draft-ietf-ospf-te-node-addr-02.txt   draft-ietf-ospf-te-node-addr-03.txt 
Network Working Group Rahul Aggarwal Network Working Group R. Aggarwal
Internet Draft Kireeti Kompella Internet Draft Juniper Networks
Expiration Date: September 2005 Juniper Networks Expiration Date: December 2006
K. Kompella
Juniper Networks
Advertising a Router's Local Addresses in OSPF TE Extensions Advertising a Router's Local Addresses in OSPF TE Extensions
draft-ietf-ospf-te-node-addr-02.txt draft-ietf-ospf-te-node-addr-03.txt
Status of this Memo Status of this Memo
By submitting this Internet-Draft, we certify that any applicable By submitting this Internet-Draft, each author represents that any
patent or IPR claims of which we are aware have been disclosed, and applicable patent or other IPR claims of which he or she is aware
any of which we become aware will be disclosed, in accordance with have been or will be disclosed, and any of which he or she becomes
RFC 3668. aware will be disclosed, in accordance with Section 6 of BCP 79.
Internet-Drafts are working documents of the Internet Engineering Internet-Drafts are working documents of the Internet Engineering
Task Force (IETF), its areas, and its working groups. Note that Task Force (IETF), its areas, and its working groups. Note that
other groups may also distribute working documents as Internet- other groups may also distribute working documents as Internet-
Drafts. Drafts.
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."
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.
Abstract Abstract
This document describes procedures that enhance OSPF Traffic This document describes procedures that enhance OSPF Traffic
Engineering (TE) extensions for advertising a router's local Engineering (TE) extensions for advertising a router's local
addresses. This is needed to enable other routers in a network to addresses. This is needed to enable other routers in a network to
compute traffic engineered MPLS LSPs to a given router's local compute traffic engineered MPLS LSPs to a given router's local
addresses. Currently, the only addresses belonging to a router that addresses. Currently, the only addresses belonging to a router that
are advertised in TE LSAs are the local addresses corresponding to TE are advertised in TE LSAs are the local addresses corresponding to TE
enabled links and the local address corresponding to the Router ID. enabled links and the local address corresponding to the Router ID.
Conventions used in this document Table of Contents
1 Specification of requirements ......................... 2
2 Motivation ............................................ 2
3 A Potential Solution .................................. 3
4 Proposed Solution ..................................... 3
4.1 Node Attribute TLV .................................... 4
4.2 Operation ............................................. 5
5 Security Considerations ............................... 5
6 IANA Considerations ................................... 5
7 Acknowledgments ....................................... 5
8 References ............................................ 5
8.1 Normative References .................................. 5
8.2 Informative References ................................ 6
9 Author Information .................................... 6
10 Intellectual Property Statement ....................... 6
11 Full Copyright Statement .............................. 7
1. Specification of requirements
The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT", The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT",
"SHOULD", "SHOULD NOT", "RECOMMENDED", "MAY", and "OPTIONAL" in this "SHOULD", "SHOULD NOT", "RECOMMENDED", "MAY", and "OPTIONAL" in this
document are to be interpreted as described in RFC-2119 [KEYWORDS]. document are to be interpreted as described in [RFC2119].
1. Motivation 2. Motivation
In some cases it is desirable to setup constrained shortest path In some cases it is desirable to setup constrained shortest path
first (CSPF) computed MPLS TE LSPs to local addresses of a router, first (CSPF) computed MPLS TE LSPs to local addresses of a router,
that are not currently advertised in the TE LSAs i.e. loopback and that are not currently advertised in the TE LSAs i.e. loopback and
non-TE interface addresses. non-TE interface addresses.
For instance, in a network carrying VPN and non-VPN traffic, it is For instance, in a network carrying VPN and non-VPN traffic, it is
often desirable to use different MPLS TE LSPs for the VPN traffic and often desirable to use different MPLS TE LSPs for the VPN traffic and
the non-VPN traffic. In this case one loopback address may be used as the non-VPN traffic. In this case one loopback address may be used as
the BGP next-hop for VPN traffic while another may be used as the BGP the BGP next-hop for VPN traffic while another may be used as the BGP
skipping to change at page 3, line 5 skipping to change at page 3, line 30
provide stub reachability information to the router but are not provide stub reachability information to the router but are not
sufficient to learn all the local addresses of a router. In sufficient to learn all the local addresses of a router. In
particular for a subnetted point-to-point (P2P) interface the stub particular for a subnetted point-to-point (P2P) interface the stub
link ID is the subnet address, while for a non-subnetted interface link ID is the subnet address, while for a non-subnetted interface
the stub link ID is the neighbor address. Intra-prefix LSAs in OSPFv3 the stub link ID is the neighbor address. Intra-prefix LSAs in OSPFv3
[OSPFv3] are also not sufficient to learn the local addresses. [OSPFv3] are also not sufficient to learn the local addresses.
