rfc982.txt
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The length of the DSP can be determined since the total address
length is known, and the IDP has fixed length for any given AFI
value. The length of the DSP is between 6 and 12 octets.
The first three octets identify an organization which has been
designated as an addressing authority. This authority is
responsible for assigning values to the remainder of the DSP.
The length of the subnetwork identification is fixed at two
octets (16 bits). The assignment of subnetwork identifications
is under the control of the administering authority for the
private domain, except that the value with both octets hex "FF"
is reserved to indicate that the subnetwork is not explicitly
identified.
The length of the subnetwork address may be up to six octets,
and is determined by the DSP length minus three octets. For
subnetworks using DIS 8802 MAC addressing, this field consists
of the octets of the MAC address in the same order as they are
defined in DIS 8802.
The NSAP selector occupies a single octet.
ANSI [Page 6]
RFC 982 April 1986
ANSI Guidelines
Description of Decimal syntax
The length of the DSP can be determined since the total address
length is known, and the IDP has fixed length for any given AFI
value. The length of the DSP is between 14 and 29 decimal
digits.
The first six digits identify an organization which as been
designated as an addressing authority. This authority is
responsible for assigning values to the remainder of the DSP.
The length of the subnetwork identification is fixed at five
decimal digits. The assignment of subnetwork identifications
is under the control of the administering authority for the
private domain, except that a value of "99999" is reserved to
indicate that the subnetwork is not explicitly identified.
The length of the subnetwork address may be up to fifteen
decimal digits, and is determined by the DSP length minus eight
decimal digits.
The NSAP selector occupies three decimal digits.
7.3 F.69 DSP format guidelines
Description of Binary syntax
The length of the DSP can be determined since the total address
length is known, and the IDP has fixed length for any given AFI
value. If DSP is present, a DSP of 2 or less octets is an NSAP
selector. A DSP between 3 and 9 octets is interpreted in the
manner described below. Interpretation of a DSP greater than 9
octets in length is not specified in this report.
The length of the subnetwork identification is fixed at two
octets (16 bits). The assignment of subnetwork identifications
is under the control of the administering authority for the
private domain, except that the value with both octets hex "FF"
is reserved to indicate that the subnetwork is not explicitly
identified.
The length of the subnetwork address may be up to six octets,
and is determined by the DSP length minus three octets. For
subnetworks using DIS 8802 MAC addressing, this field consists
of the octets of the MAC address in the same order as they are
defined in DIS 8802.
ANSI [Page 7]
RFC 982 April 1986
ANSI Guidelines
The NSAP selector occupies a single octet.
Description of Decimal syntax
The length of the DSP can be determined since the total address
length is known, and the IDP has fixed length for any given AFI
value. If DSP is present, a DSP of 8 or less decimal digits is
an NSAP selector. A DSP between 8 and 23 decimal digits is
interpreted in the manner described below. Interpretation of a
DSP greater than 23 decimal digits in length is not specified
in this report.
The length of the subnetwork identification is fixed at five
decimal digits. The assignment of subnetwork identifications
is under the control of the administering authority for the
private domain, except that a value of "99999" is reserved to
indicate that the subnetwork is not explicitly identified.
The length of the subnetwork address may be up to fifteen
decimal digits, and is determined by the DSP length minute
eight decimal digits.
The NSAP selector occupies three decimal digits.
7.4 E.163 DSP format guidelines
Description of Binary syntax
The length of the DSP can be determined since the total address
length is known, and the IDP has fixed length for any given AFI
value. If DSP is present, a DSP of 2 or less octets is an NSAP
selector. A DSP between 3 and 9 octets is interpreted in the
manner described below. Interpretation of a DSP greater than 9
octets in length is not specified in this report.
The length of the subnetwork identification is fixed at two
octets (16 bits). The assignment of subnetwork identifications
is under the control of the administering authority for the
private domain, except that the value with both octets hex "FF"
is reserved to indicate that the subnetwork is not explicitly
identified.
The length of the subnetwork address may be up to six octets,
and is determined by the DSP length minus three octets. For
subnetworks using DIS 8802 MAC addressing, this field consists
of the octets of the MAC address in the same order as they are
defined in DIS 8802.
ANSI [Page 8]
RFC 982 April 1986
ANSI Guidelines
The NSAP selector occupies a single octet.
