draft-ietf-ccamp-gmpls-ospf-g709v3-02.txt   draft-ietf-ccamp-gmpls-ospf-g709v3-03.txt 
CCAMP Working Group D. Ceccarelli, Ed. CCAMP Working Group D. Ceccarelli, Ed.
Internet-Draft D. Caviglia Internet-Draft D. Caviglia
Intended status: Standards Track Ericsson Intended status: Standards Track Ericsson
Expires: October 15, 2012 F. Zhang Expires: February 28, 2013 F. Zhang
D. Li D. Li
Huawei Technologies Huawei Technologies
S. Belotti S. Belotti
P. Grandi P. Grandi
Alcatel-Lucent Alcatel-Lucent
R. Rao R. Rao
K. Pithewan K. Pithewan
Infinera Corporation Infinera Corporation
J. Drake J. Drake
Juniper Juniper
April 13, 2012 August 27, 2012
Traffic Engineering Extensions to OSPF for Generalized MPLS (GMPLS) Traffic Engineering Extensions to OSPF for Generalized MPLS (GMPLS)
Control of Evolving G.709 OTN Networks Control of Evolving G.709 OTN Networks
draft-ietf-ccamp-gmpls-ospf-g709v3-02 draft-ietf-ccamp-gmpls-ospf-g709v3-03
Abstract Abstract
The recent revision of ITU-T Recommendation G.709 [G709-V3] has The recent revision of ITU-T Recommendation G.709 [G709-V3] has
introduced new fixed and flexible ODU containers, enabling optimized introduced new fixed and flexible ODU containers, enabling optimized
support for an increasingly abundant service mix. support for an increasingly abundant service mix.
This document describes OSPF routing protocol extensions to support This document describes OSPF routing protocol extensions to support
Generalized MPLS (GMPLS) control of all currently defined ODU Generalized MPLS (GMPLS) control of all currently defined ODU
containers, in support of both sub-lambda and lambda level routing containers, in support of both sub-lambda and lambda level routing
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Internet-Drafts are working documents of the Internet Engineering Internet-Drafts are working documents of the Internet Engineering
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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 October 15, 2012. This Internet-Draft will expire on February 28, 2013.
Copyright Notice Copyright Notice
Copyright (c) 2012 IETF Trust and the persons identified as the Copyright (c) 2012 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
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1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . . 3 1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . . 3
1.1. Terminology . . . . . . . . . . . . . . . . . . . . . . . 3 1.1. Terminology . . . . . . . . . . . . . . . . . . . . . . . 3
2. OSPF-TE Extensions . . . . . . . . . . . . . . . . . . . . . . 3 2. OSPF-TE Extensions . . . . . . . . . . . . . . . . . . . . . . 3
3. TE-Link Representation . . . . . . . . . . . . . . . . . . . . 4 3. TE-Link Representation . . . . . . . . . . . . . . . . . . . . 4
4. ISCD format extensions . . . . . . . . . . . . . . . . . . . . 5 4. ISCD format extensions . . . . . . . . . . . . . . . . . . . . 5
4.1. Switch Capability Specific Information . . . . . . . . . . 7 4.1. Switch Capability Specific Information . . . . . . . . . . 7
5. Examples . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 5. Examples . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
5.1. MAX LSP Bandwidth fields in the ISCD . . . . . . . . . . . 13 5.1. MAX LSP Bandwidth fields in the ISCD . . . . . . . . . . . 13
5.2. Example of T,S and TSG utilization . . . . . . . . . . . . 15 5.2. Example of T,S and TSG utilization . . . . . . . . . . . . 15
5.2.1. Example of different TSGs . . . . . . . . . . . . . . 16 5.2.1. Example of different TSGs . . . . . . . . . . . . . . 16
5.3. Example of ODUflex advertisement . . . . . . . . . . . . . 17 5.3. Example of ODUflex advertisement . . . . . . . . . . . . . 18
5.4. Example of single stage muxing . . . . . . . . . . . . . . 19 5.4. Example of single stage muxing . . . . . . . . . . . . . . 20
5.5. Example of multi stage muxing - Unbundled link . . . . . . 21 5.5. Example of multi stage muxing - Unbundled link . . . . . . 22
