Re: [Ietf-hub-bangalore] IP hop by hop routing with TE
sujay gupta <sujay.ietf@gmail.com> Sat, 07 May 2016 07:04 UTC
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Date: Sat, 07 May 2016 00:04:05 -0700
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From: sujay gupta <sujay.ietf@gmail.com>
To: Dhruv Dhody <dhruv.ietf@gmail.com>
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Cc: ietf-hub-bangalore@ietf.org, "dhruv.dhody@huawei.com" <dhruv.dhody@huawei.com>
Subject: Re: [Ietf-hub-bangalore] IP hop by hop routing with TE
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Hi Dhruv That's good. I believe if I have a constrained route map, i can program a openflow directed path all across like how routeflow does. The challenge will remain if the switches are running both OF and legacy routing, where a label concept to distinguish constrained traffic needs to come. (& hence back to MPLS etc.) But yes all the discussion we had is useful. Regards, -Sujay On Fri, May 6, 2016 at 9:54 PM, Dhruv Dhody <dhruv.ietf@gmail.com> wrote: > Hi Sujay, > > Currently we are working on ONOS G release to have CSPF and PCE built in. > But you do need to figure out which southbound to use? Can OF carry Ipv6-SR > header? > > Regards, > Dhruv > > > On Sat, May 7, 2016 at 4:16 AM, sujay gupta <sujay.ietf@gmail.com> wrote: > >> Hi Dhruv, >> >> Good idea on using SR, but which PCE controller has inbuilt application >> for constraint based routing? >> >> Regards. >> -Sujay >> >> >> >> On Fri, May 6, 2016 at 7:08 AM, Dhruv Dhody <dhruv.ietf@gmail.com> wrote: >> >>> Hi Sujay, >>> >>> On Fri, May 6, 2016 at 6:56 PM, sujay gupta <sujay.ietf@gmail.com> >>> wrote: >>> >>>> HI Dhruv >>>> >>>> Thanks for the link it is a good introduction and relevant details on >>>> the TE. >>>> >>>> So when you say PCE works currently with MPLS, I would typically need a >>>> controller (PCEP controller) with a TE database and BGP-LS >>>> for feeding the information, right? >>>> >>> >>> Yes! >>> >>> >>> >>>> >>>> Which comes to the next question after PCEP controller has the TED, is >>>> running a CSPF path a part of the PCEP role, or an application has to be >>>> build over it? >>>> >>> >>> Both option exist. For in case of ODL, the application decides the >>> path, in some controller the path computation algorithm is built in. >>> >>> >>> >>>> >>>> My use case is a single IGP domain requiring light-weight TE. >>>> >>>> Hence my choice would be a constraint based source routing mechanism. >>>> The intelligence for which can be calculated using OSPF-TE or ISIS-TE, but >>>> the question >>>> remains is how do set up the transport path without MPLS. >>>> >>> >>> The protocol "PCEP" might not help you, but what if after computing the >>> path you use openflow to set the "flow" (in MPLS we would call that LSP) on >>> each node. >>> >>> Another option would be SR with IPv6 in data plane. >>> >>> and then there is this - >>> https://tools.ietf.org/html/draft-ietf-isis-pcr-05 and >>> http://www.ieee802.org/1/pages/802.1ca.html >>> >>> Hope this helps! >>> >>> Regards, >>> Dhruv >>> >>> >>> >>>> Regards, >>>> -Sujay >>>> >>>> >>>> >>>> >>>> >>>> On Thu, May 5, 2016 at 5:14 AM, Dhruv Dhody <dhruv.ietf@gmail.com> >>>> wrote: >>>> >>>>> Hi Sujay, >>>>> >>>>> PCE *currently* works well with MPLS (RSVP-TE signaling or Segement >>>>> Routing without signalling). >>>>> >>>>> If no MPLS, checkout https://datatracker.ietf.org/doc/rfc3272/ which >>>>> might give you some ideas. >>>>> >>>>> Regards, >>>>> Dhruv >>>>> >>>>> On Thu, May 5, 2016 at 5:37 AM, sujay gupta <sujay.ietf@gmail.com> >>>>> wrote: >>>>> >>>>>> Hi Group >>>>>> >>>>>> >>>>>> I am trying to do a hop by hop IP routing with guaranteed/reserved >>>>>> bandwidth for a certain traffic class. >>>>>> >>>>>> The decision should be dynamic, so i will need some IGP or EGP TE >>>>>> extension. >>>>>> >>>>>> So how can I do this with a central controller? (PCE??) >>>>>> And can I do this without a central controller ( equivalent to >>>>>> MPLS;RSVP -TE but without MPLS) >>>>>> >>>>>> Any thoughts? >>>>>> >>>>>> Regards, >>>>>> -Sujay >>>>>> >>>>>> _______________________________________________ >>>>>> Ietf-hub-bangalore mailing list >>>>>> Ietf-hub-bangalore@ietf.org >>>>>> https://www.ietf.org/mailman/listinfo/ietf-hub-bangalore >>>>>> >>>>>> >>>>> >>>> >>> >> >
- [Ietf-hub-bangalore] IP hop by hop routing with TE sujay gupta
- Re: [Ietf-hub-bangalore] IP hop by hop routing wi… Dhruv Dhody
- Re: [Ietf-hub-bangalore] IP hop by hop routing wi… sujay gupta
- Re: [Ietf-hub-bangalore] IP hop by hop routing wi… Dhruv Dhody
- Re: [Ietf-hub-bangalore] IP hop by hop routing wi… sujay gupta
- Re: [Ietf-hub-bangalore] IP hop by hop routing wi… Dhruv Dhody
- Re: [Ietf-hub-bangalore] IP hop by hop routing wi… sujay gupta