draft-ietf-idr-flowspec-path-redirect-10.txt   draft-ietf-idr-flowspec-path-redirect-11.txt 
IDR Working Group G. Van de Velde, Ed. IDR Working Group G. Van de Velde, Ed.
Internet-Draft Nokia Internet-Draft Nokia
Intended status: Standards Track K. Patel Intended status: Standards Track K. Patel
Expires: May 1, 2020 Arrcus Expires: November 27, 2020 Arrcus
Z. Li Z. Li
Huawei Technologies Huawei Technologies
October 29, 2019 May 26, 2020
Flowspec Indirection-id Redirect Flowspec Indirection-id Redirect
draft-ietf-idr-flowspec-path-redirect-10 draft-ietf-idr-flowspec-path-redirect-11
Abstract Abstract
This document defines a new extended community known as "FlowSpec This document defines a new extended community known as "FlowSpec
Redirect to indirection-id Extended Community". This extended Redirect to indirection-id Extended Community". This extended
community triggers advanced redirection capabilities to flowspec community triggers advanced redirection capabilities to flowspec
clients. When activated, this flowspec extended community is used by clients. When activated, this flowspec extended community is used by
a flowspec client to retrieve the corresponding next-hop and encoding a flowspec client to retrieve the corresponding next-hop and encoding
information within a localised indirection-id mapping table. information within a localised indirection-id mapping table.
skipping to change at page 1, line 48 skipping to change at page 1, line 48
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This Internet-Draft will expire on May 1, 2020. This Internet-Draft will expire on November 27, 2020.
Copyright Notice Copyright Notice
Copyright (c) 2019 IETF Trust and the persons identified as the Copyright (c) 2020 IETF Trust and the persons identified as the
document authors. All rights reserved. document authors. All rights reserved.
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the Trust Legal Provisions and are provided without warranty as the Trust Legal Provisions and are provided without warranty as
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Figure 2 Figure 2
The least-significant Flag bit is defined as the 'C' (or copy) bit. The least-significant Flag bit is defined as the 'C' (or copy) bit.
When the 'C' bit is set the redirection applies to copies of the When the 'C' bit is set the redirection applies to copies of the
matching packets and not to the original traffic stream. matching packets and not to the original traffic stream.
The 'S-ID' field identifies a 4 bit Sequence ID field. This field is The 'S-ID' field identifies a 4 bit Sequence ID field. This field is
used to provide a flowspec client an indication how and where to used to provide a flowspec client an indication how and where to
sequence the received indirection-ids. The Sequence ID value 0 sequence the received indirection-ids. The Sequence ID value 0
indicates that Sequence ID field is NOT set and SHOULD be ignored. A indicates that Sequence ID field is NOT set and all other sequence
single flowspec rule MUST NOT have more as one indirection-id per ID's SHOULD be ignored. A single flowspec rule MUST NOT have more as
S-ID. On a flowspec client the indirection-id with lowest S-ID MUST one indirection-id per S-ID. On a flowspec client the indirection-id
be imposed first for any given flowspec entry. with lowest S-ID MUST be imposed first for any given flowspec entry.
All bits other than the 'C' and 'S-ID' bits MUST be set to 0 by the All bits other than the 'C' and 'S-ID' bits MUST be set to 0 by the
originating BGP speaker and ignored by receiving BGP speakers. originating BGP speaker and ignored by receiving BGP speakers.
ID-Type: 1 octet value. This draft defines following Context Types: ID-Type: 1 octet value. This draft defines following Context Types:
0 - Localised ID (The flowspec client uses the received 32-bit 0 - Localised ID (The flowspec client uses the received 32-bit
indirection-id to lookup forwarding information within the indirection-id to lookup forwarding information within the
localised indirection-id table. The allocation and programming of localised indirection-id table. The allocation and programming of
the localised indirection-id table is outside scope of the the localised indirection-id table is outside scope of the
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