For the above reasons this document proposes an enhancement to OSPF For the above reasons this document proposes an enhancement to OSPF
TE extensions to advertise the local addresses of a node. TE extensions to advertise the local addresses of a node.
2. A Potential Solution 3. A Potential Solution
A potential solution would be to advertise a TE link TLV for each A potential solution would be to advertise a TE link TLV for each
local address, possibly with a new link type. However, this is local address, possibly with a new link type. However, this is
inefficient since the only meaningful information is the address. inefficient since the only meaningful information is the address.
Furthermore, this would require implementations to process these TE Furthermore, this would require implementations to process these TE
link TLVs differently from others; for example, the TE metric is link TLVs differently from others; for example, the TE metric is
normally considered a mandatory sub-TLV, but would have no meaning normally considered a mandatory sub-TLV, but would have no meaning
for a local address. for a local address.
3. Proposed Solution 4. Proposed Solution
The proposed solution is to advertise the local addresses of a router The proposed solution is to advertise the local addresses of a router
in a new OSPF TE LSA node attribute TLV. node attribute TLV. It is in a new OSPF TE LSA node attribute TLV. node attribute TLV. It is
anticipated that a node attribute TLV will also prove more generally anticipated that a node attribute TLV will also prove more generally
useful. useful.
3.1. Node Attribute TLV 4.1. Node Attribute TLV
The node attribute TLV carries the attributes associated with a The node attribute TLV carries the attributes associated with a
router. The TLV type is TBD and the length is variable. It contains router. The TLV type is TBD and the length is variable. It contains
one or more sub-TLVs. This document defines the following sub-TLVs: one or more sub-TLVs. This document defines the following sub-TLVs:
1. Node IPv4 Local Address sub-TLV 1. Node IPv4 Local Address sub-TLV
2. Node IPv6 Local Address sub-TLV 2. Node IPv6 Local Address sub-TLV
The node IPv4 local address sub-TLV has a type of 1 and contains one The node IPv4 local address sub-TLV has a type of 1 and contains one
or more local IPv4 addresses. It has the following format: or more local IPv4 addresses. It has the following format:
skipping to change at page 4, line 27 skipping to change at page 5, line 9
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| IPv6 Address n | | IPv6 Address n |
| | | |
| | | |
| | | |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-- +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+--
The length is set to 16 * n where n is the number of local addresses The length is set to 16 * n where n is the number of local addresses
included in the sub-TLV. included in the sub-TLV.
3.2. Operation 4.2. Operation
A router announces one or more local addresses in the node attribute A router announces one or more local addresses in the node attribute
TLV. The local addresses that can be learned from TE LSAs i.e. TLV. The local addresses that can be learned from TE LSAs i.e.
router address and TE interface addresses should not be advertised in router address and TE interface addresses SHOULD not be advertised in
the node local address sub-TLV. The local addresses advertised will the node local address sub-TLV. The local addresses advertised will
depend on the local configuration of the advertising router. The depend on the local configuration of the advertising router. The
default behavior may be to advertise all the loopback interface default behavior MAY be to advertise all the loopback interface
addresses. addresses.
4. Security Considerations 5. Security Considerations
This document does not introduce any further security issues other This document does not introduce any further security issues other
than those discussed in [OSPF-TE, OSPFv3-TE]. than those discussed in [OSPF-TE, OSPFv3-TE].
5. IANA Considerations 6. IANA Considerations
The Node Attribute TLV type has to be IANA assigned from the range 3 The Node Attribute TLV type has to be IANA assigned from the range 3
- 32767 as specified in [OSPF-TE]. - 32767 as specified in [OSPF-TE].
6. Acknowledgments 7. Acknowledgments
We would like to thank Nischal Sheth for his contribution to this We would like to thank Nischal Sheth for his contribution to this
work. We woud also like to thank Jean Philippe Vasseur, Acee Lindem, work. We woud also like to thank Jean Philippe Vasseur, Acee Lindem,
Venkata Naidu and Dimitri Papadimitriou for their comments. Venkata Naidu and Dimitri Papadimitriou for their comments.
7. References 8. References
7.1. Normative References 8.1. Normative References
[OSPF] Moy, J., "OSPF Version 2", RFC 2328, April 1998. [OSPF] Moy, J., "OSPF Version 2", RFC 2328, April 1998.
[RFC] 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.
[OSPF-TE] D. Katz, K. Kompella, D. Yeung, "Traffic Engineering [OSPF-TE] D. Katz, K. Kompella, D. Yeung, "Traffic Engineering
Extensions to OSPF version 2", RFC 3630, Extensions to OSPF version 2", RFC 3630,
September 2003. September 2003.
[OSPFv3] R. Coltun, D. Ferguson, J. Moy, "OSPF for IPv6", [OSPFv3] R. Coltun, D. Ferguson, J. Moy, "OSPF for IPv6",
RFC 2740. RFC 2740.
