draft-ietf-ccamp-flexible-grid-ospf-ext-04.txt   draft-ietf-ccamp-flexible-grid-ospf-ext-05.txt 
CCAMP Working Group Xian Zhang CCAMP Working Group Xian Zhang
Internet-Draft Haomian Zheng Internet-Draft Haomian Zheng
Intended status: Standards Track Huawei Intended status: Standards Track Huawei
Ramon Casellas Ramon Casellas
CTTC CTTC
O. Gonzalez de Dios O. Gonzalez de Dios
Telefonica Telefonica
D. Ceccarelli D. Ceccarelli
Ericsson Ericsson
Expires: October 25, 2016 April 25, 2016 Expires: February 10, 2017 August 10, 2016
GMPLS OSPF-TE Extensions in support of Flexi-grid DWDM networks GMPLS OSPF-TE Extensions in support of Flexi-grid DWDM networks
draft-ietf-ccamp-flexible-grid-ospf-ext-04.txt draft-ietf-ccamp-flexible-grid-ospf-ext-05.txt
Abstract Abstract
This memo describes the OSPF-TE extensions in support of GMPLS This memo describes the OSPF-TE extensions in support of GMPLS
control of networks that include devices that use the new flexible control of networks that include devices that use the new flexible
optical grid. optical grid.
Status of this Memo Status of this Memo
This Internet-Draft is submitted to IETF in full conformance with This Internet-Draft is submitted to IETF in full conformance with
skipping to change at page 1, line 45 skipping to change at page 1, line 45
documents at any time. It is inappropriate to use Internet-Drafts documents at any time. It is inappropriate to use Internet-Drafts
as reference material or to cite them other than as "work in as reference material or to cite them other than as "work in
progress." progress."
The list of current Internet-Drafts can be accessed at The list of current Internet-Drafts can be accessed at
http://www.ietf.org/ietf/1id-abstracts.txt. http://www.ietf.org/ietf/1id-abstracts.txt.
The list of Internet-Draft Shadow Directories can be accessed at The list of Internet-Draft Shadow Directories can be accessed at
http://www.ietf.org/shadow.html. http://www.ietf.org/shadow.html.
This Internet-Draft will expire on October 25, 2016. This Internet-Draft will expire on February 10, 2017.
Copyright Notice Copyright Notice
Copyright (c) 2015 IETF Trust and the persons identified as the Copyright (c) 2015 IETF Trust and the persons identified as the
document authors. All rights reserved. document authors. All rights reserved.
This document is subject to BCP 78 and the IETF Trust's Legal This document is subject to BCP 78 and the IETF Trust's Legal
Provisions Relating to IETF Documents Provisions Relating to IETF Documents
(http://trustee.ietf.org/license-info) in effect on the date of (http://trustee.ietf.org/license-info) in effect on the date of
publication of this document. Please review these documents publication of this document. Please review these documents
carefully, as they describe your rights and restrictions with carefully, as they describe your rights and restrictions with
respect to this document. Code Components extracted from this respect to this document. Code Components extracted from this
document must include Simplified BSD License text as described in document must include Simplified BSD License text as described in
Section 4.e of the Trust Legal Provisions and are provided without Section 4.e of the Trust Legal Provisions and are provided without
warranty as described in the Simplified BSD License. warranty as described in the Simplified BSD License.
