Hi Dhruv and Stephane,
Thanks for your review and comments!
I appreciated the comments from you last meeting and updated the draft this
meeting.
Multiple <ELI, EL> pairs MAY be inserted in the SR-MPLS label stack as defined
in RFC8662 secssion 7.1.
So from implementation view, the ingress MUST support the capability of
inserting multiple ELI/ELs.
And in case of inter-domain scenario, PCE would be useful for computing both SR
path and the placement of entropy labels.
So I agree with you. We need to extend the capability at ingress node in
control plane. But I think the capability is no need to be advertised by IGP
protocol.
PCE might not be aware of the capability of ingress to push ELI/EL pairs. We
should add the capability in OPEN message from PCC to PCE.
There are two options for us.
A, add a new bit to indicate the capability of ingress to push ELI/EL pairs.
B, reuse the E (ELP) bit to indicate the capability of inserting multiple
ELI/EL pairs at PCC and support the SR path with ELP from PCE when PCC send
OPEN message to PCE.
I updated the draft as the option 2. Could you please tell me what is your
suggestion?
And any comments are welcome!
Thanks,
Quan
原始邮件
发件人：DhruvDhody <[email protected]>
收件人：[email protected]
<[email protected]>;[email protected]
<[email protected]>;
抄送人：[email protected] <[email protected]>;
日 期 ：2020年07月26日 19:56
主 题 ：A pending item for draft-peng-pce-entropy-label-position
Hi Authors, Stephane,
In the last meeting [1], Stephane mentioned that the PCE is unaware of
the PCC's capability to push ELI/EL pairs and thus questioned the
usability of your I-D. He mentioned that existing information in
IGP/BGP-LS i.e. MSD, ELC, ERLD does not tell the PCC's capability to
push ELI/EL pairs.
The current draft has a single bit ELP -
A PCC sets this flag to 1 to
indicate that it supports the capability of inserting multiple ELI/EL
pairs and and supports the results of SR path with ELP from PCE.
I want to confirm if this bit and BMI-MSD enough? If not, what else?
It would be good if this can be discussed here or during the meeting.
Thanks!
Dhruv
[1] https://datatracker.ietf.org/doc/minutes-106-pce/_______________________________________________
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