📄 rfc2331.txt
字号:
| Tagging | Y/N | N | N ||--------------------|---------------|---------------|---------------|| Frame Discard | Y/N | Y/N | Y/N ||--------------------|---------------|---------------|---------------|| QoS Classes | * | * | * ||--------------------|---------------|---------------|---------------|| Transit Delay(nt.2)| O | O | O ||--------------------|---------------|---------------|---------------|| Peak-to-Peak CDV | O | O | O ||--------------------|---------------|---------------|---------------|| CLR (CLP=0)~ | O | O | O ||--------------------|---------------|---------------|---------------|| CLR (CLP=0+1)~ | | | |+--------------------------------------------------------------------+Maher Standards Track [Page 20] RFC 2331 IP over ATM Signalling - SIG 4.0 Update April 1998+--------------------------------------------------------------------+|ATM Service Category| Non-Real Time VBR ||--------------------|---------------|---------------|---------------|| Conformance |VBR.1 (note 10)| VBR.2 | VBR.3 ||--------------------|---------------|---------------|---------------|| Bearer Capability | | | ||--------------------|---------------|---------------|---------------|| BB Bearer Class | C | X | VP |C | X | VP|C | X | VP||--------------------|---------------|--|--------|---|--|--------|---|| ATM Transfer | | |abs,0,2,|abs| |abs,0,2,|abs|| Capability | 11 |ab| 8,10 |10 |ab| 8,10 |10 ||--------------------|---------------|---------------|---------------|| Traffic Descriptor | | | || for a given dir. | | | ||--------------------|---------------|---------------|---------------|| PCR (CLP=0) | | | ||--------------------|---------------|---------------|---------------|| PCR (CLP=0+1) | S | S | S ||--------------------|---------------|---------------|---------------|| SCR, MBS (CLP=0) | | S | S ||--------------------|---------------|---------------|---------------|| SCR, MBS (CLP=0+1) | S | | ||--------------------|---------------|---------------|---------------|| Best Effort | | | ||--------------------|---------------|---------------|---------------|| Tagging | N | N | Y ||--------------------|---------------|---------------|---------------|| Frame Discard | Y/N | Y/N | Y/N ||--------------------|---------------|---------------|---------------|| QoS Classes | * | * | * ||--------------------|---------------|---------------|---------------|| Transit Delay(nt.2)| (note 3) | (note 3) | (note 3) ||--------------------|---------------|---------------|---------------|| Peak-to-Peak CDV | | | ||--------------------|---------------|---------------|---------------|| CLR (CLP=0)~ | | O | O ||--------------------|---------------|---------------|---------------|| CLR (CLP=0+1)~ | O | | |+--------------------------------------------------------------------+Maher Standards Track [Page 21] RFC 2331 IP over ATM Signalling - SIG 4.0 Update April 1998+--------------------------------------------------------------------+|ATM Service Category| Non-Real Time VBR ||--------------------|---------------|---------------|---------------|| Conformance | (note 4,7) | (note 4,8) | (note 4) ||--------------------|---------------|---------------|---------------|| Bearer Capability | | | ||--------------------|---------------|---------------|---------------|| BB Bearer Class | C | X | C | X |C | X |VP^||--------------------|-------|-------|-------|-------|--|--------|---|| ATM Transfer | |abs,0,2| |abs,0,2| |abs,0,2,|abs|| Capability | abs |8 or 10| |8 or 10|ab| 8 or10 |10 ||--------------------|---------------|---------------|---------------|| Traffic Descriptor | | | || for a given dir. | | | ||--------------------|---------------|---------------|---------------|| PCR (CLP=0) | S | | ||--------------------|---------------|---------------|---------------|| PCR (CLP=0+1) | S | S | S ||--------------------|---------------|---------------|---------------|| SCR, MBS (CLP=0) | | | ||--------------------|---------------|---------------|---------------|| SCR, MBS (CLP=0+1) | | | S ||--------------------|---------------|---------------|---------------|| Best Effort | | | ||--------------------|---------------|---------------|---------------|| Tagging | Y/N | N | N ||--------------------|---------------|---------------|---------------|| Frame Discard | Y/N | Y/N | Y/N ||--------------------|---------------|---------------|---------------|| QoS Classes | * | * | * ||--------------------|---------------|---------------|---------------|| Transit Delay(nt.2)| (note 3) | (note 3) | (note 3) ||--------------------|---------------|---------------|---------------|| Peak-to-Peak CDV | | | ||--------------------|---------------|---------------|---------------|| CLR (CLP=0)~ | O | O | O ||--------------------|---------------|---------------|---------------|| CLR (CLP=0+1)~ | | | |+--------------------------------------------------------------------+Maher Standards Track [Page 22] RFC 2331 