draft-ietf-manet-dlep-pause-extension-00.txt   draft-ietf-manet-dlep-pause-extension-01.txt 
Network Working Group B. Cheng Network Working Group B. Cheng
Internet-Draft D. Wiggins Internet-Draft D. Wiggins
Intended status: Standards Track Lincoln Laboratory Intended status: Standards Track Lincoln Laboratory
Expires: August 13, 2017 L. Berger, Ed. Expires: January 4, 2018 L. Berger, Ed.
LabN Consulting, L.L.C. LabN Consulting, L.L.C.
February 9, 2017 July 3, 2017
DLEP Control Plane Based Pause Extension DLEP Control Plane Based Pause Extension
draft-ietf-manet-dlep-pause-extension-00 draft-ietf-manet-dlep-pause-extension-01
Abstract Abstract
This document defines an extension to the DLEP protocol that enables This document defines an extension to the DLEP protocol that enables
a simple control plane based flow control mechanism. a simple control plane based flow control mechanism.
Status of This Memo Status of This Memo
This Internet-Draft is submitted in full conformance with the This Internet-Draft is submitted in full conformance with the
provisions of BCP 78 and BCP 79. provisions of BCP 78 and BCP 79.
skipping to change at page 1, line 33 skipping to change at page 1, line 33
Internet-Drafts are working documents of the Internet Engineering Internet-Drafts are working documents of the Internet Engineering
Task Force (IETF). Note that other groups may also distribute Task Force (IETF). Note that other groups may also distribute
working documents as Internet-Drafts. The list of current Internet- working documents as Internet-Drafts. The list of current Internet-
Drafts is at http://datatracker.ietf.org/drafts/current/. Drafts is at http://datatracker.ietf.org/drafts/current/.
Internet-Drafts are draft documents valid for a maximum of six months Internet-Drafts are draft documents valid for a maximum of six months
and may be updated, replaced, or obsoleted by other documents at any and may be updated, replaced, or obsoleted by other documents at any
time. It is inappropriate to use Internet-Drafts as reference time. It is inappropriate to use Internet-Drafts as reference
material or to cite them other than as "work in progress." material or to cite them other than as "work in progress."
This Internet-Draft will expire on August 13, 2017. This Internet-Draft will expire on January 4, 2018.
Copyright Notice Copyright Notice
Copyright (c) 2017 IETF Trust and the persons identified as the Copyright (c) 2017 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
skipping to change at page 2, line 12 skipping to change at page 2, line 12
the Trust Legal Provisions and are provided without warranty as the Trust Legal Provisions and are provided without warranty as
described in the Simplified BSD License. described in the Simplified BSD License.
Table of Contents Table of Contents
1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . 2 1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . 2
1.1. Key Words . . . . . . . . . . . . . . . . . . . . . . . . 2 1.1. Key Words . . . . . . . . . . . . . . . . . . . . . . . . 2
2. Extension Usage and Identification . . . . . . . . . . . . . 3 2. Extension Usage and Identification . . . . . . . . . . . . . 3
3. Extension Data Items . . . . . . . . . . . . . . . . . . . . 3 3. Extension Data Items . . . . . . . . . . . . . . . . . . . . 3
3.1. Queue Parameters . . . . . . . . . . . . . . . . . . . . 3 3.1. Queue Parameters . . . . . . . . . . . . . . . . . . . . 3
3.2. Pause . . . . . . . . . . . . . . . . . . . . . . . . . . 5 3.1.1. Queue Parameter Sub Data Item . . . . . . . . . . . . 5
3.2. Pause . . . . . . . . . . . . . . . . . . . . . . . . . . 6
3.3. Restart . . . . . . . . . . . . . . . . . . . . . . . . . 7 3.3. Restart . . . . . . . . . . . . . . . . . . . . . . . . . 7
4. Security Considerations . . . . . . . . . . . . . . . . . . . 8 4. Security Considerations . . . . . . . . . . . . . . . . . . . 8
5. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 8 5. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 8
5.1. Extension Type Value . . . . . . . . . . . . . . . . . . 8 5.1. Extension Type Value . . . . . . . . . . . . . . . . . . 8
5.2. Data Item Values . . . . . . . . . . . . . . . . . . . . 8 5.2. Data Item Values . . . . . . . . . . . . . . . . . . . . 9
6. References . . . . . . . . . . . . . . . . . . . . . . . . . 9 6. References . . . . . . . . . . . . . . . . . . . . . . . . . 9
