draft-ietf-trill-directory-assist-mechanisms-12v3.original   draft-ietf-trill-directory-assist-mechanisms-12v3preedits.txt 
INTERNET-DRAFT D. Eastlake
INTERNET-DRAFT Donald Eastlake Intended status: Proposed Standard L. Dunbar
Intended status: Proposed Standard Linda Dunbar Expires: September 1, 2017 Huawei
Huawei R. Perlman
Radia Perlman
EMC EMC
Yizhou Li Y. Li
Huawei Huawei
Expires: September 1, 2017 March 2, 2017 March 2, 2017
TRILL: Edge Directory Assist Mechanisms TRILL: Edge Directory Assist Mechanisms
<draft-ietf-trill-directory-assist-mechanisms-12.txt> <draft-ietf-trill-directory-assist-mechanisms-12.txt>
Abstract Abstract
This document describes mechanisms for providing directory service to This document describes mechanisms for providing directory service to
TRILL (Transparent Interconnection of Lots of Links) edge switches. TRILL (Transparent Interconnection of Lots of Links) edge switches.
The directory information provided can be used in reducing multi- The directory information provided can be used in reducing multi-
destination traffic, particularly ARP/ND and unknown unicast destination traffic, particularly ARP/ND and unknown unicast
flooding. It can also be used to detect traffic with forged source flooding. It can also be used to detect traffic with forged source
addresses. addresses.
Status of This Memo Status of This Memo
This Internet-Draft is submitted to IETF in full conformance with the This Internet-Draft is submitted in full conformance with the
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Distribution of this document is unlimited. Comments should be sent
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Copyright (c) 2017 IETF Trust and the persons identified as the
document authors. All rights reserved.
This document is subject to BCP 78 and the IETF Trust's Legal
Provisions Relating to IETF Documents
(http://trustee.ietf.org/license-info) in effect on the date of
publication of this document. Please review these documents
carefully, as they describe your rights and restrictions with respect
to this document. Code Components extracted from this document must
include Simplified BSD License text as described in Section 4.e of
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described in the Simplified BSD License.
INTERNET-DRAFT TRILL: Directory Service Mechanisms INTERNET-DRAFT TRILL: Directory Service Mechanisms
Table of Contents Table of Contents
1. Introduction............................................4 1. Introduction............................................4
1.1 Uses of Directory Information..........................5 1.1 Uses of Directory Information..........................5
1.2 Terminology............................................5 1.2 Terminology............................................5
2. Push Model Directory Assistance Mechanisms..............7 2. Push Model Directory Assistance Mechanisms..............7
2.1 Requesting Push Service................................7 2.1 Requesting Push Service................................7
2.2 Push Directory Servers.................................7 2.2 Push Directory Servers.................................7
2.3 Push Directory Server State Machine....................8 2.3 Push Directory Server State Machine....................8
2.3.1 Push Directory States................................9 2.3.1 Push Directory States................................9
2.3.2 Push Directory Events and Conditions................11 2.3.2 Push Directory Events and Conditions................11
2.3.3 State Transition Diagram and Table..................12 2.3.3 State Transition Diagram and Table..................12
2.4 End Stations and Push Directories.....................13 2.4 End Stations and Push Directories.....................13
2.5 Additional Push Details...............................14 2.5 Additional Push Details...............................14
2.6 Primary to Secondary Server Push Service..............15 2.6 Primary to Secondary Server Push Service..............15
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3.5.1 Pull Directory Hosted on an End Station.............33 3.5.1 Pull Directory Hosted on an End Station.............33
3.5.2 Use of Pull Directory by End Stations...............34 3.5.2 Use of Pull Directory by End Stations...............34
3.5.3 Native Pull Directory Messages......................35 3.5.3 Native Pull Directory Messages......................35
3.6 Pull Directory Message Errors.........................35 3.6 Pull Directory Message Errors.........................35
3.6.1 Error Codes.........................................36 3.6.1 Error Codes.........................................36
3.6.2 Sub-Errors Under Error Codes 1 and 3................37 3.6.2 Sub-Errors Under Error Codes 1 and 3................37
3.6.3 Sub-Errors Under Error Codes 128 and 131............37 3.6.3 Sub-Errors Under Error Codes 128 and 131............37
3.7 Additional Pull Details...............................38 3.7 Additional Pull Details...............................38
3.8 The No Data Flag......................................38 3.8 The No Data Flag......................................38
3.9 Pull Directory Service Configuration..................39 3.9 Pull Directory Service Configuration..................39
4. Directory Use Strategies and Push-Pull Hybrids.........41 4. Directory Use Strategies and Push-Pull Hybrids.........41
5. TRILL ES-IS............................................43 5. TRILL ES-IS............................................43