IP over ATM Signalling - SIG 4.0 Update April 1998+--------------------------------------------------------------------+|ATM Service Category| ABR | UBR ||--------------------|---------------|---------------|---------------|| Conformance | ABR | UBR.1 | UBR.2 ||--------------------|---------------|---------------|---------------|| Bearer Capability | | | ||--------------------|---------------|---------------|---------------|| BB Bearer Class | C | X | VP |C | X | VP|C | X | VP||--------------------|---------------|--|--------|---|--|--------|---|| ATM Transfer | | |abs,0,2,|abs| |abs,0,2,|abs|| Capability | 12 |ab| 8,10 |10 |ab| 8,10 |10 ||--------------------|---------------|---------------|---------------|| Traffic Descriptor | | | || for a given dir. | | | ||--------------------|---------------|---------------|---------------|| PCR (CLP=0) | | | ||--------------------|---------------|---------------|---------------|| PCR (CLP=0+1) | S | S | S ||--------------------|---------------|---------------|---------------|| SCR, MBS (CLP=0) | | S | S ||--------------------|---------------|---------------|---------------|| SCR, MBS (CLP=0+1) | S | | ||--------------------|---------------|---------------|---------------|| ABR MCR | (note 6) | | ||--------------------|---------------|---------------|---------------|| Best Effort | | S (note 9) | S (note 9) ||--------------------|---------------|---------------|---------------|| Tagging | N | N | N ||--------------------|---------------|---------------|---------------|| Frame Discard | Y/N | Y/N | Y/N ||--------------------|---------------|---------------|---------------|| QoS Classes | 0 | 0 | 0 ||--------------------|---------------|---------------|---------------|| Transit Delay(nt.2)| | | ||--------------------|---------------|---------------|---------------|| Peak-to-Peak CDV | | | ||--------------------|---------------|---------------|---------------|| CLR (CLP=0)~ | | | ||--------------------|---------------|---------------|---------------|| CLR (CLP=0+1)~ | | | |+--------------------------------------------------------------------+ ab, abs = absent. Y/N = either "Yes" or "No" is allowed.Maher Standards Track [Page 23] RFC 2331 IP over ATM Signalling - SIG 4.0 Update April 1998 O = Optional. May be specified using: - an additional QoS parameter encoded i the Extended QoS parameters information element or the end-to-end transit information element; or, - objectives implied from the QoS class If an Extended QoS Parameters IE is not present in the message, then any value of this parameter is acceptable. If neither the parameter nor the Extended QoS Parameters IE is present, then the objective for this parameter is determined from the QoS class in the QoS Parameter IE. S = Specified. (blank) = Unspecified. * = allowed QoS class values are a network option. Class 0 is always for alignment with ITU-T. ^ = (note 5). ~ = (note 11). Note 1 - Values 0,1,2,4,6, and 8 are not used on transmission but shall be understood on reception. Note 2 - Maximum end-2-end transit delay objectives may only be specified for the forward direction. Note 3 - Maximum end-2-end transit delay objectives may be specified for the ATM Service Category of Non-real Time VBR for reasons of backward compatibility with ITU-T Recommendations. Note 4 - Included for reasons of backward compatibility with UNI 3.1and ITU-T Recommendations. With these conformance definitions, the CLR commitment is only for the CLP=0 traffic stream. Note 5 - Included to allow switched virtual paths to use the UNI 3.1 conformance definitions. Note 6 - Optional in the user-to-network direction. Specified in the network-to-user direction.Maher Standards Track [Page 24] RFC 2331 IP over ATM Signalling - SIG 4.0 Update April 1998 Note 7 - This combination should be treated as if the received PCR (CLP=0) parameter were a SCR (CLP=0) parameter and a MBS (CLP=0) parameter with a value of 1. Note 8 - This combination should be treated as if an additional SCR (CLP=0) parameter were received with the same value as a PCR (CLP=0+1) parameter and a MBS (CLP=0) parameter with a value of 1. Note 9 - The best effort parameter applies to both the forward and backward directions. Note 10 - This combination should only be used when the CLR commitment on CLP=0+1 is required versus CLR commitment on CLP=0 traffic, since these combinations are not supported by UNI 3.0/3.1 nor ITU-T Q.2931. Note 11 - In this table the CLR commitment is shown as two entries to indicated explicitly whether the CLR commitment is for the CLP=0 or the CLP=0+1 cells.Maher Standards Track [Page 25] RFC 2331 IP over ATM Signalling - SIG 4.0 Update April 1998Full Copyright Statement Copyright (C) The Internet Society (1998). 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.Maher Standards Track [Page 26] ⌨️ 快捷键说明
复制代码
Ctrl + C
搜索代码
Ctrl + F
全屏模式
F11
切换主题
Ctrl + Shift + D
显示快捷键
?
增大字号
Ctrl + =
减小字号
Ctrl + -