📄 rfc3033.txt
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The Identifier type field is the Session (0x01).
The Identifier length is 37 octets.
The Source IPv6 address, Destination IPv6 address, Protocol, Source
Port, and Destination Port [8, 9, 10] are assigned in that order to
the Identifier value field.
Note: This specific session identifier is intended for use only with
the explicit reservation. If wild card associations are needed at a
later date, another identifier type will be used.
Suzuki Standards Track [Page 13]
RFC 3033 GIT and UUS Assignment for IP January 2001
4.1.4 MPLS VCID
If the Identifier related standard/application field in the Generic
Identifier information element is the MPLS, and the Identifier type
field in the identifier is the Resource, the identifier is the MPLS
VCID. The format of the MPLS VCID is shown in Fig. 4.4.
Bits Octet
8 7 6 5 4 3 2 1 length
+-----+-----+-----+-----+-----+-----+-----+-----+
| Identifier type |
| = Resource (0x02) | 1
+-----+-----+-----+-----+-----+-----+-----+-----+
| Identifier length |
| = 4 octets (0x04) | 1
+-----+-----+-----+-----+-----+-----+-----+-----+
| MPLS VCID | 4
+-----+-----+-----+-----+-----+-----+-----+-----+
Fig. 4.4: MPLS VCID.
The Identifier type field is the Resource (0x02).
The Identifier length is 4 octets.
The MPLS VCID [13] is assigned to the Identifier value field.
4.1.5 Experiment/Organization specific
If the Identifier related standard/application field in the Generic
Identifier information element is the IPv4, ST2+, IPv6, or MPLS, and
the Identifier type field in the identifier is the
Experiment/Organization specific, the identifier is the
Experiment/Organization specific. The format of the
Experiment/Organization specific is shown in Fig. 4.5.
Suzuki Standards Track [Page 14]
RFC 3033 GIT and UUS Assignment for IP January 2001
Bits Octet
8 7 6 5 4 3 2 1 length
+-----+-----+-----+-----+-----+-----+-----+-----+
| Identifier type |
| = Experiment/Organization specific (0xFE) | 1
+-----+-----+-----+-----+-----+-----+-----+-----+
| Identifier length | 1
+-----+-----+-----+-----+-----+-----+-----+-----+
| Organizationally unique identifier (OUI) | 3
+-----+-----+-----+-----+-----+-----+-----+-----+
| Experiment/Organization specific info. |
= =
| |
+-----+-----+-----+-----+-----+-----+-----+-----+
Fig. 4.5: Experiment/Organization specific.
The Identifier type field is the Experiment/Organization specific
(0xFE).
The first 3 octets in the Identifier value field must contain the
Organizationally unique identifier (OUI) (as specified in IEEE 802-
1990; section 5.1).
4.2 Assignment in the User-user Information Element
4.2.1 Use of User-to-user Signaling
The information field and protocol identifier assignment principle
for the Internet protocol in the User-user information element is
shown in Fig. 4.6.
Suzuki Standards Track [Page 15]
RFC 3033 GIT and UUS Assignment for IP January 2001
Bits
8 7 6 5 4 3 2 1 Octets
+-----+-----+-----+-----+-----+-----+-----+-----+
| Information element identifier |
| = User-user information element (0x7E) | 1
+-----+-----+-----+-----+-----+-----+-----+-----+
| 1 | Coding | IE instruction field |
| Ext | standard |Flag |Res. | IE action ind. | 2
+-----+-----+-----+-----+-----+-----+-----+-----+
| Length of contents of information element | 3-4
+-----+-----+-----+-----+-----+-----+-----+-----+
| Protocol discriminator |
| = Internet protocol/application (0x06) | 5
+-----+-----+-----+-----+-----+-----+-----+-----+
| Internet protocol/application identifier | 6
+-----+-----+-----+-----+-----+-----+-----+-----+
| Internet protocol/application related info. | 7-
= =
| |
+-----+-----+-----+-----+-----+-----+-----+-----+
Fig. 4.6: Principle of assignment in the User-user information
element.
The Protocol discriminator field is the Internet protocol/application
(0x06). In this case, the first 1 octet in the User information
field is the Internet protocol/application identifier field.
Assignment of the Internet protocol/application identifier field is
as follows. A leading 0x means hexadecimal.
0x00: Reserved.
0x01: Reserved for ST2+.
0x02: RSVP message.
0x03-0xFD: Reserved for IANA assignment.
0xFE: Experiment/Organization specific.
0xFF: Reserved.
The field that follows the Internet protocol/application identifier
field is assigned to Internet protocol/application related
information that is identified by the Internet protocol/application
identifier field.
Suzuki Standards Track [Page 16]
RFC 3033 GIT and UUS Assignment for IP January 2001
When a B-ISDN signaling message containing a User-user information
element enters an ATM network that does not support the User-to-user
Signaling, the network clears the call, discards the information
element, or discards the signaling message. (See sections 4.5.1 and
5.6.8.1 of Q.2931, section 1.9 of Q.2957, and Q.2971 annex D for
details.)