Table of Contents Table of Contents
1. Introduction ................................................ 2 1. Introduction ................................................. 2
2. Terminology ................................................. 3 2. Terminology .................................................. 3
2.1. Conventions Used in this Document....................... 3 2.1. Conventions Used in this Document ....................... 3
3. Requirements for Flexi-grid Routing.......................... 3 3. Requirements for Flexi-grid Routing .......................... 3
3.1. Available Frequency Ranges.............................. 4 3.1. Available Frequency Ranges .............................. 4
3.2. Application Compliance Considerations................... 5 3.2. Application Compliance Considerations ................... 5
3.3. Comparison with Fixed-grid DWDM Links................... 6 3.3. Comparison with Fixed-grid DWDM Links ................... 6
4. Extensions .................................................. 7 4. Extensions ................................................... 7
4.1. ISCD Extensions for Flexi-grid.......................... 7 4.1. ISCD Extensions for Flexi-grid .......................... 7
4.1.1. Switching Capability Specific Information (SCSI)....7 4.1.1. Switching Capability Specific Information (SCSI).... 8
4.1.2. An SCSI Example.................................... 9 4.1.2. An SCSI Example ................................... 10
4.2. Extensions to Port Label Restriction sub-TLV........... 12 4.2. Extensions to Port Label Restriction sub-TLV ........... 12
5. IANA Considerations ........................................ 13 5. IANA Considerations ......................................... 13
5.1. New Switching Type..................................... 13 5.1. New Switching Type ..................................... 13
5.2. New Sub-TLV ........................................... 13 5.2. New Sub-TLV ............................................ 13
6. Implementation Status....................................... 13 6. Implementation Status ....................................... 14
6.1. Centre Tecnologic de Telecomunicacions de Catalunya(CTTC)14 6.1. Centre Tecnologic de Telecomunicacions de Catalunya (CTTC)14
7. Acknowledgments ............................................ 15 7. Acknowledgments ............................................. 15
8. Security Considerations..................................... 15 8. Security Considerations ..................................... 15
9. Contributors' Addresses..................................... 15 9. Contributors' Addresses ..................................... 15
10. References ................................................ 16 10. References ................................................ 16
10.1. Normative References.................................. 16 10.1. Normative References .................................. 16
10.2. Informative References................................ 16 10.2. Informative References ................................ 16
Authors' Addresses ............................................ 17 Authors' Addresses ............................................ 17
1. Introduction 1. Introduction
[G.694.1] defines the Dense Wavelength Division Multiplexing (DWDM) [G.694.1] defines the Dense Wavelength Division Multiplexing (DWDM)
frequency grids for Wavelength Division Multiplexing (WDM) frequency grids for Wavelength Division Multiplexing (WDM)
applications. A frequency grid is a reference set of frequencies applications. A frequency grid is a reference set of frequencies
used to denote allowed nominal central frequencies that may be used used to denote allowed nominal central frequencies that may be used
for defining applications. The channel spacing is the frequency for defining applications. The channel spacing is the frequency
spacing between two allowed nominal central frequencies. All of the spacing between two allowed nominal central frequencies. All of the
wavelengths on a fiber should use different central frequencies and wavelengths on a fiber should use different central frequencies and
skipping to change at page 5, line 20 skipping to change at page 5, line 20
------------ ------------------------ ------------ ------------------------
^ ^ ^ ^
Central F = 193.1THz Central F = 193.1375 THz Central F = 193.1THz Central F = 193.1375 THz
Slot width = 25 GHz Slot width = 50 GHz Slot width = 25 GHz Slot width = 50 GHz
Figure 1 - Two Frequency Slots on a Link Figure 1 - Two Frequency Slots on a Link
Figure 1 shows two adjacent frequency slots on a link. The highest Figure 1 shows two adjacent frequency slots on a link. The highest
frequency of frequency slot 1 denoted by n=2 is the lowest frequency frequency of frequency slot 1 denoted by n=2 is the lowest frequency
of slot 2. In this example, it means that the frequency range from of slot 2. In this example, it means that the frequency range from
n=-2 to n=10 is occupied and is unavailable to other flexi-grid LSPs. n=-2 to n=10 is unavailable to other flexi-grid LSPs. Available
central frequencies are advertised for m=1, which means that for an
available central frequency n, the frequency slot from central
frequency n-1 to central frequency n+1 is available.
Hence, in order to clearly show which LSPs can be supported and what Hence, in order to clearly show which LSPs can be supported and what
frequency slots are unavailable, the available frequency ranges MUST frequency slots are unavailable, the available frequency ranges MUST
be advertised by the routing protocol for the flexi-grid DWDM links. be advertised by the routing protocol for the flexi-grid DWDM links.
A set of non-overlapping available frequency ranges MUST be A set of non-overlapping available frequency ranges MUST be
disseminated in order to allow efficient resource management of disseminated in order to allow efficient resource management of
flexi-grid DWDM links and RSA procedures which are described in flexi-grid DWDM links and RSA procedures which are described in
Section 4.8 of [RFC7698]. Section 4.8 of [RFC7698].
3.2. Application Compliance Considerations 3.2. Application Compliance Considerations
skipping to change at page 5, line 48 skipping to change at page 6, line 5
For example, an application could be defined where the nominal For example, an application could be defined where the nominal
central frequency granularity is 12.5 GHz (by only requiring values central frequency granularity is 12.5 GHz (by only requiring values
of n that are even) and that only requires slot widths as a multiple of n that are even) and that only requires slot widths as a multiple
of 25 GHz (by only requiring values of m that are even). of 25 GHz (by only requiring values of m that are even).
