Re: [Ietf-hub-bangalore] IP hop by hop routing with TE

Dhruv Dhody <dhruv.ietf@gmail.com> Fri, 06 May 2016 14:08 UTC

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From: Dhruv Dhody <dhruv.ietf@gmail.com>
To: sujay gupta <sujay.ietf@gmail.com>
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Subject: Re: [Ietf-hub-bangalore] IP hop by hop routing with TE
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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
>>>
>>>
>>
>