the Release Complete message being received.
Discussion: Large values of this measurement will adversely effect
performance in systems where the total number of open calls or VCs is
limited. Specifically, a new VC cannot be instantiated with the same
VPI/VCI before the old one is released.
Measurement Units: seconds
2.2.4.4. Crankback Time
Definition: The amount of time between the issuance of the first
release or release complete message by the switch where the current
Designated Transit List (DTL) is blocked and the receipt of the SETUP
with the updated DTLs by the target switch.
Discussion: This measurement does not take into account the amount of
time associated with either the successful portion of the call setup
transit or the time required for the calling party to receive .bp a
response from the called party. As a result, the call may still fail
to complete if the call setup timer on the calling party expires.
See discussion under SVC.
Measurement Units: seconds
2.2.4.5. Route Update Response Time
Definition: The amount of time between the receipt of a PNNI Topology
State Element (PTSE), which is the PNNI routing PDU, containing a
topology different from the current topology and the point at which
the switch begins to generate DTLs reflecting the routing change.
Discussion: This measurement provides a lower bound on the amount of
time during which SETUP messages will be forwarded along a sub-
optimal or blocked path.
Measurement Units: seconds
2.2.5. ATM Service: ILMI
2.2.5.1. MIB Alignment Time
Definition: The amount of time between the issuance of the final cold
start message and the final get response associated with the exchange
of static MIB information.
Discussion: This measurement reflects the amount of time required by
the switch and end system to exchange all information required to
characterize and align the capabilities of both systems. It does not
include address registration. It should also be noted that this
measurement will depend on the number of MIB elements implemented by
both systems.
Measurement Units: seconds
2.2.5.2. Address Registration Time
Definition: The amount of time between the initial set request issued
by the switch and the final get response issued by the switch.
Discussion: This measurement assumes that the switch has checked the
network prefix status object and the end system has checked the ATM
address status object. In the case where the end system checks the
ATM address status object only after the switch has issued a set
request of the network prefix status object, this measurement will
not reflect the actual time required to complete the address
registration.
Measurement Units: seconds
3. Security Considerations
As this document is solely for providing terminology and describes
neither a protocol nor an implementation, there are no security
considerations associated with this document.
4. Notices
The IETF takes no position regarding the validity or scope of any
intellectual property or other rights that might be claimed to
pertain to the implementation or use of the technology described in
this document or the extent to which any license under such rights
might or might not be available; neither does it represent that it
has made any effort to identify any such rights. Information on the
IETFs procedures with respect to rights in standards-track and
standards-related documentation can be found in BCP-11. Copies of
claims of rights made available for publication and any assurances of
licenses to be made available, or the result of an attempt made to
obtain a general license or permission for the use of such
proprietary rights by implementors or users of this specification can
be obtained from the IETF Secretariat.
The IETF invites any interested party to bring to its attention any
copyrights, patents or patent applications, or other proprietary
rights which may cover technology that may be required to practice
this standard. Please address the information to the IETF Executive
Director.
5. References
[AF-ILMI4.0] ATM Forum Integrated Local Management Interface
Version 4.0, af-ilmi-0065.000, September 1996.
[AF-TEST-0022] Introduction to ATM Forum Test Specifications, af-
test-0022.00, December 1994.
[AF-TM4.0] ATM Forum, Traffic Management Specification Version
4.0, af-tm-0056.00, April 1996.
[AF-TM4.1] ATM Forum, Traffic Management Specification Version
4.1 (final ballot), btd-tm-01.02, July 1998.
[AF-UNI3.1] ATM Forum, User Network Interface Specification
Version 3.1, September 1994.
[AF-UNI4.0] ATM Forum, User Network Interface Specification
Version 4.0, July 1996.
[I.321] ITU-T, B-ISDN protocol reference model and its
application, April 1991.
[I.363] ITU-T, B-ISDN ATM Adaptation Layer Specification
series, 1996-1997.
[I.363.5] ITU-T, B-ISDN ATM Adaptation Layer Specification: Type
5 AAL, August 1996.
6. Editors' Addresses
Jeffrey Dunn
Advanced Network Consultants, Inc.
4214 Crest Place
Ellicott City, MD 21043 USA
Phone: +1 (410) 750-1700
EMail: Jeffrey.Dunn@worldnet.att.net
Cynthia Martin
Advanced Network Consultants, Inc.
11241-B Skilift Court
Columbia, MD 21044 USA
Phone: +1 (410) 730-6300
EMail: Cynthia.E.Martin@worldnet.att.net
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