5.6. Example of multi stage muxing - Bundled links . . . . . . 22 5.6. Example of multi stage muxing - Bundled links . . . . . . 23
5.7. Example of component links with non homogeneous 5.7. Example of component links with non homogeneous
hierarchies . . . . . . . . . . . . . . . . . . . . . . . 24 hierarchies . . . . . . . . . . . . . . . . . . . . . . . 25
6. Compatibility . . . . . . . . . . . . . . . . . . . . . . . . 26 6. Compatibility . . . . . . . . . . . . . . . . . . . . . . . . 27
7. Security Considerations . . . . . . . . . . . . . . . . . . . 26 7. Security Considerations . . . . . . . . . . . . . . . . . . . 27
8. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 26 8. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 27
9. Contributors . . . . . . . . . . . . . . . . . . . . . . . . . 27 9. Contributors . . . . . . . . . . . . . . . . . . . . . . . . . 28
10. Acknowledgements . . . . . . . . . . . . . . . . . . . . . . . 28 10. Acknowledgements . . . . . . . . . . . . . . . . . . . . . . . 29
11. References . . . . . . . . . . . . . . . . . . . . . . . . . . 28 11. References . . . . . . . . . . . . . . . . . . . . . . . . . . 29
11.1. Normative References . . . . . . . . . . . . . . . . . . . 28 11.1. Normative References . . . . . . . . . . . . . . . . . . . 29
11.2. Informative References . . . . . . . . . . . . . . . . . . 29 11.2. Informative References . . . . . . . . . . . . . . . . . . 30
Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . . 30 Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . . 31
1. Introduction 1. Introduction
G.709 OTN [G709-V3] includes new fixed and flexible ODU containers, G.709 OTN [G709-V3] includes new fixed and flexible ODU containers,
two types of Tributary Slots (i.e., 1.25Gbps and 2.5Gbps), and two types of Tributary Slots (i.e., 1.25Gbps and 2.5Gbps), and
supports various multiplexing relationships (e.g., ODUj multiplexed supports various multiplexing relationships (e.g., ODUj multiplexed
into ODUk (j<k)), two different tributary slots for ODUk (K=1, 2, 3) into ODUk (j<k)), two different tributary slots for ODUk (K=1, 2, 3)
and ODUflex service type, which is being standardized in ITU-T. In and ODUflex service type, which is being standardized in ITU-T. In
order to present this information in the routing process, this order to present this information in the routing process, this
document provides OTN technology specific encoding for OSPF-TE. document provides OTN technology specific encoding for OSPF-TE.
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+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|Sig type=ODU1 | #stages= 2 |T|S| 3 | Res |1|0|0|1|0|0|0|0| |Sig type=ODU1 | #stages= 2 |T|S| 3 | Res |1|0|0|1|0|0|0|0|
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Stage#1=ODU2 | Stage#2=ODU3 | Padding | | Stage#1=ODU2 | Stage#2=ODU3 | Padding |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Unres ODU1 at Prio 0 | Unres ODU1 at Prio 3 | | Unres ODU1 at Prio 0 | Unres ODU1 at Prio 3 |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
Figure 10: Example 2.1 - Different TSGs utilization Figure 10: Example 2.1 - Different TSGs utilization
A particular case in which hierarchies with the same muxing tree but
with different exported TSG must be considered as non homogenous
hierarchies is the case in which an H-LPS and the client LSP are
terminated on the same egress node. What can happen is that a loose
ero is used at the hop where the signaled LSP is nested into the
H-LSP (penultimate hop of the LSP).
In the following figure, node C receives from A a loose ERO towards
node E and must choose between the ODU2 H-LSP on if1 or the one on
if2. In case the H-LSP on if1 exports a TS=1,25Gbps and if2 a
TS=2,5Gbps and the service LSP being signaled needs a 1,25Gbps
tributary slot, only the H-LSP on if1 can be used to reach node E.
For further details please see section 4.1 of the [OTN-INFO].
