diff options
Diffstat (limited to 'doc/rfc/rfc3134.txt')
| -rw-r--r-- | doc/rfc/rfc3134.txt | 899 |
1 files changed, 899 insertions, 0 deletions
diff --git a/doc/rfc/rfc3134.txt b/doc/rfc/rfc3134.txt new file mode 100644 index 0000000..aeff87b --- /dev/null +++ b/doc/rfc/rfc3134.txt @@ -0,0 +1,899 @@ + + + + + + +Network Working Group J. Dunn +Request for Comments: 3134 C. Martin +Category: Informational ANC, Inc. + June 2001 + + + Terminology for ATM ABR Benchmarking + +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 (2001). All Rights Reserved. + +Abstract + + This memo discusses and defines terms associated with performance + benchmarking tests and the results of these tests in the context of + Asynchronous Transfer Mode (ATM) based switching devices supporting + ABR (Available Bit Rate). The terms defined in this memo will be + used in addition to terms defined in RFCs 1242, 2285, and 2544 and + 2761. This memo is a product of the Benchmarking Methodology Working + Group (BMWG) of the Internet Engineering Task Force (IETF). + +1. Introduction + + This document provides terminology for benchmarking ATM based + switching devices supporting ABR. It extends terminology already + defined for benchmarking network interconnect devices in RFC's 1242, + 2285, and 2544 and 2761. Although some of the definitions in this + memo may be applicable to a broader group of network interconnect + devices, the primary focus of the terminology in this memo is on ATM + ABR. + + This memo contains two major sections: Background and Definitions. + The background section provides the reader with an overview of the + technology and IETF formalisms. The definitions section is split + into two sub-sections. The formal definitions sub-section is + provided as a courtesy to the reader. The measurement definitions + sub-section contains performance metrics with inherent units. + + This document assumes that necessary services are available and + active. For example, IP connectivity requires SSCOP connectivity + between signaling entities. Further, it is assumed that the SUT has + + + +Dunn & Martin Informational [Page 1] + +RFC 3134 Terminology for ATM ABR Benchmarking June 2001 + + + the ability to configure ATM addresses (via hard coded addresses, + ILMI or PNNI neighbor discovery), has the ability to run SSCOP, and + has the ability to perform signaled call setups (via UNI or PNNI + signaling). Finally, this document presents only the terminology + associated with benchmarking IP performance over ATM; therefore, it + does not represent a total compilation of ATM test terminology. + + The BMWG produces two major classes of documents: Benchmarking + Terminology documents and Benchmarking Methodology documents. The + Terminology documents present the benchmarks and other related terms. + The Methodology documents define the procedures required to collect + the benchmarks cited in the corresponding Terminology documents. + +2. Existing Definitions. + + RFC 1242, "Benchmarking Terminology for Network Interconnect + Devices", should be consulted before attempting to make use of this + document. RFC 2544, "Benchmarking Methodology for Network + Interconnect Devices", contains discussions of a number of terms + relevant to the benchmarking of switching devices and should be + consulted. RFC 2285, "Benchmarking Terminology for LAN Switching + Devices", contains a number of terms pertaining to traffic + distributions and datagram interarrival. RFC 2761, "Terminology for + ATM Benchmarking", contains a number terms pertaining to traffic + management [TM4.0, TM4.1]. Many of the metrics defined in RFC 2761 + (e.g., CDV, CER, CLR, CMR, and CTD) also apply to ABR performance + benchmarking. These metrics will not be redefined in this document. + For the sake of clarity and continuity, this RFC adopts the template + for definitions set out in Section 2 of RFC 1242. + +II. Definitions + + The definitions presented in this section have been divided into two + groups. The first group is formal definitions, which are required in + the definitions of the performance metrics but are not themselves + strictly metrics. These definitions are subsumed from other work + done in other working groups both inside and outside the IETF. They + are provided as a courtesy to the reader. + +1. Formal Definitions + +1.1. Definition Format (from RFC 1242) + + Term to be defined. + + Definition: The specific definition for the term. + + + + + +Dunn & Martin Informational [Page 2] + +RFC 3134 Terminology for ATM ABR Benchmarking June 2001 + + + Discussion: A brief discussion of the term, its application and any + restrictions on measurement procedures. + + Specification: The working group and document in which the terms are + specified and are listed in the references section. + +1.2. Related Definitions. + +1.2.1. Allowed Cell Rate (ACR) + + Definition: An ABR service parameter, ACR is the current rate + (cells/second) at which a source is allowed to send. + + Discussion: For ABR traffic, ACR constitutes the actual data + throughput for a particular VC. The time change of this value + effects TCP round trip time calculations, which in turn effects TCP + throughput. + + Specification: AF-TM4.0 + +1.2.2. ACR Decrease Time Factor (ADTF) + + Definition: This is the time permitted between sending RM-cells + before the rate is decreased to ICR (Initial Cell Rate). The time + units are .01 to 10.23 seconds with a granularity of 10 ms. + + Discussion: For ABR traffic, ADTF constitutes the time rate of the + ACR. This value effects TCP round trip time calculations, which in + turn effects TCP throughput. + + Specification: AF-TM4.0 + +1.2.3. Additive Increase Rate (AIR) + + Definition: An ABR service parameter, AIR controls the rate at which + the cell transmission rate increases. It is signaled as AIRF, where + + AIRF = AIR*Nrm/PCR. + + Discussion: For ABR traffic, AIR effects the time rate of change of + the ACR. This value effects TCP round trip time calculations, which + in turn effects TCP throughput. + + Specification: AF-TM4.0 + +1.2.4. Additive Increase Rate Factor (AIRF) + + Definition: Refer to AIR. + + + +Dunn & Martin Informational [Page 3] + +RFC 3134 Terminology for ATM ABR Benchmarking June 2001 + + + Discussion: Refer to AIR. + + Specification: AF-TM4.0 + +1.2.5. Available Bit Rate (ABR) + + Definition: ABR is an ATM layer service category for which the + limiting ATM layer transfer characteristics provided by the network + may change subsequent to connection establishment. A flow control + mechanism is specified which supports several types of feedback to + control the source rate in response to changing ATM layer transfer + characteristics. + + Discussion: It is expected that an end-system that adapts its traffic + in accordance with the feedback will experience a low cell loss ratio + and obtain a fair share of the available bandwidth according to a + network specific allocation policy. Cell delay variation is not + controlled in this service, although admitted cells are not delayed + unnecessarily. + + Specification: AF-TM4.1 + +1.2.6. Available Bit Rate (ABR) Compliance (Conformance) + + Definition: ABR connection conformance refers to the behavior + specified for ABR destination and switches, but allows for delays + between the source and the UNI [UNI3.1, UNI4.0], which may perturb + the traffic flow. + + Discussion: The cells on an ABR connection applies to CLP=0 cells, + which are tested upon arrival. At the arrival point, each cell is + identified as conforming or non-conforming. The minimal conformance + definition for ABR is GCRA((1/PCR),t1), where PCR is defined for + CLP=0 flow. + + Specification: AF-TM4.1 + +1.2.7. BN + + Definition: The BN bit in the RM-cell indicated whether the RM-cell + is a BECN cell or not. + + Discussion: If BN=0, the RM cells were generated by the source. If + BN=1, the RM cells were generated by the destination or a switch. + + Specification: AF-TM4.1 + + + + + +Dunn & Martin Informational [Page 4] + +RFC 3134 Terminology for ATM ABR Benchmarking June 2001 + + +1.2.8. CCR + + Definition: The CCR field in the RM-cell is set by the source to its + current ACR. CCR is formatted as a rate. + + Discussion: For BECN cells, CCR=0. + + Specification: AF-TM4.1 + +1.2.9. Cell Blocks (CB) + + Definition: Cell blocks are a sequence of N cells transmitted + consecutively on a given connection. + + Discussion: A cell block will normally correspond to the number of + information cells transmitted between successive OAM cells. + + Specification: AF-TM4.1 + +1.2.10. Congestion Indication (CI) + + Definition: The CI bit in the RM-cell allows a network element to + indicate that there is congestion in the network. + + Discussion: When the source receives a backward RM-cell with CI=1, + ACR is decreased. When the destination turns around a forward RM- + cell, the CI is set to 1 to indicate that the previously received + data cell had the EFCI state set. + + Specification: AF-TM4.1 + +1.2.11. Cutoff Decrease Factor (CDF) + + Definition: CDF controls the decrease in ACR (Allowed Cell Rate) + associated with CRM (missing RM cell count). + + Discussion: For ABR traffic, CDF effects the time rate of change of + the ACR. This value effects TCP round trip