Hence, in order to support all possible applications and Hence, in order to support all possible applications and
implementations the following information should be advertised for a implementations the following information should be advertised for a
flexi-grid DWDM link: flexi-grid DWDM link:
o Chanel Spacing (C.S.): as defined in [RFC7699] for flexi-grid, is o Channel Spacing (C.S.): as defined in [RFC7699] for flexi-grid,
set to 5 to denote 6.25GHz. is set to 5 to denote 6.25GHz.
o Central frequency granularity: a multiplier of C.S.. o Central frequency granularity: a multiplier of C.S..
o Slot width granularity: a multiplier of 2*C.S.. o Slot width granularity: a multiplier of 2*C.S..
o Slot width range: two multipliers of the slot width granularity, o Slot width range: two multipliers of the slot width granularity,
each indicate the minimal and maximal slot width supported by a each indicate the minimal and maximal slot width supported by a
port respectively. port respectively.
The combination of slot width range and slot width granularity can The combination of slot width range and slot width granularity can
skipping to change at page 7, line 30 skipping to change at page 7, line 32
advertised for the link. This section defines the GMPLS OSPF-TE advertised for the link. This section defines the GMPLS OSPF-TE
extensions in support of advertising the available frequency ranges extensions in support of advertising the available frequency ranges
for flexi-grid DWDM links. for flexi-grid DWDM links.
4.1. ISCD Extensions for Flexi-grid 4.1. ISCD Extensions for Flexi-grid
Value Type Value Type
----- ---- ----- ----
152 (TBA by IANA) Flexi-Grid-LSC capable 152 (TBA by IANA) Flexi-Grid-LSC
Switching Capability and Encoding values MUST be used as follows: Switching Capability and Encoding values MUST be used as follows:
Switching Capability = Flexi-Grid-LSC Switching Capability = Flexi-Grid-LSC
Encoding Type = lambda [as defined in RFC3471] Encoding Type = lambda [as defined in RFC3471]
When Switching Capability and Encoding fields are set to values as When Switching Capability and Encoding fields are set to values as
stated above, the Interface Switching Capability Descriptor MUST be stated above, the Interface Switching Capability Descriptor MUST be
interpreted as in [RFC4203] with the optional inclusion of one or interpreted as in [RFC4203] with the optional inclusion of one or
more Switching Capability Specific Information sub-TLVs. more Switching Capability Specific Information sub-TLVs.
As the "Max LSP Bandwidth at priority x" (x from 0 to 7) fields in
the generic part of the Interface Switching Capability Descriptor
[RFC4203] are not meaningful for flexi-grid DWDM links, the values
of these fields MUST be set to zero and MUST be ignored. The
Switching Capability Specific Information (SCSI) as defined below
provides the corresponding information for flexi-grid DWDM links.
4.1.1. Switching Capability Specific Information (SCSI) 4.1.1. Switching Capability Specific Information (SCSI)
The technology specific part of the Flexi-grid ISCD should include The technology specific part of the Flexi-grid ISCD should include
the available frequency spectrum resource as well as the max slot the available frequency spectrum resource as well as the max slot
widths per priority information. The format of this flex-grid SCSI, widths per priority information. The format of this flex-grid SCSI,
the frequency available bitmap TLV, is depicted in the following the frequency available bitmap TLV, is depicted in the following
figure: figure:
0 1 2 3 0 1 2 3
0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
skipping to change at page 9, line 22 skipping to change at page 9, line 33
effective bits in the Bit Map field. effective bits in the Bit Map field.
Bit Map (variable): Indicates whether a basic frequency slot, Bit Map (variable): Indicates whether a basic frequency slot,
characterized by a nominal central frequency and a fixed m value of characterized by a nominal central frequency and a fixed m value of
1, is available or not for flexi-grid LSP setup. The first nominal 1, is available or not for flexi-grid LSP setup. The first nominal
central frequency is the value of starting n and with the subsequent central frequency is the value of starting n and with the subsequent
ones implied by the position in the bitmap. Note that when setting ones implied by the position in the bitmap. Note that when setting
to 1, it means that the corresponding central frequency is available to 1, it means that the corresponding central frequency is available
for a flexi-grid LSP with m=1; and when setting to 0, it means the for a flexi-grid LSP with m=1; and when setting to 0, it means the
corresponding central frequency is unavailable. Note that a corresponding central frequency is unavailable. Note that a
centralized SA process will need to extend this to high values of centralized SA process will need to extend this to high values of m
m by checking a sufficient large number of consecutive basic by checking a sufficient large number of consecutive basic frequency
frequency slots that are available. slots that are available.