6.1. Normative References . . . . . . . . . . . . . . . . . . 9 6.1. Normative References . . . . . . . . . . . . . . . . . . 9
6.2. Informative References . . . . . . . . . . . . . . . . . 9 6.2. Informative References . . . . . . . . . . . . . . . . . 9
Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . 9 Appendix A. Acknowledgments . . . . . . . . . . . . . . . . . . 10
Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . 10
1. Introduction 1. Introduction
The Dynamic Link Event Protocol (DLEP) is defined in The Dynamic Link Event Protocol (DLEP) is defined in
[I-D.ietf-manet-dlep]. It provides the exchange of link related [I-D.ietf-manet-dlep]. It provides the exchange of link related
control information between DLEP peers. DLEP peers are comprised of control information between DLEP peers. DLEP peers are comprised of
a modem and a router. DLEP defines a base set of mechanisms as well a modem and a router. DLEP defines a base set of mechanisms as well
as support for possible extensions. This document defines one such as support for possible extensions. This document defines one such
extension. extension.
skipping to change at page 3, line 36 skipping to change at page 3, line 38
The Queue Parameters Data Item is used by a modem to indicate DSCP The Queue Parameters Data Item is used by a modem to indicate DSCP
values that may be independently paused. This data item MUST be values that may be independently paused. This data item MUST be
included in a Session Initialization Response Message that also included in a Session Initialization Response Message that also
contains the Control Plane Pause Extension Type Value in the contains the Control Plane Pause Extension Type Value in the
Extensions Supported Data Item. Updates to these parameters MAY be Extensions Supported Data Item. Updates to these parameters MAY be
sent by a modem by including the data item in Session Update sent by a modem by including the data item in Session Update
Messages. Messages.
The Queue Parameters Data Item identifies DSCPs based on groups of The Queue Parameters Data Item identifies DSCPs based on groups of
logical queues. The number of logical queues is variable as is the logical queues, each of which is referred to via a "Queue Index".
The number of logical queues, or queue indexes, is variable as is the
number of DSCPs associated with each queue. A queue size (in bytes) number of DSCPs associated with each queue. A queue size (in bytes)
is provided for informational purposes. An implementation that does is provided for informational purposes. Queue Indexes are numbered
not support DSCPs would indicate 1 queue with 0 DSCPs, and the number sequentially from zero, where queue index zero is a special case
of bytes that may be in its associated link transmit queue. covering DSCPs which are not otherwise associated with Queue Index.
An implementation that does not support DSCPs would indicate 1 queue
with 0 DSCPs, and the number of bytes that may be in its associated
link transmit queue. Additional logical queues are represented in a
variable series of Queue Parameter sub-data items.
The format of the Queue Parameters Data Item is: The format of the Queue Parameters Data Item is:
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
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Data Item Type | Length | | Data Item Type | Length |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Num Queues | Scale | Reserved | | Num Queues | Scale | Reserved |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|Num DSCPs Q0(0)| Queue Size Q0 | | Reserved | Queue Size Q0 |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Num DSCPs Q1 | Queue Size Q1 |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Num DSCPs Q2 | Queue Size Q2 | | Queue Parameter Sub Data Item 1 |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
: ... : : ... :
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Num DSCPs Qn | Queue Size Qn | | Queue Parameter Sub Data Item n |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| DS Field Q1 | DS Field Q1 | DS Field Q1 | DS Field Q2 |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
: ... | DS Field Qn |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
Data Item Type: TBA2 Data Item Type: TBA2
Length: Variable Length: Variable
Per [I-D.ietf-manet-dlep] Length is the number of octets in the Per [I-D.ietf-manet-dlep] Length is the number of octets in the
data item, excluding the Type and Length fields. data item, excluding the Type and Length fields.