time calculations, which + in turn effects TCP throughput. + + Specification: AF-TM4.0 + + + + + + + + + + +Dunn & Martin Informational [Page 5] + +RFC 3134 Terminology for ATM ABR Benchmarking June 2001 + + +1.2.12. DIR + + Definition: The DIR bit in the RM-cell indicates which direction of + data flow is associated with the RM-cell. DIR is changed from 0 to 1 + when an RM-cell is turned around at the destination. + + Discussion: A forward RM-cell is indicated by DIR=0 and is associated + with data cells flowing in the same direction. A backward RM-cell is + indicated by DIR=1 and is associated with data cells flowing in the + opposite direction. + + Specification: AF-TM4.1 + +1.2.13. Explicit Rate (ER) + + Definition: The ER field in the RM-cell is used to limit the source + ACR to a specific value. For each RM-cell, ER is set by the source + to a requested rate (e.g., PCR). It may be reduced by any network + element in the path to a value that the element can sustain. ER is + formatted as a rate. + + Discussion: None. + + Specification: AF-TM4.1 + +1.2.14. Feedback + + Definition: Information carried in the backward RM-cells provided by + the network elements and/or the destination back to the source. + + Discussion: Feedback may include information in the ER field, or the + CI or NI bits of each backward RM-cell. + + Specification: AF-TM4.1 + +1.2.15. Ideal Transmission Time (ITT) + + Definition: The transmission time for ABR CLP=0 cells, if the + difference between itself and the transmission time for the previous + CLP=0 cell on the connection is greater than or equal to the minimum: + a) the inverse of the ACR in effect immediately after the + transmission time of the first of the two cells b) the inverse of the + ACR in effect immediately before the transmission time of the second + of the two cells. + + Discussion: The transmission time for the first cell on the + connection is automatically an ITT. + + + + +Dunn & Martin Informational [Page 6] + +RFC 3134 Terminology for ATM ABR Benchmarking June 2001 + + + Specification: AF-TM4.1 + +1.2.16. Initial Cell Rate (ICR) + + Definition: An ABR service parameter, in cells/sec, that is the rate + at which a source should send initially and after an idle period. + + Discussion: none. + + Specification: AF-TM4.0 + +1.2.17. In-Rate Cells + + Definition: In-Rate ABR cells are sent with CLP=0. + + Discussion: ABR RM-cells shall be sent with CLP=0 except in certain + circumstances, See Out-of-Rate Cells. All other ABR cells shall be + sent with CLP=0. + + Specification: AF-TM4.1 + +1.2.18. Minimum Cell Rate (MCR) + + Definition: An ABR service traffic descriptor, in cells/sec, that is + the rate at which the source is always allowed to send. + + Discussion: MCR may be set to zero. The bandwidth available from the + network may vary, but shall not become less than MCR. + + Specification: AF-TM4.1 + +1.2.19. Mrm + + Definition: An ABR service parameter that controls allocation of + bandwidth between forward W-cells, backward RM-cells, and data cells. + + Discussion: none. + + Specification: AF-TM4.0 + +1.2.20. No Increase (NI) + + Definition: The NI bit in the RM-cell is used to prevent a source + from increasing its ACR. NI does not require any decrease in value. + + Discussion: None. + + Specification: AF-TM4.0 + + + +Dunn & Martin Informational [Page 7] + +RFC 3134 Terminology for ATM ABR Benchmarking June 2001 + + +1.2.21. Nrm + + Definition: An ABR service parameter, Nrm is the maximum number of + cells a source may send for each forward RM-cell. + + Discussion: none. + + Specification: AF-TM4.0 + +1.2.22. Out-of-Rate Cells + + Definition: Out-of-Rate ABR cells are sent with CLP=1. + + Discussion: This may be used to enable a rate increase for a + connection that has an ACR=0. The source would generate out-of-rate + cells to probe the network to learn when it may increase its rate. + + Specification: AF-TM4.1 + +1.2.23. Rate Decrease Factor (RDF) + + Definition: An ABR service parameter, RDF controls the decrease in + the cell transmission rate. RDF is a power of 2 from 1/32,768 to 1. + + Discussion: For ABR traffic, RDF effects the time rate of change of + the ACR. This value effects TCP round trip time calculations, which + in turn effects TCP throughput. + + Specification: AF-TM4.0 + +1.2.24. Rate Increase Factor (RIF) + + Definition: This controls the amount by which the cell transmission + rate may increase upon receipt of a RM-cell. The additive increase + rate AIR=PCR*RIF. RIF is a power of 2, ranging from 1/32,768 to 1. + + Discussion: For ABR traffic, RIF effects the time rate of change of + the ACR. This