5.1 PDUs and System IDs...................................43 5.1 PDUs and System IDs...................................43
5.2 Adjacency, DRB Election, Hellos, TLVs, Etc............44 5.2 Adjacency, DRB Election, Hellos, TLVs, Etc............44
5.3 Link State............................................44 5.3 Link State............................................44
INTERNET-DRAFT TRILL: Directory Service Mechanisms
Table of Contents Continued
6. Security Considerations................................45 6. Security Considerations................................45
6.1 Directory Information Security........................45 6.1 Directory Information Security........................45
6.2 Directory Confidentiality and Privacy.................45 6.2 Directory Confidentiality and Privacy.................45
6.3 Directory Message Security Considerations.............45 6.3 Directory Message Security Considerations.............45
7. IANA Considerations....................................47 7. IANA Considerations....................................47
7.1 ESADI-Parameter Data Extensions.......................47 7.1 ESADI-Parameter Data Extensions.......................47
7.2 RBridge Channel Protocol Numbers......................48 7.2 RBridge Channel Protocol Numbers......................48
7.3 The Pull Directory (PUL) and No Data (NOD) Bits.......48 7.3 The Pull Directory (PUL) and No Data (NOD) Bits.......48
7.4 TRILL Pull Directory QTYPEs...........................49 7.4 TRILL Pull Directory QTYPEs...........................49
7.5 Pull Directory Error Code Registries..................49 7.5 Pull Directory Error Code Registries..................49
7.6 TRILL-ES-IS MAC Address...............................49 7.6 TRILL-ES-IS MAC Address...............................49
Normative References......................................50 Normative References......................................50
Informational References..................................51 Informational References..................................51
Acknowledgments...........................................53 Acknowledgments...........................................53
Authors' Addresses........................................54 Authors' Addresses........................................54
Copyright, Disclaimer, and Additional IPR Provisions......55
INTERNET-DRAFT TRILL: Directory Service Mechanisms INTERNET-DRAFT TRILL: Directory Service Mechanisms
1. Introduction 1. Introduction
[RFC7067] gives a problem statement and high level design for using [RFC7067] gives a problem statement and high level design for using
directory servers to assist TRILL [RFC6325] [RFC7780] edge nodes in directory servers to assist TRILL [RFC6325] [RFC7780] edge nodes in
reducing multi-destination ARP/ND [ARPND], reducing unknown unicast reducing multi-destination ARP/ND [ARPND], reducing unknown unicast
flooding traffic, and improving security against address spoofing flooding traffic, and improving security against address spoofing
within a TRILL campus. Because multi-destination traffic becomes an within a TRILL campus. Because multi-destination traffic becomes an
increasing burden as a network scales up in number of nodes, reducing increasing burden as a network scales up in number of nodes, reducing
skipping to change at page 41, line 52 skipping to change at page 41, line 52
configured so that some use Push Directory services and some use Pull configured so that some use Push Directory services and some use Pull
Directory services for the same Data Label if both Push and Pull Directory services for the same Data Label if both Push and Pull
Directory services are available for that Data Label. And there can Directory services are available for that Data Label. And there can
be Data Labels for which directory services are not used at all. be Data Labels for which directory services are not used at all.
There are a wide variety of strategies that a TRILL switch can adopt There are a wide variety of strategies that a TRILL switch can adopt
for making use of directory assistance. A few suggestions are given for making use of directory assistance. A few suggestions are given
below. below.
- Even if a TRILL switch will normally be operating with - Even if a TRILL switch will normally be operating with
information from a complete Push Directory server, there will be a information from a complete Push Directory server, there will be a
period of time when it first comes up before the information it period of time when it first comes up before the information it
holds is complete. Or, it could be that the only Push Directories holds is complete. Or, it could be that the only Push Directories
that can push information to it are incomplete or that they are that can push information to it are incomplete or that they are
just starting and may not yet have pushed the entire directory. just starting and may not yet have pushed the entire directory.
INTERNET-DRAFT TRILL: Directory Service Mechanisms INTERNET-DRAFT TRILL: Directory Service Mechanisms
Thus, it is RECOMMENDED that all TRILL switches have a strategy Thus, it is RECOMMENDED that all TRILL switches have a strategy
for dealing with the situation where they do not have complete for dealing with the situation where they do not have complete
directory information. Examples are to send a Pull Directory query directory information. Examples are to send a Pull Directory query
or to revert to [RFC6325] behavior. or to revert to [RFC6325] behavior.
