Subject: [Bier] IPA replace BAR - inconsistency across documents

From: benjamin r <[email-masked]>
Date: Wed, 27 Feb 2019 13:46:01 +0000

Hi All,

draft-ietf-bier-bar-ipa-03 states "If BA is not NULL, AG is set to BA."
This means, BAR take precedence over IPA.
This statement is conflicting with the OSPF/ISIS RFCs, which states IPA replaces path calculation defined by BAR value.

Excerpts from rfc8444 - Section 2.1.

   IPA:  Single-octet IGP Algorithm used to either modify, enhance, or
      replace the calculation of underlay paths to reach other BFRs as
      defined by the BAR value.  Values are defined in the "IGP
      Algorithm Types" registry [IANA-IGP].

Excerpts from rfc8401 - Section 6.1.

IPA: IGP Algorithm. Specifies an IGP Algorithm to either modify,
enhance, or replace the calculation of underlay paths to reach
BFERs as defined by the BAR value. Values are from the IGP
Algorithm registry. 1 octet.

To avoid confusions, can we update the texts in rfc8444 and rfc8401 to align with draft-ietf-bier-bar-ipa-03 ?

Thanks
Benjamin R
VRP PDU, Network Business Line
Huawei Technologies India Pvt. Ltd.
Survey No. 37, Next to EPIP Area, Kundalahalli, Whitefield
Bengaluru-560066, Karnataka
Tel: + 91-80-49160700 Ext II Mob: 8123906320 Email: [email-masked]<mailto:[email-masked]>
[Company_logo]

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