value effects TCP round trip time calculations, which + in turn effects TCP throughput. + + Specification: AF-TM4.0 + +1.2.25. Resource Management (RM) Cells + + Definition: RM cells are used to convey network status (available + bandwidth, congestion levels) and request peak cell rates for ATM + blocks. The RM cell has the following format: + + + + +Dunn & Martin Informational [Page 8] + +RFC 3134 Terminology for ATM ABR Benchmarking June 2001 + + + Header: 5 bytes, same as the ATM cell header Protocol ID: 3 bytes, + protocol ID value is 1 for ABR service Function specific field: 45 + bytes, data required for the specific protocol (See DIR, BN, CI, NI, + ER, CCR, and MCR for field information.) Rsvd: 6 bytes, reserved for + future specification EDC: 10 bytes, CRC-10 error detection code + computed over the cell payload .ti6 (except the CRC-10 field) and + used to check for data corruption + + Discussion: RM information can exist at the VP and/or VC level. VP + level cells are identified with a VCI value of 6. VC level cells are + identified with a PT of 6. See DIR, BN, CI, NI, ER, CCR, and MCR for + additional protocol field information. + + Specification: AF-TM4.0 + +1.2.26. Severely Errored Cell Block (SECB) + + Definition: A severely cell block outcome occurs when more than M + errored cells, lost cells, or misinserted cell outcomes are observed + in a received cell block. + + Discussion: none. + + Specification: AF-TM4.1 + +1.2.27. Tagged Cell Rate (TCR) + + Definition: An ABR service parameter, TCR limits the rate at which a + source may send out-of-rate forward RM-cells. TCR is a constant + fixed at 10 cells/second. + + Discussion: none. + + Specification: AF-TM4.0 + +1.2.28. TDF + + Definition: An ABR service parameter, TDF controls the decrease in + ACR associated with TOF. TDF is signaled as TDFF, where TDF=TDFF/RDF + times the smallest power of 2 greater or equal to PCR. TDF is in + units of 1/seconds. + + Discussion: For ABR traffic, TDF effects the time rate of change of + the ACR. This value effects TCP round trip time calculations, which + in turn effects TCP throughput. + + Specification: AF-TM4.0 + + + + +Dunn & Martin Informational [Page 9] + +RFC 3134 Terminology for ATM ABR Benchmarking June 2001 + + +1.2.29. TDFF + + Definition: Refer to TDF. TDFF is either zero or a power of two in + the range 1/64 to 1 in units of 1 /cells. + + Discussion: Refer to TDF. + + Specification: AF-TM4.0 + + 1.2.30. Time Out Factor (TOF) + + Definition: An ABR service parameter, TOF controls the maximum time + permitted between sending forward RM-cells before a rate decrease is + required. It is signaled as TOFF where TOF=TOFF+1. TOFF is a power + of 2 in the range: 1/8 to 4,096. + + Discussion: For ABR traffic, TOF effects the time rate of change of + the ACR. This value effects TCP round trip time calculations, which + in turn effects TCP throughput. + + Specification: AF-TM4.0 + +1.2.31. Time Out Factor (TOFF) + + Definition: Refer to TOF. + + Discussion: none. + + Specification: AF-TM4.0 + +1.2.32. Trm + + Definition: An ABR service parameter that provides an upper bound on + the time between forward RM-cells for an active source. It is 100 + times a power of two with a range of 100*2-7 to 100*20 + + Discussion: For ABR traffic, Trm effects the time rate of change of + the ACR. This value effects TCP round trip time calculations, which + in turn effects TCP throughput. + + Specification: AF-TM4.0 + +1.2.33. Virtual Source/Virtual Destination (VSND) + + Definition: An ABR connection may be divided into two or more + separately controlled ABR segments. Each ABR control segment, except + the first, is sourced by a virtual source. A virtual source + implements the behavior of an ABR source endpoint. Backward RM-cells + + + +Dunn & Martin Informational [Page 10] + +RFC 3134 Terminology for ATM ABR Benchmarking June 2001 + + + received by a virtual source are removed from the connection. Each + ABR control segment, except the last, is terminated by a virtual + destination. A virtual destination assumes the behavior of an ABR + destination endpoint. Forward RM-cells received by a virtual + destination are turned around and not forwarded to the next segment + of the connection. + + Discussion: none. + + Specification: AF-TM4.0 + +1.2.34. Xrm Decrease Factor (XDM) + + Definition: An ABR service parameter, XDF controls the decrease in + ACR associated with Xrm. It is a power of two in range: [0, 1]. + + Discussion: For ABR traffic, XDM effects the time rate of change of + the ACR. This value effects TCP round trip time calculations, which + in turn effects TCP