- If a TRILL switch receives a native frame X resulting in - If a TRILL switch receives a native frame X resulting in
seeking directory information, a choice needs to be made as to seeking directory information, a choice needs to be made as to
what to do if it does not already have the directory information what to do if it does not already have the directory information
it needs. In particular, it could (1) immediately flood the TRILL it needs. In particular, it could (1) immediately flood the TRILL
Data packet resulting from ingressing X in parallel with seeking Data packet resulting from ingressing X in parallel with seeking
the directory information, (2) flood that TRILL Data packet after the directory information, (2) flood that TRILL Data packet after
a delay, if it fails to obtain the directory information, or (3) a delay, if it fails to obtain the directory information, or (3)
discard X if it fails to obtain the information. The choice might discard X if it fails to obtain the information. The choice might
depend on the priority of frame X since the higher that priority depend on the priority of frame X since the higher that priority
typically the more urgent the frame is and the greater the typically the more urgent the frame is and the greater the
probability of harm in delaying it. If a Pull Directory request is probability of harm in delaying it. If a Pull Directory request is
sent, it is RECOMMENDED that its priority be derived from the sent, it is RECOMMENDED that its priority be derived from the
priority of the frame X with the derived priority configurable and priority of the frame X with the derived priority configurable and
having the following defaults: having the following defaults:
Ingressed If Flooded If Flooded Ingressed If Flooded If Flooded
Priority Immediately After Delay Priority Immediately After Delay
-------- ----------- ----------- -------- ----------- -----------
7 5 6 7 5 6
6 5 6 6 5 6
5 4 5 5 4 5
4 3 4 4 3 4
3 2 3 3 2 3
2 0 2 2 0 2
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7.6 TRILL-ES-IS MAC Address 7.6 TRILL-ES-IS MAC Address
Action 12: IANA is requested to assign a TRILL multicast MAC address Action 12: IANA is requested to assign a TRILL multicast MAC address
from the "TRILL Multicast Addresses" registry on the TRILL Parameters from the "TRILL Multicast Addresses" registry on the TRILL Parameters
IANA web page [value 01-80-C2-00-00-47 recommended]. Description is IANA web page [value 01-80-C2-00-00-47 recommended]. Description is
"TRILL-ES-IS". Reference is [this document]. "TRILL-ES-IS". Reference is [this document].
INTERNET-DRAFT TRILL: Directory Service Mechanisms INTERNET-DRAFT TRILL: Directory Service Mechanisms
Normative References 8. References
8.1. Normative References
[RFC826] - Plummer, D., "An Ethernet Address Resolution Protocol", [RFC826] - Plummer, D., "An Ethernet Address Resolution Protocol",
RFC 826, November 1982. RFC 826, November 1982.
[RFC903] - Finlayson, R., Mann, T., Mogul, J., and M. Theimer, "A [RFC903] - Finlayson, R., Mann, T., Mogul, J., and M. Theimer, "A
Reverse Address Resolution Protocol", STD 38, RFC 903, June Reverse Address Resolution Protocol", STD 38, RFC 903, June
1984 1984
[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, March 1997 Requirement Levels", BCP 14, RFC 2119, March 1997
skipping to change at page 51, line 35 skipping to change at page 52, line ?
Ghanwani, A., and S. Gupta, "Transparent Interconnection of Ghanwani, A., and S. Gupta, "Transparent Interconnection of
Lots of Links (TRILL): Clarifications, Corrections, and Lots of Links (TRILL): Clarifications, Corrections, and
Updates", RFC 7780, DOI 10.17487/RFC7780, February 2016, Updates", RFC 7780, DOI 10.17487/RFC7780, February 2016,
<http://www.rfc-editor.org/info/rfc7780>. <http://www.rfc-editor.org/info/rfc7780>.
[RFC7961] - Eastlake 3rd, D. and L. Yizhou, "Transparent [RFC7961] - Eastlake 3rd, D. and L. Yizhou, "Transparent
Interconnection of Lots of Links (TRILL): Interface Addresses Interconnection of Lots of Links (TRILL): Interface Addresses
APPsub-TLV", RFC 7961, DOI 10.17487/RFC7961, August 2016, APPsub-TLV", RFC 7961, DOI 10.17487/RFC7961, August 2016,
<http://www.rfc-editor.org/info/rfc7961>. <http://www.rfc-editor.org/info/rfc7961>.
[rfc6439bis] - D. Eastlake, Y. Li, M. Umair, A. Banerjee, and F. Hu, [rfc6439bis] - Eastlake 3rd, D., Li, Y., Umair, M., Banerjee, A., and F. Hu,
"Routing Bridges (RBridges): Appointed Forwarders", draft-ietf- "Routing Bridges (RBridges): Appointed Forwarders", draft-ietf-trill-rfc6439bis, work in progress, June 2016.
trill-rfc6439bis, work in progress.
