Changwang,
please see inline:
On 06/05/2025 10:12, linchangwang wrote:
Hi WG,
As a vendor, this feature has been successfully integrated with
multiple vendors in the EANTC tests for 2024 and 2025.
The EANTC test link for 2025 is as follows:
https://wiki.eantc.de/wiki/publicreports/view/Main/Multi-Vendor%20MPLS%20%26%20SDN%20Interoperability%20Test%20Report%202025/SRv6/SRv6%20Unreachable%20Prefix%20Announcement
In the specific implementation, the following two issues were encountered:
*1.*The implementation MUST or SHOULD include the U or UP flag? From an
implementation perspective, would basic interoperability be achieved
by just implementing Sections 2, 3, and 4 of the document?
Specifically:
On the sender side: Advertising unreachability via max-cost
On the receiver side: Controlling fast max-cost processing through
configuration
The U/UP flags in Chapter 5 (including Section 5.3 descriptions)
appear non-essential for interoperability,
as they merely indicate unreachability reasons.
When advertising unreachable prefixes from the sender side, is it
necessary to include the U or UP Flag?
the notion of prefix unreachable metric does not require these new
flags. They are indicating the reason for unreachability. An
implementation can use the advertisement with the unreachable metric as
UPA even without these flags.
*2**．*Configuration Management Considerations:
Should the sender-side U/UP flag settings also be
configuration-controlled?
that is an implementation choice and should not be specified in the RFC
thanks,
Peter
Recommendation: Add a configuration management section specifying
implementation guidance,
for example, consider configuration management similar to the
following command line:
prefix-unreachable { advertise-lifetime <value> | advertise-metric
<value> | advertise-flags-enable | advertise-maximum <value> |
receive-process-enable }
Implement configurable controls for:
•Unreachable prefix generation parameters (metric, timers, U/UP flag)
•Unreachable prefix processing policies
Thanks,
Changwang
*发件人:*Yingzhen Qu <[email protected]>
*发送时间:*2025年4月18日2:13
*收件人:*lsr <[email protected]>; lsr-chairs <[email protected]>
*主题:*[Lsr] WG Last Call for draft-ietf-lsr-igp-ureach-prefix-announce
(4/17/2025 - 5/2/2025)
Hi,
This email begins a 2 week WG Last Call for the following draft:
IGP Unreachable Prefix Announcement
https://datatracker.ietf.org/doc/draft-ietf-lsr-igp-ureach-prefix-announce/
<https://datatracker.ietf.org/doc/draft-ietf-lsr-igp-ureach-prefix-announce/>
Please review the document and indicate your support or objections by
May 2nd, 2025.
Authors and contributors,
Please indicate to the list your knowledge of any IPR related to this
work.
Thanks,
Yingzhen
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