throughput. + + Specification: AF-TM4.0 + +1.2.35. Xrm + + Definition: An ABR service parameter, Xrm limits the number of + forward RM-cells which may be sent in the absence of received + backward PM-cells. The range is 0-255. + + Discussion: For ABR traffic, Xrm effects the time rate of change of + the ACR. This value effects TCP round trip time calculations, which + in turn effects TCP throughput. + + Specification: AF-TM4.0 + +2. Performance Metrics + +2.1. Definition Format (from RFC 1242) + + Metric to be defined. + + Definition: The specific definition for the metric. + + Discussion: A brief discussion of the metric, its application and any + restrictions on measurement procedures. + + Measurement units: Intrinsic units used to quantify this metric. + This includes subsidiary units; e.g., microseconds are acceptable if + the intrinsic unit is seconds. + + + +Dunn & Martin Informational [Page 11] + +RFC 3134 Terminology for ATM ABR Benchmarking June 2001 + + +2.2. Definitions + +2.2.1. ABR Rate Decrease Response Time (ARDRT) + + Definition: The amount of time required by the SUT to adjust its + transmission rate based on an ABR rate decrease request. + + Discussion: During the ARDRT, cells transmitted by the SUT may be + dropped by the network due to traffic policing. These dropped cells + may contain a portion of an IP datagram. This may cause IP and TCP + packet loss. + + Measurement Units: seconds + +2.2.2. ABR Rate Increase Response Time (ARIRT) + + Definition: The amount of time required by the SUT to adjust its + transmission rate based on an ABR rate increase request. + + Discussion: During the ARIRT, the SUT will not fully utilize the + available bandwidth. This will negatively impact IP and TCP + throughput. + + Measurement Units: seconds + +2.2.3. RM-Cell Delay Variation (RM-CDV) + + Definition: The variation in RM-cell transfer delay (RM-CTD) of RM- + cells associated with a given traffic load, orientation and + distribution, as well as an integration period. RM-CDV = max (RM- + CTD) - min (RM-CTD) where max and min indicate the maximum and + minimum over the integration period, respectively. + + Discussion: RM-CDV is a component of RM-cell transfer delay, induced + by buffering and RM-cell scheduling. + + RM-CDV effects the time required to notify the source of a change in + the condition of the network. This in turn effects TCP round trip + time calculations. Large values of RM-CDV will adversely effect TCP + throughput and cause SAR timeout. + + Measurement Units: seconds + +2.2.4. RM-Cell Error Ratio (RM-CER) + + Definition: The ratio of RM-cells with payload errors in a + transmission in relation to the total number of RM-cells sent in a + transmission associated with a given traffic load, orientation and + + + +Dunn & Martin Informational [Page 12] + +RFC 3134 Terminology for ATM ABR Benchmarking June 2001 + + + distribution, as well as an integration period. Note that errors + occurring in the RM-cell header will cause RM-cell loss at the ATM + layer. Note further that multiple errors in a payload will only be + counted as one cell payload error. + + RM-CER = RM-Cells with payload errors / Total RM-Cells Transmitted. + + Discussion: The measurement is taken over a time interval and is + desirable to be measured on an in-service circuit. RM-CER effects the + time required to notify the source of a change in the condition of + the network. This in turn effects TCP round trip time calculations. + Large values of RM-CER will adversely effect TCP throughput and cause + SAR timeout. + + Measurement Units: dimensionless. + +2.2.5. RM-Cell Loss Ratio (RM-CLR) + + Definition: The ratio of lost RM-cells in a transmission in relation + to the total RM-cells sent in a transmission associated with a given + traffic load, orientation and distribution, as well as an integration + period. + + RM-CLR = Lost RM-Cells / Total RM-Cells Transmitted. + + Discussion: The objective is to minimize RM-CLR. It is expressed as + an order of magnitude, having a range of 10^-1 to 10^-15 and + unspecified. + + RM-CLR effects the time required to notify the source of a change in + the condition of the network. This in turn effects TCP round trip + time calculations. Large values of RM-CLR will adversely effect TCP + throughput and cause SAR timeout. + + Measurement Units: dimensionless. + +2.2.6. RM-Cell Misinsertion Ratio (RM-CMR) + + Definition: The ratio of RM-cells received at an endpoint that were + not originally transmitted by the source end in relation to the total + number of RM-cells properly transmitted associated with a given + traffic load, orientation and distribution, as