Num Queues: Num Queues:
An 8-bit unsigned integer indicating the number of queues An 8-bit unsigned integer indicating the number of queues
represented in the data item. This field MUST contain a value of represented in the data item. This field MUST contain a value of
at least one (1). Note that this number is one larger than the at least one (1), and is equal to one greater than the number of
largest queue index value included in the data item. included Queue Parameter Sub Data Item.
Scale: Scale:
An 4-bit unsigned integer indicating the scale used in the Queue An 4-bit unsigned integer indicating the scale used in the Queue
Size fields. The valid values are: Size fields. The valid values are:
Value Scale Value Scale
------------ ------------
0 B - Bytes (Octets) 0 B - Bytes (Octets)
1 KB - Kilobytes (B/1024) 1 KB - Kilobytes (B/1024)
2 MB - Megabytes (KB/1024) 2 MB - Megabytes (KB/1024)
3 GB - Gigabytes (MB/1024) 3 GB - Gigabytes (MB/1024)
Reserved: Reserved:
MUST be set to zero by the sender (a modem) and ignored by the MUST be set to zero by the sender (a modem) and ignored by the
receiver (a router). receiver (a router).
Queue Size Q0:
A 24-bit unsigned integer representing the size, in the octet
scale indicated by the Scale field, of queue index zero.
3.1.1. Queue Parameter Sub Data Item
Queue Parameter Sub Data Items are an ordered list composed of the
identical format sub data item. The first sub data item is assigned
a Queue Index value of 1, and subsequent data item are numbered
incrementally. The format of the Queue Parameter Sub Data Item is
patterned after the standard DLEP data item format, see
[I-D.ietf-manet-dlep] Section 11.3. Any errors or inconsistencies
encountered in parsing Sub Data Items are handled in the same fashion
as any other Data Item parsing error encountered in DLEP.
The format of the Queue Parameter Sub Data Item is:
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
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Must be one (1) | Length |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Value... :
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
and Value has the format:
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
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Num DSCPs Qn | Queue Size Qn |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| DS Field Qn | DS Field Qn | ... :
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
: ... | DS Field Qn |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
Length: Variable
Per [I-D.ietf-manet-dlep] Length is the number of octets in the
data item, excluding the Type and Length fields.
Num DSCPs Qn: Num DSCPs Qn:
An 8-bit unsigned integer indicating the number of DSCPs An 8-bit unsigned integer indicating the number of DSCPs
associated with the indexed queue. Other than the special case associated with the queue index associated with the sub data item.
covered in the next paragraph, this field MUST contain a value of This field MUST contain a value of at least one (1).
at least one (1). Queue indexes start at zero (0) and the maximum
queue index "Qn" is one less than the value carried in the Num
Queues field. Queue indexes are implicit in the position in the
data item.
Queue index zero "Q0" is a special case. It is used for any
traffic that does not carry a DSCP value represented in the data
item. Therefore the value of the Queue index zero field, "Num
DSCPs Q0", field MUST be zero (0).
Queue Size Qn: Queue Size Qn:
A 24-bit unsigned integer representing the size, in the octet A 24-bit unsigned integer representing the size, in the octet
scale indicated by the Scale field, of the queue supporting scale indicated by the Scale field, of the queue supporting
traffic with the DSCPs associated with the queue index. traffic with the DSCPs associated with the queue index.
DS Field Qn: DS Field Qn:
The data item contains a sequence of 8 bit DS Fields. The The data item contains a sequence of 8 bit DS Fields. The
skipping to change at page 6, line 42 skipping to change at page 7, line 21
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
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Data Item Type | Length | | Data Item Type | Length |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Queue Index | ... : | Queue Index | ... :
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
: ... | Queue Index | : ... | Queue Index |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
[LB note: a list of Queue Indexes is now supported as is special
value 255.]
Data Item Type: TBA3 Data Item Type: TBA3
Length: Variable Length: Variable
Per [I-D.ietf-manet-dlep] Length is the number of octets in the Per [I-D.ietf-manet-dlep] Length is the number of octets in the
data item, excluding the Type and Length fields. It will equal data item, excluding the Type and Length fields. It will equal
the number of Queue Index fields carried in the data item. the number of Queue Index fields carried in the data item.
