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Proposed TLA and NLA Assignment Rule (RFC2450)

IP.com Disclosure Number: IPCOM000003028D
Original Publication Date: 1998-Dec-01
Included in the Prior Art Database: 2000-Sep-13
Document File: 9 page(s) / 23K

Publishing Venue

Internet Society Requests For Comment (RFCs)

Related People

R. Hinden: AUTHOR

Abstract

This document proposes rules for Top-Level Aggregation Identifiers (TLA ID) and Next-Level Aggregation Identifiers (NLA ID) as defined in [AGGR]. These proposed rules apply to registries allocating TLA ID's and to organizations receiving TLA ID's.

This text was extracted from a ASCII document.
This is the abbreviated version, containing approximately 12% of the total text.

Network Working Group R. Hinden

Request for Comments: 2450 Nokia

Category: Informational December 1998

Proposed TLA and NLA Assignment Rules

Status of this Memo

This memo provides information for the Internet community. It does

not specify an Internet standard of any kind. Distribution of this

memo is unlimited.

Copyright Notice

Copyright (C) The Internet Society (1998). All Rights Reserved.

1.0 Introduction

This document proposes rules for Top-Level Aggregation Identifiers

(TLA ID) and Next-Level Aggregation Identifiers (NLA ID) as defined

in [AGGR]. These proposed rules apply to registries allocating TLA

ID's and to organizations receiving TLA ID's.

This proposal is intended as input from the IPng working group to the

IANA and Registries. It is not intended for any official IETF

status. Its content represents the result of extensive discussion

between the IPng working group, IANA, and Registries.

The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT",

"SHOULD", "SHOULD NOT", "RECOMMENDED", "MAY", and "OPTIONAL" in this

document are to be interpreted as described in [RFC 2119].

2.0 Scope

The proposed TLA and NLA assignment rules described in this document

are intended for the first two years of IPv6 TLA address assignments.

As routing technology evolves and we gain additional experience with

allocating IPv6 addresses the procedures proposed in this document

may change.

3.0 IPv6 Aggregatable Global Unicast Address Format

This document proposes assignment rules for the TLA ID and NLA ID

fields in the IPv6 Aggregatable Global Unicast Address Format. This

address format is designed to support both the current provider-based

aggregation and a new type of exchange-based aggregation. The

combination will allow efficient routing aggregation for sites that

connect directly to providers and for sites that connect to

exchanges. Sites will have the choice to connect to either type of

aggregation entity.

While this address format is designed to support exchange-based

aggregation (in addition to current provider-based aggregation) it is

not dependent on exchanges for its overall route aggregation

properties. It will provide efficient route aggregation with only

provider-based aggregation.

The aggregatable global unicast address format as defined in [AGGR]

is as follows:

| 3| 13 | 8 | 24 | 16 | 64 bits |

+--+-----+---+--------+--------+--------------------------------+<...