To enable reliable User-user information element transfer, when the
calling party sends a SETUP or ADD PARTY message with a User-user
information element, the CONNECT or ADD PARTY ACK message returned by
the called party must contain a User-user information element. The
called party may not respond with the same user information received
from the calling party. The calling party should confirm that the
response message contains a User-user information element. This rule
enables negotiation; this document does not specify the detailed
procedure of this negotiation.
4.2.2 RSVP message
The format of the RSVP message is shown in Fig. 4.7.
Bits
8 7 6 5 4 3 2 1 Octets
+-----+-----+-----+-----+-----+-----+-----+-----+
| Information element identifier |
| = User-user information element (0x7E) | 1
+-----+-----+-----+-----+-----+-----+-----+-----+
| 1 | Coding | IE instruction field |
| Ext | standard |Flag |Res. | IE action ind. | 2
+-----+-----+-----+-----+-----+-----+-----+-----+
| Length of contents of information element | 3-4
+-----+-----+-----+-----+-----+-----+-----+-----+
| Protocol discriminator |
| = Internet protocol/application (0x06) | 5
+-----+-----+-----+-----+-----+-----+-----+-----+
| Internet protocol/application identifier |
| = RSVP message (0x02) | 6
+-----+-----+-----+-----+-----+-----+-----+-----+
| RSVP message | 7-
= =
| |
+-----+-----+-----+-----+-----+-----+-----+-----+
Fig. 4.7: RSVP message.
The Internet protocol/application identifier field is the RSVP
message (0x02).
Suzuki Standards Track [Page 17]
RFC 3033 GIT and UUS Assignment for IP January 2001
The RSVP message [12] is assigned to the Internet
protocol/application related information field. The SETUP message
may contain the RSVP Resv message. The CONNECT message may contain
the RSVP ResvConf message. The RELEASE message may contain the RSVP
ResvErr or ResvTear message.
4.2.3 Experiment/Organization specific
The format of the Experiment/Organization specific is shown in Fig.
4.8.
Bits
8 7 6 5 4 3 2 1 Octets
+-----+-----+-----+-----+-----+-----+-----+-----+
| Information element identifier |
| = User-user information element (0x7E) | 1
+-----+-----+-----+-----+-----+-----+-----+-----+
| 1 | Coding | IE instruction field |
| Ext | standard |Flag |Res. | IE action ind. | 2
+-----+-----+-----+-----+-----+-----+-----+-----+
| Length of contents of information element | 3-4
+-----+-----+-----+-----+-----+-----+-----+-----+
| Protocol discriminator |
| = Internet protocol/application (0x06) | 5
+-----+-----+-----+-----+-----+-----+-----+-----+
| Internet protocol/application identifier |
| = Experiment/Organization specific (0xFE) | 6
+-----+-----+-----+-----+-----+-----+-----+-----+
| Organizationally unique identifier (OUI) | 7-9
+-----+-----+-----+-----+-----+-----+-----+-----+
| Experiment/Organization specific info. | 10-
= =
| |
+-----+-----+-----+-----+-----+-----+-----+-----+
Fig. 4.8: Experiment/Organization specific.
The Internet protocol/application identifier field is the
Experiment/Organization specific (0xFE).
The first 3 octets in the Internet protocol/application related
information field must contain the Organizationally unique identifier
(OUI) (as specified in IEEE 802-1990; section 5.1).
5. Open Issues
The following issues are still remain in this document.
Suzuki Standards Track [Page 18]
RFC 3033 GIT and UUS Assignment for IP January 2001
o Generic Identifier support for session aggregation.
Session aggregation support may be needed in a backbone
environment. Wild card style aggregated session identifier may be
feasible. However, before specifying Generic Identifier support
for it, session aggregation model in ATM VCs should be clarified.
o Generic Identifier support for the IPv6 flow label and traffic
classes.
The IPv6 flow label and traffic classes support may be needed in
future. However, currently their semantics are not clear.
6. IANA Considerations
When the Identifier related standard/application field in the
Q.2941.2 Generic Identifier information element is the IPv4, ST2+,
IPv6, or MPLS, numbers between 0x10-0xFD in the Identifier type field
are reserved for IANA assignment. (See section 3.1.) Following the
policies outlined in [14], these numbers are allocated through an
IETF Consensus action.
When the Protocol discriminator field in the Q.2957 User-user
information element is the Internet protocol/application, numbers
between 0x03-0xFD in the Internet protocol/application identifier
field are reserved for IANA assignment. (See section 4.2.1.)
Following the policies outlined in [14], these numbers are allocated
through an IETF Consensus action.
7. Security Considerations
This document specifies the information field and protocol identifier
assignment in the Q.2941 Generic Identifier and Q.2957 User-to-user
Signaling for the Internet protocol, so these do not weaken the
security of the B-ISDN signaling.
In a called party of the B-ISDN signaling, if the incoming SETUP
message contains the calling party number and if it is verified and
passed by the ATM network or it is provided by the network, then it
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