Authors,
While reviewing this document during AUTH48, please resolve (as necessary) the
following questions, which are also in the XML file.
1) <!--[rfced] Luc André, FYI, we updated your name to match
how you updated it in RFC 9722 during AUTH48 recently.
Please let us know if you prefer otherwise.
-->
2) <!-- [rfced] FYI, we note that RFC 5306 does not mention "LDP".
Apparently the digits were transposed, so we updated the reference
from [RFC5306] to [RFC5036], titled "LDP Specification".
Please let us know if this is not accurate.
Original:
b. Port-Active redundancy eliminates the need for ICCP and LDP
[RFC5306] (e.g., VXLAN [RFC7348] or SRv6 [RFC8402] may be used in
the network).
Current:
b. It eliminates the need for ICCP and LDP [RFC5036] (e.g., Virtual
eXtensible Local Area Network (VXLAN) [RFC7348] or Segment
Routing over IPv6 (SRv6) [RFC8402] may be used in the network).
-->
3) <!--[rfced] The text states that one or more PEs keep the port in
standby mode. Do one or more PEs keep the port in active mode
as shown below?
Original:
PEs in the redundancy group leverage the DF election defined in
[RFC8584] to determine which PE keeps the port in active mode and
which one(s) keep it in standby mode.
Perhaps:
PEs in the redundancy group leverage the DF election defined in
[RFC8584] to determine which PE(s) keeps the port in active mode
and which PE(s) keeps it in standby mode.
-->
4) <!-- [rfced] [RFC7432] does not mention a "Single-Active blocking
scheme", but it does mention "Single-Active redundancy mode". Is
an update perhaps needed to the text below?
Original:
Non-DF routers SHOULD implement a bidirectional blocking scheme
for all traffic comparable to the Single-Active blocking scheme
described in [RFC7432], albeit across all VLANs.
-->
5) <!--[rfced] Should Figure 2 be updated to show the T bit as
defined in RFC-to-be 9722 (draft-ietf-bess-evpn-fast-df-recovery-12),
which is currently in AUTH48 state? If so, should any text
be added to mention that document?
(This question also appears in RFC-to-be 9785.)
Original:
1 1 1 1 1 1
0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|D|A| |P| |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
Perhaps:
1 1 1 1 1 1
0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|D|A| |T| |P| |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
-->
6) <!--[rfced] How may we rephrase this sentence for clarity? We note
that "DF Elected" is not used elsewhere in the document or in the
normative references; should "Elected" perhaps be removed (option A),
or should "election" perhaps be used instead (option B)?
Also note that RFC 8584 expands "BDF" as "Backup Designated Forwarder"
(rather than "Back-up DF Elected"); may we update this expansion
accordingly?
Original:
The algorithm to detemine the DF Elected and Backup-DF
Elected (BDF) at Section 3.2 of [RFC8584] is repeated
and summarized below using only (Es) in the computation:
Perhaps A:
The algorithm used to determine the DF and Backup Designated
Forwarder (BDF) per Section 3.2 of [RFC8584] is repeated and
summarized below using only (Es) in the computation:
or
Perhaps B:
The algorithm used to determine the DF and Backup Designated
Forwarder (BDF) elections per Section 3.2 of [RFC8584] is
repeated and summarized below using only (Es) in the computation:
-->
7) <!--[rfced] In the title of Section 4.1, we added "Bits" as the "P and
B bits" are described in this section. Please let us know if this
update is not correct.
Original:
4.1. Primary / Backup per Ethernet-Segment
Current:
4.1. Primary/Backup Bits per Ethernet Segment
-->
8) <!--[rfced] Does the remote ESI label extended community signal a
Single-Active "procedure" or perhaps "redundancy mode"? Please
clarify.
Original:
* The remote ESI Label Extended Community ([RFC7432]) signals
Single-Active (Section 3)
Perhaps:
* The remote ESI label extended community [RFC7432] signals the
Single-Active redundancy mode (Section 3).
-->
9) <!-- [rfced] Terminology
a) Throughout the text, the following terminology appears to be used
inconsistently. Please review these occurrences and let us know if/how they
may be made consistent.
Bitmap field vs. bitmap field
[Are these different? For example, "a Bitmap (2 octets) field" vs.
"DF Election Capabilities bitmap field"]
b) We updated the text to use the form on the right for consistency
within this document and Cluster 492 (C492). Please let us know of any
objections.
active-standby -> active/standby
All-active -> All-Active
DF Election -> DF election (for general use, per RFC 8584)
DF Election extended community -> DF Election Extended Community (per RFC
8584)
'Don't Pre-empt' -> 'Don't Preempt' (per companion doc and IANA registry)
ESI Label Extended Community -> ESI label extended community (per RFC 7432)
Ethernet-AD per-ES -> Ethernet A-D per ES (per RFC 8584)
Port Mode DF Election -> Port Mode Designated Forwarder Election (per IANA)
Single-active -> Single-Active
-->
10) <!-- [rfced] Abbreviations
a) FYI: We have added expansions for the following abbreviations
per Section 3.6 of RFC 7322 ("RFC Style Guide"). Please review each
expansion in the document carefully to ensure correctness.
Customer Equipment (CE)
Cyclic Redundancy Check (CRC)
Media Access Control (MAC)
Neighbor Discovery (ND)
Segment Routing over IPv6 (SRv6)
Virtual Routing and Forwarding (VRF)
Virtual Private Wire Service (VPWS)
Virtual eXtensible Local Area Network (VXLAN)
b) For consistency within the RFC series and C492, we updated
the document to use the form on the right. Please review.
AC-Influenced Designated Forwarder Election (AC-DF) ->
AC-Influenced DF (AC-DF) election (per RFC 8584)
Interchassis Communication Protocol (ICCP) ->
Inter-Chassis Communication Protocol (ICCP)
Multi-Chassis Link Aggregation Group (MC-LAG) ->
Multi-Chassis Link Aggregation (MC-LAG) group
-->
11) <!-- [rfced] Please review the "Inclusive Language" portion of the online
Style Guide <https://www.rfc-editor.org/styleguide/part2/#inclusive_language>
and let us know if any changes are needed. Updates of this nature typically
result in more precise language, which is helpful for readers.
For example, please consider whether the following should be updated:
- black-holing
-->
Thank you.
RFC Editor/kc/ar
On May 15, 2025, [email protected] wrote:
*****IMPORTANT*****
Updated 2025/05/15
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--------------------------------------
RFC9786 (draft-ietf-bess-evpn-mh-pa-13)
Title : EVPN Port-Active Redundancy Mode
Author(s) : P. Brissette, LA. Burdet, Ed., B. Wen, E. Leyton, J. Rabadan
WG Chair(s) : Matthew Bocci, Stephane Litkowski, Zhaohui (Jeffrey) Zhang
Area Director(s) : Jim Guichard, Ketan Talaulikar, Gunter Van de Velde
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