Queue Index: Queue Index:
skipping to change at page 9, line 10 skipping to change at page 9, line 37
| TBA4 | Restart | | TBA4 | Restart |
+-----------+------------------+ +-----------+------------------+
Table 2: Requested Data Item Values Table 2: Requested Data Item Values
6. References 6. References
6.1. Normative References 6.1. Normative References
[I-D.ietf-manet-dlep] [I-D.ietf-manet-dlep]
Ratliff, S., Jury, S., Satterwhite, D., Taylor, R., and (. Ratliff, S., Jury, S., Satterwhite, D., Taylor, R., and B.
(Unknown), "Dynamic Link Exchange Protocol (DLEP)", draft- Berry, "Dynamic Link Exchange Protocol (DLEP)", draft-
ietf-manet-dlep-24 (work in progress), July 2016. ietf-manet-dlep-29 (work in progress), March 2017.
[RFC2119] Bradner, S., "Key words for use in RFCs to Indicate [RFC2119] Bradner, S., "Key words for use in RFCs to Indicate
Requirement Levels", BCP 14, RFC 2119, Requirement Levels", BCP 14, RFC 2119,
DOI 10.17487/RFC2119, March 1997, DOI 10.17487/RFC2119, March 1997,
<http://www.rfc-editor.org/info/rfc2119>. <http://www.rfc-editor.org/info/rfc2119>.
6.2. Informative References 6.2. Informative References
[I-D.ietf-manet-credit-window] [I-D.ietf-manet-credit-window]
Ratliff, S., "Credit Windowing extension for DLEP", draft- Ratliff, S., "Credit Windowing extension for DLEP", draft-
ietf-manet-credit-window-04 (work in progress), April ietf-manet-credit-window-07 (work in progress), November
2016. 2016.
[RFC2474] Nichols, K., Blake, S., Baker, F., and D. Black, [RFC2474] Nichols, K., Blake, S., Baker, F., and D. Black,
"Definition of the Differentiated Services Field (DS "Definition of the Differentiated Services Field (DS
Field) in the IPv4 and IPv6 Headers", RFC 2474, Field) in the IPv4 and IPv6 Headers", RFC 2474,
DOI 10.17487/RFC2474, December 1998, DOI 10.17487/RFC2474, December 1998,
<http://www.rfc-editor.org/info/rfc2474>. <http://www.rfc-editor.org/info/rfc2474>.
[RFC2475] Blake, S., Black, D., Carlson, M., Davies, E., Wang, Z., [RFC2475] Blake, S., Black, D., Carlson, M., Davies, E., Wang, Z.,
and W. Weiss, "An Architecture for Differentiated and W. Weiss, "An Architecture for Differentiated
Services", RFC 2475, DOI 10.17487/RFC2475, December 1998, Services", RFC 2475, DOI 10.17487/RFC2475, December 1998,
<http://www.rfc-editor.org/info/rfc2475>. <http://www.rfc-editor.org/info/rfc2475>.
Appendix A. Acknowledgments
The sub data item format was inspired by Rick Taylor's "Data Item
Containers".
Authors' Addresses Authors' Addresses
Bow-Nan Cheng Bow-Nan Cheng
Lincoln Laboratory Lincoln Laboratory
Massachusetts Institute of Technology Massachusetts Institute of Technology
244 Wood Street 244 Wood Street
Lexington, MA 02420-9108 Lexington, MA 02420-9108
Email: bcheng@ll.mit.edu Email: bcheng@ll.mit.edu
David Wiggins David Wiggins
Lincoln Laboratory Lincoln Laboratory
Massachusetts Institute of Technology Massachusetts Institute of Technology
244 Wood Street 244 Wood Street
Lexington, MA 02420-9108 Lexington, MA 02420-9108
Email: David.Wiggins@ll.mit.edu Email: David.Wiggins@ll.mit.edu
Lou Berger (editor) Lou Berger (editor)
LabN Consulting, L.L.C. LabN Consulting, L.L.C.
 End of changes. 20 change blocks. 
40 lines changed or deleted 79 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/