ODU0-LSP
..........................................................+
| |
| ODU2-H-LSP |
| +-------------------------------+
| | |
+--+--+ +-----+ +-----+ if1 +-----+ +-----+
| | OTU3 | | OTU3 | |---------| |---------| |
| A +------+ B +------+ C | if2 | D | | E |
| | | | | |---------| |---------| |
+-----+ +-----+ +-----+ +-----+ +-----+
... Service LSP
--- H-LSP
Figure 11: Example - Service LSP and H-LSP terminating on the same
node
5.3. Example of ODUflex advertisement 5.3. Example of ODUflex advertisement
In this example the advertisement of an ODUflex->ODU3 hierarchy is In this example the advertisement of an ODUflex->ODU3 hierarchy is
shown. In case of ODUflex advertisement the MAX LSP bandwidth needs shown. In case of ODUflex advertisement the MAX LSP bandwidth needs
to be advertised and in some cases also information about the to be advertised and in some cases also information about the
Unreserved bandwidth could be useful. The amount of Unreserved Unreserved bandwidth could be useful. The amount of Unreserved
bandwidth does not give a clear indication of how many ODUflex LSP bandwidth does not give a clear indication of how many ODUflex LSP
can be set up either at the MAX LSP Bandwidth or at different rates, can be set up either at the MAX LSP Bandwidth or at different rates,
as it gives no information about the spatial allocation of the free as it gives no information about the spatial allocation of the free
TSs. TSs.
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+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| MAX LSP Bandwidth at priority 4 | | MAX LSP Bandwidth at priority 4 |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| MAX LSP Bandwidth at priority 5 | | MAX LSP Bandwidth at priority 5 |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| MAX LSP Bandwidth at priority 6 | | MAX LSP Bandwidth at priority 6 |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| MAX LSP Bandwidth at priority 7 | | MAX LSP Bandwidth at priority 7 |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
Figure 11: Example 3 - ODUflex advertisement Figure 12: Example 3 - ODUflex advertisement
5.4. Example of single stage muxing 5.4. Example of single stage muxing
Supposing there is 1 OTU4 component link supporting single stage Supposing there is 1 OTU4 component link supporting single stage
muxing of ODU1, ODU2, ODU3 and ODUflex, the supported hierarchy can muxing of ODU1, ODU2, ODU3 and ODUflex, the supported hierarchy can
be summarized in a tree as in the following figure. For sake of be summarized in a tree as in the following figure. For sake of
simplicity we assume that also in this case only priorities 0 and 3 simplicity we assume that also in this case only priorities 0 and 3
are supported. are supported.
ODU1 ODU2 ODU3 ODUflex ODU1 ODU2 ODU3 ODUflex
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| Stage#1=ODU4 | Padding | | Stage#1=ODU4 | Padding |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Unreserved Bandwidth at priority 0 =100Gbps | | Unreserved Bandwidth at priority 0 =100Gbps |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Unreserved Bandwidth at priority 3 =100Gbps | | Unreserved Bandwidth at priority 3 =100Gbps |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| MAX LSP Bandwidth at priority 0 =100Gbps | | MAX LSP Bandwidth at priority 0 =100Gbps |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| MAX LSP Bandwidth at priority 3 =100Gbps | | MAX LSP Bandwidth at priority 3 =100Gbps |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
Figure 12: Example 4 - Single stage muxing Figure 13: Example 4 - Single stage muxing
5.5. Example of multi stage muxing - Unbundled link 5.5. Example of multi stage muxing - Unbundled link
Supposing there is 1 OTU4 component link with muxing capabilities as Supposing there is 1 OTU4 component link with muxing capabilities as
shown in the following figure: shown in the following figure:
ODU2 ODU0 ODUflex ODU0 ODU2 ODU0 ODUflex ODU0
\ / \ / \ / \ /
| | | |
ODU3 ODU2 ODU3 ODU2
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+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Unreserved Bandwidth at priority 0 =100Gbps | | Unreserved Bandwidth at priority 0 =100Gbps |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Unreserved Bandwidth at priority 3 =100Gbps | | Unreserved Bandwidth at priority 3 =100Gbps |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| MAX LSP Bandwidth at priority 0 =10Gbps | | MAX LSP Bandwidth at priority 0 =10Gbps |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| MAX LSP Bandwidth at priority 3 =10Gbps | | MAX LSP Bandwidth at priority 3 =10Gbps |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