Padding Bits (variable): Padded after the Bit Map to make it a Padding Bits (variable): Padded after the Bit Map to make it a
multiple of four bytes if necessary. Padding bits MUST be set to 0 multiple of four bytes if necessary. Padding bits MUST be set to 0
and MUST be ignored on receipt. and MUST be ignored on receipt.
The Reserved field MUST be set to zero on transmission and SHOULD be The Reserved field MUST be set to zero on transmission and SHOULD be
ignored on receipt. ignored on receipt.
The starting n MAY be set to the lowest possible nominal central The starting n MAY be set to the lowest possible nominal central
frequency supported by the link. An example is provided in section frequency supported by the link. An example is provided in section
skipping to change at page 13, line 21 skipping to change at page 13, line 25
Upon approval of this document, IANA will make the assignment in the Upon approval of this document, IANA will make the assignment in the
"Switching Types" section of the "GMPLS Signaling Parameters" "Switching Types" section of the "GMPLS Signaling Parameters"
registry located at http://www.iana.org/assignments/gmpls-sig- registry located at http://www.iana.org/assignments/gmpls-sig-
parameters: parameters:
Value Name Reference Value Name Reference
--------- -------------------------- ---------- --------- -------------------------- ----------
152 (*) Flexi-Grid-LSC capable [This.I-D] 152 (*) Flexi-Grid-LSC [This.I-D]
(*) Suggested value (*) Suggested value
5.2. New Sub-TLV 5.2. New Sub-TLV
This document defines one new sub-TLV that are carried in the This document defines one new sub-TLV that are carried in the
Interface Switching Capability Descriptors [RFC4203] with Signal Interface Switching Capability Descriptors [RFC4203] with Signal
Type Flexi-Grid-LSC capable. Type Flexi-Grid-LSC.
Upon approval of this document, IANA will create and maintain a new Upon approval of this document, IANA will create and maintain a new
sub-registry, the "Types for sub-TLVs of Flexi-Grid-LSC capable SCSI sub-registry, the "Types for sub-TLVs of Flexi-Grid-LSC SCSI (Switch
(Switch Capability-Specific Information)" registry under the "Open Capability-Specific Information)" registry under the "Open Shortest
Shortest Path First (OSPF) Traffic Engineering TLVs" registry, see Path First (OSPF) Traffic Engineering TLVs" registry, see
http://www.iana.org/assignments/ospf-traffic-eng-tlvs/ospf-traffic- http://www.iana.org/assignments/ospf-traffic-eng-tlvs/ospf-traffic-
eng-tlvs.xml, with the sub-TLV types as follows: eng-tlvs.xml, with the sub-TLV types as follows:
This document defines new sub-TLV types as follows: This document defines new sub-TLV types as follows:
Value Sub-TLV Reference Value Sub-TLV Reference
--------- -------------------------- ---------- --------- -------------------------- ----------
0 Reserved [This.I-D] 0 Reserved [This.I-D]
1 Frequency availability bitmap [This.I-D] 1 Frequency availability bitmap [This.I-D]
skipping to change at page 16, line 6 skipping to change at page 16, line 6
Adrian Farrel Adrian Farrel
Old Dog Consulting Old Dog Consulting
Email: adrian@olddog.co.uk Email: adrian@olddog.co.uk
Fatai Zhang Fatai Zhang
Huawei Technologies Huawei Technologies
Email: zhangfatai@huawei.com Email: zhangfatai@huawei.com
Lei Wang, Lei Wang,
ZTE ZTE
Email: wang.lei31@zte.com.cn Email: wang.lei@bupt.edu.cn
Guoying Zhang, Guoying Zhang,
China Academy of Telecom Research China Academy of Telecom Research
Email: zhangguoying@ritt.cn Email: zhangguoying@ritt.cn
10. References 10. References
10.1. Normative References 10.1. Normative References
[RFC2119] S. Bradner, "Key words for use in RFCs to indicate [RFC2119] S. Bradner, "Key words for use in RFCs to indicate
 End of changes. 13 change blocks. 
49 lines changed or deleted 59 lines changed or added

This html diff was produced by rfcdiff 1.45. The latest version is available from http://tools.ietf.org/tools/rfcdiff/