Description of Decimal syntax
The length of the DSP can be determined since the total address
length is known, and the IDP has fixed length for any given AFI
value. If DSP is present, a DSP of 8 or less decimal digits is
an NSAP selector. A DSP between 8 and 23 decimal digits is
interpreted in the manner described below. Interpretation of a
DSP greater than 23 decimal digits in length is not specified
in this report.
The length of the subnetwork identification is fixed at five
decimal digits. The assignment of subnetwork identifications
is under the control of the administering authority for the
private domain, except that a value of "99999" is reserved to
indicate that the subnetwork is not explicitly identified.
The length of the subnetwork address may be up to fifteen
decimal digits, and is determined by the DSP length minus eight
decimal digits.
The NSAP selector occupies three decimal digits.
7.5 E.164 DSP format guidelines
Description of Binary syntax
The length of the DSP can be determined since the total address
length is known, and the IDP has fixed length for any given AFI
value. If DSP is present, a DSP of 2 or less octets is an NSAP
selector. A DSP between 3 and 9 octets is interpreted in the
manner described below. Interpretation of a DSP greater than 9
octets in length is not specified in this report.
The length of the subnetwork identification is fixed at two
octets (16 bits). The assignment of subnetwork identifications
is under the control of the administering authority for the
private domain, except that the value with both octets hex "FF"
is reserved to indicate that the subnetwork is not explicitly
identified.
The length of the subnetwork address may be up to six octets,
and is determined by the DSP length minus three octets. For
subnetworks using DIS 8802 MAC addressing, this field consists
of the octets of the MAC address in the same order as they are
defined in DIS 8802.
ANSI [Page 9]
RFC 982 April 1986
ANSI Guidelines
The NSAP selector occupies a single octet.
Description of Decimal syntax
The length of the DSP can be determined since the total address
length is known, and the IDP has fixed length for any given AFI
value. If DSP is present, a DSP of 8 or less decimal digits is
an NSAP selector. A DSP between 8 and 23 decimal digits is
interpreted in the manner described below. Interpretation of a
DSP greater than 23 decimal digits in length is not specified
in this report.
The length of the subnetwork identification is fixed at five
decimal digits. The assignment of subnetwork identifications
is under the control of the administering authority for the
private domain, except that a value of "99999" is reserved to
indicate that the subnetwork is not explicitly identified.
The length of the subnetwork address may be up to fifteen
decimal digits, and is determined by the DSP length minus eight
decimal digits.
The NSAP selector occupies three decimal digits.
7.6 ISO 6523-ICD DSP format guidelines
Description of Binary syntax
The length of the DSP can be determined since the total address
length is known, and the IDP has fixed length for any given AFI
value. The length of the DSP is between 5 and 11 octets.
The first two octets identify an organization which has been
designated as an addressing authority. This authority is
responsible for assigning values to the remainder of the DSP.
The length of the subnetwork identification is fixed at two
octets (16 bits). The assignment of subnetwork identifications
is under the control of the administering authority for the
private domain, except that the value with both octets hex "FF"
is reserved to indicate that the subnetwork is not explicitly
identified.
The length of the subnetwork address may be up to six octets,
and is determined by the DSP length minus three octets. For
ANSI [Page 10]
RFC 982 April 1986
ANSI Guidelines
subnetworks using DIS 8802 MAC addressing, this field consists
of the octets of the MAC address in the same order as they are
defined in DIS 8802.
The NSAP selector occupies a single octet.
Description of Decimal syntax
The length of the DSP can be determined since the total address
length is known, and the IDP has fixed length for any given AFI
value. The length of the DSP is between 12 and 27 decimal
digits.
The first four digits identify an organization which has been
designated as an addressing authority. This authority is
responsible for assigning values to the remainder of the DSP.
The length of the subnetwork identification is fixed at five
decimal digits. The assignment of subnetwork identifications
is under the control of the administering authority for the
private domain, except that a value of "99999" is reserved to
indicate that the subnetwork is not explicitly identified.
The length of the subnetwork address may be up to fifteen
decimal digits, and is determined by the DSP length minus eight
decimal digits.
The NSAP selector occupies three decimal digits.
7.7 Local DSP format guidelines
No recommendations made.
ANSI [Page 11]
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