think it only addresses (i), the rest could be
addressed similarly well by BGP, optical extensions are to come.
Regards,
Jeff
On Jul 2, 2014, at 2:51 PM, Leeyoung leeyo...@huawei.com wrote:
Hi,
We have just published a new PCE draft concerning alternative ways of
transporting TE data that may not depend on IGP-TE or BGP-LS.
The motivation for this work is a timely update of TE data directly from
nodes to PCE(s) to support scenarios like:
(i) networks that do not support IGP-TE or BGP-LS but want to implement PCE.
(ii) applications that require accurate and timely TE data that current
convergence time associated with flooding is not justified.
(iii) reduction of node OH processing of flooding mechanisms (esp.
optical transport networks where there are large amounts of traffic
data and constraints due to OTN/WSON/Flexi-grid, etc. Note that also
BGP-LS is not supported in optical transport networks today)
Your comment will always be appreciated.
Thanks,
Young (on behalf of other co-authors)
-Original Message-
From: internet-dra...@ietf.org [mailto:internet-dra...@ietf.org]
Sent: Wednesday, July 02, 2014 4:32 PM
To: Greg Bernstein; Dhruv Dhody; Greg Bernstein; Zhenghaomian; Dhruv
Dhody; Leeyoung; Leeyoung; Zhenghaomian
Subject: New Version Notification for
draft-lee-pce-transporting-te-data-00.txt
A new version of I-D, draft-lee-pce-transporting-te-data-00.txt
has been successfully submitted by Young Lee and posted to the IETF
repository.
Name:draft-lee-pce-transporting-te-data
Revision:00
Title:PCEP Extensions in Support of Transporting Traffic Engineering
Data
Document date:2014-07-02
Group:Individual Submission
Pages:20
URL:
http://www.ietf.org/internet-drafts/draft-lee-pce-transporting-te-data-00.txt
Status:
https://datatracker.ietf.org/doc/draft-lee-pce-transporting-te-data/
Htmlized:
http://tools.ietf.org/html/draft-lee-pce-transporting-te-data-00
Abstract:
In order to compute and provide optimal paths, Path Computation
Elements (PCEs) require an accurate and timely Traffic Engineering
Database (TED). Traditionally this TED has been obtained from a link
state routing protocol supporting traffic engineering extensions.
This document discusses possible alternatives to TED creation. This
document gives architectural alternatives for these enhancements and
their potential impacts on network nodes, routing protocols, and
PCE.
Please note that it may take a couple of minutes from the time of submission
until the htmlized version and diff are available at tools.ietf.org.
The IETF Secretariat
___
Pce mailing list
Pce@ietf.org
https://www.ietf.org/mailman/listinfo/pce
___
Pce mailing list
Pce@ietf.org
https://www.ietf.org/mailman/listinfo/pce
___
Pce mailing list
Pce@ietf.org
https://www.ietf.org/mailman/listinfo/pce
