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

Dhruv Dhody <dhruv.ietf@gmail.com> Sat, 07 May 2016 04:54 UTC

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Date: Sat, 7 May 2016 10:24:14 +0530
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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,

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
>>>>>
>>>>>
>>>>
>>>
>>
>