draft-ietf-idr-large-community-07.txt   draft-ietf-idr-large-community-08.txt 
IDR J. Heitz, Ed. IDR J. Heitz, Ed.
Internet-Draft Cisco Internet-Draft Cisco
Intended status: Standards Track J. Snijders, Ed. Intended status: Standards Track J. Snijders, Ed.
Expires: May 17, 2017 NTT Expires: May 18, 2017 NTT
K. Patel K. Patel
Arrcus Arrcus
I. Bagdonas I. Bagdonas
Equinix Equinix
N. Hilliard N. Hilliard
INEX INEX
November 13, 2016 November 14, 2016
BGP Large Communities BGP Large Communities
draft-ietf-idr-large-community-07 draft-ietf-idr-large-community-08
Abstract Abstract
This document describes the BGP Large Communities attribute, an This document describes the BGP Large Communities attribute, an
extension to BGP-4. This attribute provides a mechanism to signal extension to BGP-4. This attribute provides a mechanism to signal
opaque information within separate namespaces to aid in routing opaque information within separate namespaces to aid in routing
management. The attribute is suitable for use with four-octet management. The attribute is suitable for use with four-octet
Autonomous System Numbers. Autonomous System Numbers.
Requirements Language Requirements Language
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Internet-Drafts are working documents of the Internet Engineering Internet-Drafts are working documents of the Internet Engineering
Task Force (IETF). Note that other groups may also distribute Task Force (IETF). Note that other groups may also distribute
working documents as Internet-Drafts. The list of current Internet- working documents as Internet-Drafts. The list of current Internet-
Drafts is at http://datatracker.ietf.org/drafts/current/. Drafts is at http://datatracker.ietf.org/drafts/current/.
Internet-Drafts are draft documents valid for a maximum of six months Internet-Drafts are draft documents valid for a maximum of six months
and may be updated, replaced, or obsoleted by other documents at any and may be updated, replaced, or obsoleted by other documents at any
time. It is inappropriate to use Internet-Drafts as reference time. It is inappropriate to use Internet-Drafts as reference
material or to cite them other than as "work in progress." material or to cite them other than as "work in progress."
This Internet-Draft will expire on May 17, 2017. This Internet-Draft will expire on May 18, 2017.
Copyright Notice Copyright Notice
Copyright (c) 2016 IETF Trust and the persons identified as the Copyright (c) 2016 IETF Trust and the persons identified as the
document authors. All rights reserved. document authors. All rights reserved.
This document is subject to BCP 78 and the IETF Trust's Legal This document is subject to BCP 78 and the IETF Trust's Legal
Provisions Relating to IETF Documents Provisions Relating to IETF Documents
(http://trustee.ietf.org/license-info) in effect on the date of (http://trustee.ietf.org/license-info) in effect on the date of
publication of this document. Please review these documents publication of this document. Please review these documents
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+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
Global Administrator: A four-octet namespace identifier. Global Administrator: A four-octet namespace identifier.
Local Data Part 1: A four-octet operator-defined value. Local Data Part 1: A four-octet operator-defined value.
Local Data Part 2: A four-octet operator-defined value. Local Data Part 2: A four-octet operator-defined value.
The Global Administrator field is intended to allow different The Global Administrator field is intended to allow different
Autonomous Systems to define BGP Large Communities without collision. Autonomous Systems to define BGP Large Communities without collision.
This field SHOULD be either one of the reserved values as defined This field SHOULD either be one of the reserved values as defined
below, or an Autonomous System Number (ASN). If it is a reserved below, or an Autonomous System Number (ASN). If it is a reserved
value, then the Local Data Parts are as defined by the reserved value, then the Local Data Parts are as defined by the reserved
value. If it is an ASN then the Local Data Parts are to be value. If it is an ASN then the Local Data Parts are to be
interpreted as defined by the owner of the ASN. interpreted as defined by the owner of the ASN.
There is no significance to the order in which twelve-octet Large There is no significance to the order in which twelve-octet Large
Community Attribute values are encoded in a Large Communities Community Attribute values are encoded in a Large Communities
attribute, A BGP speaker can transmit them in any order. attribute, A BGP speaker can transmit them in any order.
Duplicate BGP Large Community values SHOULD NOT be transmitted. A Duplicate BGP Large Community values MUST NOT be transmitted. A
receiving speaker SHOULD silently remove duplicate BGP Large receiving speaker MUST silently remove duplicate BGP Large Community
Community values from a BGP Large Community attribute. values from a BGP Large Community attribute.
3. Aggregation 3. Aggregation
If a range of routes is aggregated, then the resulting aggregate If a range of routes is aggregated, then the resulting aggregate
should have a BGP Large Communities attribute which contains all of should have a BGP Large Communities attribute which contains all of
the BGP Large Communities attributes from all of the aggregated the BGP Large Communities attributes from all of the aggregated
routes. routes.
4. Canonical Representation 4. Canonical Representation
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