draft: draft-zhang-idr-sr-policy-enhanced-detnet
Type: Proposed Standard
status: Individual Draft (expired 12/29/2024)
Pre-Adoption: Needs -04.
current version: 03, Needs
Unicast and Multicast or both: Bogh
Early Allocation: will need
Cross-WG review: Spring (TBD) and detnet (may take time)
implementations: TBD
bgp-ls draft: none
draft: draft-zhang-idr-sr-policy-enhanced-detnet
email: https://mailarchive.ietf.org/arch/msg/idr/5K1cJuiMX28Z28k03fxCnPyhRmA/
status: Needs revision (-04)
Old text:/
SR Policy is a set of candidate SR paths consisting of one or more
segment lists and necessary path attributes. It enables
instantiation of an ordered list of segments with a specific intent
for traffic steering. DetNet provides the capability to carry
specified unicast or multicast data flows with extremely low data
loss rates and bounded end-to-end latency within a network domain.
This document defines the SR policy enhancement to carry the Bounded
Latency Information with a candidate path of SR policy. So that BLI
behavior can be enabled automatically when the SR Policy is applied./
new text:/
SR Policy is a set of candidate SR paths consisting of one or more
segment lists and necessary path attributes. It enables
instantiation of an explicit ordered list of segments with a specific intent
for traffic steering. BGP distributes the SR Policy for unicast
Segment Routing (SR) paths via the SR-Policy NLRIs accompanied
with the Tunnel Encapsulation attribute for the SR Policy Tunnel.
For multicast SR paths, BGP distributes the SR P2MP NLRIs accompanied
by the SR P2MP Policy tunnel.DetNet provides the capability to carry specified unicast or
multicast data flows with extremely low data loss rates and
bounded end-to-end latency within a network domain.
This document defines the SR policy enhancement to carry the Bounded
Latency Information with a candidate path of unicast and multicast
SR paths. The distribution of the Bounded Latency Information (BLI)
allows the behavior can be enabled automatically when the SR Policy
is applied./
[draft-ietf-spring-segment-routing-policy] has been replace by [RFC9256]
[draft-ietf-idr-segment-routing-te-policy] has been replaced by
[draft-ietf-idr-sr-policy-safi] and [draft-ietf-idr-sr-segtypes-ext].
Old text:/
Segment Routing Policy is defined
in[I-D.ietf-spring-segment-routing-policy]. A SR Policy is a set of
candidate path which consist of one or more segment lists. The
headend node instructs the source routing and writes it into package.
The packets steered into an SR Policy have an ordered list of
segments associated with that SR Policy written into them. [RFC8655]
provides the overall architecture for Deterministic Networking
(DetNet), which provides the capability to carry specified unicast or
multicast data flows with extremely low data loss rates and bounded
end-to-end latency within a network domain. /
/
New text:/
Segment Routing (SR) Policy is defined in [RFC9256]. A SR Policy is a set of
candidate path which consist of one or more segment lists. The
headend node instructs the source routing and writes it into SR Header.
The packets steered into an SR Policy have an ordered list of
segments associated with that SR Policy written into them./An explicit SR Candidate Path is described in [RFC9256] in section 5.1.
BGP passes the explicit segment paths for unicast Segment Routing (SR) paths
via the SR-Policy NLRIs accompanied with the Tunnel Encapsulation
(Tunnel-Encaps) attribute with the SR Policy Tunnel type TLV
for unicast traffic as defined in [draft-ietf-idr-sr-policy-safi]
and augmented by [draft-ietf-idr-sr-segtypes-ext]. BGP pases the
explicit segment paths for multicast SR paths via the
SR P2MP Policy NLRI accompanied by the Tunnel-Encaps attribute
for the SR P2MP Policy tunnel type as defined by
[draft-ietf-idr-sr-p2mp-policy].[RFC8655] provides the overall architecture for Deterministic Networking
(DetNet), which provides the capability to carry specified unicast or
multicast data flows with extremely low data loss rates and bounded
end-to-end latency within a network domain. (continue on with paragraph)/
Old text at end of section:/
This document defines the SR policy enhancement to carry the Bounded
Latency Information with a candidate path of SR policy. So that BLI
behavior can be enabled automatically when the SR Policy is applied./
new text:/
This document defines a new sub-TLV for Segment List Sub-TLV
that defines the Unicast Explicit SR Path for an SR candidates policy./
Note: If you intend to add this to multicast, then add the following text:
New-text-adition:
This document defines a new Sub-TLV for the Segment List Sub-TLV that
defines bounded latency information (BLI) that can be part of a
Segment List Sub-TLV for a Unicast Explicit SR Candidate Policy.
This new Sub-TLV for BLI can also be a part of the segment-list of
the SR P2MP Tunnel TLV. /
[draft-ietf-idr-segment-routing-te-policy] has been replaced by
[draft-ietf-idr-sr-policy-safi] and [draft-ietf-idr-sr-segtypes-ext].
See [draft-ietf-sr-policy-safi] for ideas.
You do not need to add text that is in [draft-ietf-sr-policy-safi], but
you need to add security comments about BLI as new critical information.