Informational References 8.2. Informative References
[RFC7067] - Dunbar, L., Eastlake 3rd, D., Perlman, R., and I. [RFC7067] - Dunbar, L., Eastlake 3rd, D., Perlman, R., and I.
Gashinsky, "Directory Assistance Problem and High-Level Design Gashinsky, "Directory Assistance Problem and High-Level Design
Proposal", RFC 7067, November 2013. Proposal", RFC 7067, November 2013.
[RFC7978] - Eastlake 3rd, D., Umair, M., and Y. Li, "Transparent [RFC7978] - Eastlake 3rd, D., Umair, M., and Y. Li, "Transparent
Interconnection of Lots of Links (TRILL): RBridge Channel Interconnection of Lots of Links (TRILL): RBridge Channel
Header Extension", RFC 7978, DOI 10.17487/RFC7978, September Header Extension", RFC 7978, DOI 10.17487/RFC7978, September
2016, <http://www.rfc-editor.org/info/rfc7978>. 2016, <http://www.rfc-editor.org/info/rfc7978>.
[ARPND] - Y. Li, D. Eastlake, L. Dunbar, R. Perlman, I. Gashinsky, [ARPND] - Li, Y., Eastlake 3rd, D., Dunbar, L., Perlman, R., and I. Gashinsky,
"TRILL: ARP/ND Optimization", draft-ietf-trill-arp- "TRILL: ARP/ND Optimization", draft-ietf-trill-arp-optimization, work in progress, June 2016.
optimization, work in progress.
[DirAsstEncap] L. Dunbar, D. Eastlake, R. Perlman, I. Gashingksy,
INTERNET-DRAFT TRILL: Directory Service Mechanisms
"Directory Assisted TRILL Encapsulation", draft-ietf-trill- [DirAsstEncap] Dunbar, L., Eastlake 3rd, D., Perlman, R., and I. Gashingksy,
directory-assisted-encap, work in progress. "Directory Assisted TRILL Encapsulation", draft-ietf-trill-directory-assisted-encap, work in progress, June 2016.
[SmartEN] R. Perlman, F. Hu, D. Eastlake, K. Krupakaran, T. Liao, [SmartEN] Perlman, R., Hu, F., Eastlake 3rd, D., Krupakaran, K., and T. Liao,
"TRILL Smart Endnodes", draft-ietf-trill-smart-endnodes", "TRILL Smart Endnodes", draft-ietf-trill-smart-endnodes, work in progress, June 2016.
draft-ietf-trill-smart-endnodes, work in progress.
[X.233] - ITU-T Recommendation X.233: Protocol for providing the [X.233] - International Telecommunication Union, ITU-T Recommendation X.233, "Protocol for providing the
connectionless-mode network service: Protocol specification, connectionless-mode network service: Protocol specification",
International Telecommunications Union, August 1997 August 1997.
INTERNET-DRAFT TRILL: Directory Service Mechanisms INTERNET-DRAFT TRILL: Directory Service Mechanisms
Acknowledgments Acknowledgments
The contributions of the following persons are gratefully The contributions of the following persons are gratefully
acknowledged: acknowledged:
Amanda Barber, Matthew Bocci, Alissa Cooper, Stephen Farrell, Amanda Barber, Matthew Bocci, Alissa Cooper, Stephen Farrell,
Daniel Franke, Igor Gashinski, Joel Halpern, Susan Hares, Alexey Daniel Franke, Igor Gashinski, Joel Halpern, Susan Hares, Alexey
skipping to change at page 55, line 4 skipping to change at line 2428
Email: Radia@alum.mit.edu Email: Radia@alum.mit.edu
Yizhou Li Yizhou Li
Huawei Technologies Huawei Technologies
101 Software Avenue, 101 Software Avenue,
Nanjing 210012, China Nanjing 210012, China
Phone: +86-25-56622310 Phone: +86-25-56622310
Email: liyizhou@huawei.com Email: liyizhou@huawei.com
INTERNET-DRAFT TRILL: Directory Service Mechanisms
Copyright, Disclaimer, and Additional IPR Provisions
Copyright (c) 2017 IETF Trust and the persons identified as the
document authors. All rights reserved.
This document is subject to BCP 78 and the IETF Trust's Legal
Provisions Relating to IETF Documents
(http://trustee.ietf.org/license-info) in effect on the date of
publication of this document. Please review these documents
carefully, as they describe your rights and restrictions with respect
to this document. Code Components extracted from this document must
include Simplified BSD License text as described in Section 4.e of
the Trust Legal Provisions and are provided without warranty as
described in the Simplified BSD License. The definitive version of
an IETF Document is that published by, or under the auspices of, the
IETF. Versions of IETF Documents that are published by third parties,
including those that are translated into other languages, should not
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