Re: [Pce] FW: New Version Notification for draft-lee-pce-transporting-te-data-00.txt
Leeyoung <leeyoung@huawei.com> Thu, 17 July 2014 16:42 UTC
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From: Leeyoung <leeyoung@huawei.com>
To: Dhruv Dhody <dhruv.ietf@gmail.com>, Jeff Tantsura <jeff.tantsura@ericsson.com>
Thread-Topic: [Pce] FW: New Version Notification for draft-lee-pce-transporting-te-data-00.txt
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Date: Thu, 17 Jul 2014 16:42:14 +0000
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Cc: "pce@ietf.org" <pce@ietf.org>, Greg Bernstein <gregb@grotto-networking.com>, Zhenghaomian <zhenghaomian@huawei.com>
Subject: Re: [Pce] FW: New Version Notification for draft-lee-pce-transporting-te-data-00.txt
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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.ietf@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.tantsura@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" <leeyoung@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-drafts@ietf.org [mailto:internet-drafts@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] FW: New Version Notification for draft-lee-… Leeyoung
- Re: [Pce] New Version Notification for draft-lee-… Zhangxian (Xian)
- Re: [Pce] New Version Notification for draft-lee-… Daniele Ceccarelli
- Re: [Pce] New Version Notification for draft-lee-… Leeyoung
- Re: [Pce] New Version Notification for draft-lee-… Leeyoung
- Re: [Pce] New Version Notification for draft-lee-… Ramon Casellas
- Re: [Pce] New Version Notification for draft-lee-… Igor Bryskin
- Re: [Pce] New Version Notification for draft-lee-… Leeyoung
- Re: [Pce] New Version Notification for draft-lee-… Leeyoung
- Re: [Pce] New Version Notification for draft-lee-… Igor Bryskin
- Re: [Pce] FW: New Version Notification for draft-… Jeff Tantsura
- Re: [Pce] FW: New Version Notification for draft-… Dhruv Dhody
- Re: [Pce] FW: New Version Notification for draft-… Leeyoung
- Re: [Pce] FW: New Version Notification for draft-… Igor Bryskin
- Re: [Pce] FW: New Version Notification for draft-… Ramon Casellas
- Re: [Pce] FW: New Version Notification for draft-… Ramon Casellas
- Re: [Pce] FW: New Version Notification for draft-… Igor Bryskin