Aut-num Object

The autonomous system (aut-num) object provides contact information for the AS and describes the routing policy of the AS. The routing policy is described by enumerating all neighboring AS's with which the routing information is exchanged. For each neighbor, the routing policy is described in terms of exactly what is being sent (announced) and allowed in (accepted). Each aut-num object describes what can be implemented and enforced locally by the AS concerned.

Broadband One currently does not use aut-num objects as a basis for routing policy. A sample Aut-Num object (preferred format):

aut-num:        AS12345
as-name:        ACME-AS
descr:          ACME Widgets of America 
import:         from A56789
                action pref=100;
                accept ANY
export:         to AS56789
                announce AS12345
admin-c:        ZA1
tech-c:         ZA1
notify:         zacme@acme.com
mnt-by:         MAINT-AS12345
changed:        zacme@acme.com 19960626
source:         BBOI

Object Template

aut-num:        [mandatory]  [single]     [primary/look-up key]
as-name:        [mandatory]  [single]     [ ]
descr:          [mandatory]  [multiple]   [ ]
member-of:      [optional]   [multiple]   [inverse key]
import:         [optional]   [multiple]   [ ]
export:         [optional]   [multiple]   [ ]
default:        [optional]   [multiple]   [ ]
remarks:        [optional]   [multiple]   [ ]
admin-c:        [mandatory]  [multiple]   [inverse key]
tech-c:         [mandatory]  [multiple]   [inverse key]
cross-mnt:      [optional]   [multiple]   [inverse key]
cross-nfy:      [optional]   [multiple]   [inverse key]
notify:         [optional]   [multiple]   [inverse key]
mnt-lower:      [optional]   [multiple]   [inverse key]
mnt-routes:     [optional]   [multiple]   [inverse key]
mnt-by:         [mandatory]  [multiple]   [inverse key]
changed:        [mandatory]  [multiple]   [ ]
source:         [mandatory]  [single]     [ ]

Attribute Descriptions

aut-num: The autonomous system number. This must be a uniquely allocated autonomous system number from an AS registry (e.g. RIPE NCC, the Inter-NIC, etc), or one uniquely generated for the Broadband One routing registry. "AS"(positive integer between 1 and 65535)

as-name: A descriptive name associated with an AS. Uppercase letters, dashes ("-") and digits, no spaces - must start with a letter.

descr: A short description of this object. All characters are possible. The description field may span multiple lines, either with or without labels.

member-of: A reverse-key reference to an as-set object. This does not have to be present even if the aut-num is a member of an as-set.

import: A set of statements describing the import policy of that aut-num object. Each policy statement may be on a single or multiple lines, but an individual statement should only contain a single import: label. For example, the following policies may be written in either of the following ways:

import: from AS2 action pref = 1; accept { 128.9.1.0/24 } 
import: from AS3 action pref = 1; accept { 128.9.2.0/24 } 
OR:
import:		from AS2
               	action pref = 1;
                accept { 128.9.1.0/24 }
import:     	from AS3
               	action pref = 1;
                accept { 128.9.2.0/24 }

export: A set of statements describing the export policy of that aut-num object. Each policy statement may be on a single or multiple lines, but an individual statement should only contain a single export: label. For example the following policies may be written in either of the following ways:

export:		to AS4 announce AS1
export:		to AS5 announce AS1
OR:
export:		to AS4
		announce AS1
export:		to AS5 
                announce AS1

default: Default routing policies are specified using the default attribute. Each statement may be on a single or multiple lines, but an individual statement should only contain a single default: label. For example:

default: 	to AS2 action pref = 1;
default: 	to AS3 action pref = 2;
OR:
default: 	to AS2 
                action pref = 1;
default: 	to AS3 
                action pref = 2;

remarks: General remarks. Can include an URL or RFC822 email address (preceded by mailto:) - may span multiple lines, either with or without multiple remarks: labels.

admin-c: An on-site contact (person) represented by (NIC-handle ), which links to a person object.

tech-c: A technical contact, represented by (NIC-handle ), which links to a person object.

notify: The e-mail address to which notifications of changes to an object should be sent (RFC-822 format).

mnt-by: The identifier of a registered maintainer object used for and authentication. changed: Who previously changed this object. (RFC822 e-mail address) E-mail address of person updating the object.

source: The identifier of the database containing authoritative data for this object. This should be BBOI (in upper case) for all Broadband One maintainers.

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