Re: [Pce] A question about RFC8281 PCE-initiated LSPs.

[Dhruv Dhody <[e-mail]>]

Hi Quan,


As per [1]:

       A PCE initiating a new LSP, can include the association group
   information.  This is done by including the ASSOCIATION Object in a
   PCInitiate message.

So when a new LSP is created by PCE, you could still indicate the association. The association is not limited to existing LSPs.

Hope this helps! Let me know if I understood your question correctly!

Regards,
Dhruv

[1] https://tools.ietf.org/html/draft-ietf-pce-association-group-04#section-5.2.1

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Sent: 23 January 2018 13:07
To: Dhruv Dhody <[e-mail]>; [e-mail]
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Subject: Re: [Pce] A question about RFC8281 PCE-initiated LSPs.

Hi Dhruv,


Thank you for the reply!O(∩_∩)O~

I agree two created PCE-initiated LSPs may be associated by ASSOCIATION object as discussed in draft-barth-pce-association-bidir.

But if there is no LSP existed, how to request a bi-directional TE LSP from PCE in PCE initiated operation?


Quan Xiong

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Re: [Pce] A question about RFC8281 PCE-initiated LSPs.

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To: "xiong.quan at zte.com.cn" <xiong.quan at zte.com.cn>, "edward.crabbe at gmail.com" <edward.crabbe at gmail.com>, "inaminei at google.com" <inaminei at google.com>, "msiva at cisco.com" <msiva at cisco.com>, "robert.varga at pantheon.tech" <robert.varga at pantheon.tech>
Subject: Re: [Pce] A question about RFC8281 PCE-initiated LSPs.
From: Dhruv Dhody <dhruv.dhody at huawei.com>
Date: Tue, 23 Jan 2018 03:28:27 +0000
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Hi Quan,



Check out -  https://datatracker.ietf.org/doc/draft-barth-pce-association-bidir/

Authors are in cc, if you need to have further discussion!



Thanks!

Dhruv



From: Pce [mailto:pce-bounces at ietf.org] On Behalf Of xiong.quan at zte.com.cn
Sent: 23 January 2018 07:37
To: edward.crabbe at gmail.com; inaminei at google.com; msiva at cisco.com; robert.varga at pantheon.tech
Cc: hu.fangwei at relay.zte.com.cn; pce at ietf.org
Subject: [Pce] A question about RFC8281 PCE-initiated LSPs.



Hi all,


I encountered a problem as following shown.O(∩_∩)O~

As defined in RFC5440,the PCC-initiated LSPs creation uses the B bit in RP object of PCReq message to indicate the direction of the TE LSP.
When set, the PCC requests a bi-directional TE LSP and when cleared, the TE LSP is unidirectional.

And in stateful PCE, RFC8281 proposed the PCE-initiated LSPs and the PCE could send a PCInitiate message to the PCC to request the creation of an LSP.
The PCInitiate message carry the Objects including SRP, LSP ,END-POINTS and ERO. But no B bit in SRP object.

How to configure the direction of the TE LSP in PCE-initiated operation?

Best Regards,

Quan Xiong





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