7.2. Informative References 8.2. Informative References
[OSPFv3-TE] K. Ishiguro, T. Takada, "Traffic Engineering [OSPFv3-TE] K. Ishiguro, T. Takada, "Traffic Engineering
Extensions to OSPF version 3", Extensions to OSPF version 3",
draft-ietf-ospf-ospfv3-traffic-01.txt. draft-ietf-ospf-ospfv3-traffic-01.txt.
8. Author Information 9. Author Information
Rahul Aggarwal Rahul Aggarwal
Juniper Networks Juniper Networks
1194 North Mathilda Ave. 1194 North Mathilda Ave.
Sunnyvale, CA 94089 Sunnyvale, CA 94089
Email: rahul@juniper.net Email: rahul@juniper.net
Kireeti Kompella Kireeti Kompella
Juniper Networks Juniper Networks
1194 North Mathilda Ave. 1194 North Mathilda Ave.
skipping to change at page 6, line 4 skipping to change at page 6, line 25
Rahul Aggarwal Rahul Aggarwal
Juniper Networks Juniper Networks
1194 North Mathilda Ave. 1194 North Mathilda Ave.
Sunnyvale, CA 94089 Sunnyvale, CA 94089
Email: rahul@juniper.net Email: rahul@juniper.net
Kireeti Kompella Kireeti Kompella
Juniper Networks Juniper Networks
1194 North Mathilda Ave. 1194 North Mathilda Ave.
Sunnyvale, CA 94089 Sunnyvale, CA 94089
Email: kireeti@juniper.net Email: kireeti@juniper.net
9. Intellectual Property 10. Intellectual Property Statement
The IETF takes no position regarding the validity or scope of any The IETF takes no position regarding the validity or scope of any
Intellectual Property Rights or other rights that might be claimed to Intellectual Property Rights or other rights that might be claimed to
pertain to the implementation or use of the technology described in pertain to the implementation or use of the technology described in
this document or the extent to which any license under such rights this document or the extent to which any license under such rights
might or might not be available; nor does it represent that it has might or might not be available; nor does it represent that it has
made any independent effort to identify any such rights. Information made any independent effort to identify any such rights. Information
on the procedures with respect to rights in RFC documents can be on the procedures with respect to rights in RFC documents can be
found in BCP 78 and BCP 79. found in BCP 78 and BCP 79.
skipping to change at page 6, line 32 skipping to change at page 7, line 7
such proprietary rights by implementers or users of this such proprietary rights by implementers or users of this
specification can be obtained from the IETF on-line IPR repository at specification can be obtained from the IETF on-line IPR repository at
http://www.ietf.org/ipr. http://www.ietf.org/ipr.
The IETF invites any interested party to bring to its attention any The IETF invites any interested party to bring to its attention any
copyrights, patents or patent applications, or other proprietary copyrights, patents or patent applications, or other proprietary
rights that may cover technology that may be required to implement rights that may cover technology that may be required to implement
this standard. Please address the information to the IETF at ietf- this standard. Please address the information to the IETF at ietf-
ipr@ietf.org. ipr@ietf.org.
10. Full Copyright Statement 11. Full Copyright Statement
Copyright (C) The Internet Society (2004). This document is subject Copyright (C) The Internet Society (2006). This document is subject
to the rights, licenses and restrictions contained in BCP 78 and to the rights, licenses and restrictions contained in BCP 78, and
except as set forth therein, the authors retain all their rights. except as set forth therein, the authors retain all their rights.
This document and the information contained herein are provided on an This document and the information contained herein are provided on an
"AS IS" basis and THE CONTRIBUTOR, THE ORGANIZATION HE/SHE REPRESENTS "AS IS" basis and THE CONTRIBUTOR, THE ORGANIZATION HE/SHE REPRESENTS
OR IS SPONSORED BY (IF ANY), THE INTERNET SOCIETY AND THE INTERNET OR IS SPONSORED BY (IF ANY), THE INTERNET SOCIETY AND THE INTERNET
ENGINEERING TASK FORCE DISCLAIM ALL WARRANTIES, EXPRESS OR IMPLIED, ENGINEERING TASK FORCE DISCLAIM ALL WARRANTIES, EXPRESS OR IMPLIED,
INCLUNG BUT NOT LIMITED TO ANY WARRANTY THAT THE USE OF THE INCLUDING BUT NOT LIMITED TO ANY WARRANTY THAT THE USE OF THE
INFORMATION HEREIN WILL NOT INFRINGE ANY RIGHTS OR ANY IMPLIED INFORMATION HEREIN WILL NOT INFRINGE ANY RIGHTS OR ANY IMPLIED
WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE.
11. Acknowledgement
Funding for the RFC Editor function is currently provided by the
Internet Society.
 End of changes. 28 change blocks. 
34 lines changed or deleted 52 lines changed or added

This html diff was produced by rfcdiff 1.32. The latest version is available from http://www.levkowetz.com/ietf/tools/rfcdiff/