well as an integration + period. + + RM-CMR = Misinserted RM-Cells / Total RM-Cells Transmitted. + + + + + + +Dunn & Martin Informational [Page 13] + +RFC 3134 Terminology for ATM ABR Benchmarking June 2001 + + + Discussion: The measurement is taken over a time interval and is + desirable to be measured on an in-service circuit. + + RM-CMR effects the time required to notify the source of a change in + the condition of the network. This in turn effects TCP round trip + time calculations. Large values of RM-CMR will adversely effect TCP + throughput and cause SAR timeout. + + Measurement Units: dimensionless. + +2.2.7. RM-CRC Error Ratio + + Definition: The ratio of RM-cells received at an endpoint which + contain an invalid CRC in relation to the total number of RM-cells + properly transmitted associated with a given traffic load, + orientation and distribution, as well as an integration period. + + Discussion: RM-CRC errors cause ATM RM-cells to be lost. + + RM-CRC effects the time required to notify the source of a change in + the condition of the network. This in turn effects TCP round trip + time calculations. Large values of RM-CRC will adversely effect TCP + throughput and cause SAR timeout. + + Measurement Units: dimensionless + +2.2.8. RM-Cell Transfer Delay (RM-CTD) + + Definition: The elapsed time between a RM-cell exit event at the + measurement point 1 (e.g., at the source UNI) and the corresponding + RM-cell entry event at a measurement point 2 (e.g., the destination + UNI) for a particular connection. + + Discussion: The RM-cell transfer delay between two measurement points + is the sum of the total inter-ATM node transmission delay and the + total ATM node processing delay. This number is a constant and + should not adversely effect performance. + + Measurement units: seconds + +2.2.9. Severely Errored Cell Block Ratio (SECBR) + + Definition: The ratio of severely errored cell blocks in a + transmission in relation to the total cell blocks sent in a + transmission associated with a given traffic load, orientation and + distribution, as well as an integration period. + + SECBR = Severely Errored Cell Blocks/Total Transmitted Cell Blocks + + + +Dunn & Martin Informational [Page 14] + +RFC 3134 Terminology for ATM ABR Benchmarking June 2001 + + + Discussion: SECBR may cause the SUT to drop cells that may contain a + portion of an IP datagram. This may cause IP and TCP packet loss. + + Measurement Units: dimensionless. + +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. References + + [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, + af-tm-0121.000, March 1999. + + [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. + +5. 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. + 4214 Crest Place + Ellicott City, MD 21043 USA + + Phone: +1 (410) 750-1700 + EMail: Cynthia.E.Martin@worldnet.att.net + + + + + + + + +Dunn & Martin Informational [Page 15] + +RFC 3134 Terminology for ATM ABR Benchmarking June 2001 + + +Full Copyright Statement + + Copyright (C) The Internet Society (2001). All Rights Reserved. + + This document and translations of it may be copied and furnished to + others, and derivative works that comment on or otherwise explain it + or assist in its implementation may be prepared, copied, published + and distributed, in whole or in part, without restriction of any + kind, provided that the above copyright notice and this paragraph are + included on all such copies and derivative works. However, this + document itself may not be modified in any way, such as by removing + the copyright notice or references to the Internet Society or other + Internet organizations, except as needed for the purpose of + developing Internet standards in which case the procedures for + copyrights defined in the Internet Standards process must be + followed, or as required to translate it into languages other than + English. + + The limited permissions granted above are perpetual and will not be + revoked by the Internet Society or its successors or assigns. + + This document and the information contained herein is provided on an + "AS IS" basis and THE INTERNET SOCIETY AND THE INTERNET ENGINEERING + TASK FORCE DISCLAIMS ALL WARRANTIES, EXPRESS OR IMPLIED, INCLUDING + BUT NOT LIMITED TO ANY WARRANTY THAT THE USE OF THE INFORMATION + HEREIN WILL NOT INFRINGE ANY RIGHTS OR ANY IMPLIED WARRANTIES OF + MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. + +Acknowledgement + + Funding for the RFC Editor function is currently provided by the + Internet Society. + + + + + + + + + + + + + + + + + + + +Dunn & Martin Informational [Page 16] + |