Internet-Draft | OSPFv3 for BIER-TE | July 2022 |
Chen, et al. | Expires 6 January 2023 | [Page] |
This document describes OSPFv3 extensions for distributing BitPositions configured on the links in "Bit Index Explicit Replication Traffic Engineering" (BIER-TE) domain.¶
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[I-D.ietf-bier-te-arch] introduces Bit Index Explicit Replication (BIER) Traffic/Tree Engineering (BIER-TE). It is an architecture for per-packet stateless explicit point to multipoint (P2MP) multicast path/tree. A link in a BIER-TE domain has its BitPositions. For a link between two nodes X and Y, there are two BitPositions for two forward connected adjacencies. These two adjacency BitPositions could be configured on nodes X and Y respectively. The BitPosition configured on X is the forward connected adjacency of Y. The BitPosition configured on Y is the forward connected adjacency of X.¶
This document proposes OSPFv3 extensions for distributing BitPositions configured on the links in "Bit Index Explicit Replication Traffic Engineering" (BIER-TE) domain.¶
This section describes protocol extensions to OSPFv3 for distributing BIER-TE information such as the BitPositions configured on the links in a BIER-TE domain.¶
[RFC8362] defines OSPFv3 Extended Router LSA, which may include multiple Router-Link TLVs. A Router-Link TLV defines a single router link. A Router-Link TLV may include a BIER-TE Sub-TLV below for distributing BIER-TE information. This Sub-TLV has the following format.¶
Note that if each of BitPosition and DrEndBitPosition uses more than 2 octets, we use 4 or more octets for each of them.¶
Under "OSPFv3 Extended-LSA Sub-TLVs registry" as defined in [RFC8362], IANA is requested to assign a new registry value for BIER-TE Sub-TLV as follows:¶
+==============+===================+=====================+ | Value | Description | reference | +==============+===================+=====================+ | TBD1 (30) | BIER-TE | This document | +--------------+-------------------+---------------------+¶
The authors would like to thank Acee Lindem and Tony Przygienda for their comments on this work.¶