Figure 13: Example 5 - Multi stage muxing - Unbundled link Figure 14: Example 5 - Multi stage muxing - Unbundled link
5.6. Example of multi stage muxing - Bundled links 5.6. Example of multi stage muxing - Bundled links
In this example 2 OTU4 component links with the same supported TSG In this example 2 OTU4 component links with the same supported TSG
and homogeneous muxing hierarchies are considered. The following and homogeneous muxing hierarchies are considered. The following
muxing capabilities trees are supported: muxing capabilities trees are supported:
Component Link#1 Component Link#2 Component Link#1 Component Link#2
ODU2 ODU0 ODU2 ODU0 ODU2 ODU0 ODU2 ODU0
\ / \ / \ / \ /
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| Unres ODU2 at Prio 0 =16 | Unres ODU2 at Prio 3 =16 | | Unres ODU2 at Prio 0 =16 | Unres ODU2 at Prio 3 =16 |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Type = 1 (Unres-fix) | Length | | Type = 1 (Unres-fix) | Length |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|Sig type=ODU0 | #stages= 2 |T|S| TSG | Res |1|0|0|1|0|0|0|0| |Sig type=ODU0 | #stages= 2 |T|S| TSG | Res |1|0|0|1|0|0|0|0|
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Stage#1=ODU3 | Stage#2=ODU4 | Padding | | Stage#1=ODU3 | Stage#2=ODU4 | Padding |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Unres ODU0 at Prio 0 =128 | Unres ODU0 at Prio 3 =128 | | Unres ODU0 at Prio 0 =128 | Unres ODU0 at Prio 3 =128 |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
Figure 14: Example 6 - Multi stage muxing - Bundled links Figure 15: Example 6 - Multi stage muxing - Bundled links
5.7. Example of component links with non homogeneous hierarchies 5.7. Example of component links with non homogeneous hierarchies
In this example 2 OTU4 component links with the same supported TSG In this example 2 OTU4 component links with the same supported TSG
and non homogeneous muxing hierarchies are considered. The following and non homogeneous muxing hierarchies are considered. The following
muxing capabilities trees are supported: muxing capabilities trees are supported:
Component Link#1 Component Link#2 Component Link#1 Component Link#2
ODU2 ODU0 ODU1 ODU0 ODU2 ODU0 ODU1 ODU0
\ / \ / \ / \ /
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| Unres ODU1 at Prio 0 =40 | Unres ODU1 at Prio 3 =40 | | Unres ODU1 at Prio 0 =40 | Unres ODU1 at Prio 3 =40 |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Type = 1 (Unres-fix) | Length | | Type = 1 (Unres-fix) | Length |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|Sig type=ODU0 | #stages= 2 |T|S| TSG | Res |1|0|0|1|0|0|0|0| |Sig type=ODU0 | #stages= 2 |T|S| TSG | Res |1|0|0|1|0|0|0|0|
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Stage#1=ODU2 | Stage#2=ODU4 | Padding | | Stage#1=ODU2 | Stage#2=ODU4 | Padding |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Unres ODU0 at Prio 0 =80 | Unres ODU0 at Prio 3 =80 | | Unres ODU0 at Prio 0 =80 | Unres ODU0 at Prio 3 =80 |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
Figure 15: Example 7 - Multi stage muxing - Non homogeneous Figure 16: Example 7 - Multi stage muxing - Non homogeneous
hierarchies hierarchies
6. Compatibility 6. Compatibility
All implementations of this document MUST support advertisements as All implementations of this document MAY support also advertisement
defined in this document and [RFC4328]. Implementations SHOULD as defined in [RFC4328]. When nodes support both advertisement
support the configuration of which advertisement procedures are methods, implementations MUST support the configuration of which
followed. This approach enables the use of one type of advertisement method is followed. The choice of which is used is
advertisements when only type is needed, and the differentiation of based on policy and is out of scope of the document. This enables
legacy nodes and nodes supporting this document when both are nodes following each method to identify similar supporting nodes and
operating in the same network. compute paths using only the appropriate nodes.
7. Security Considerations 7. Security Considerations
This document specifies the contents of Opaque LSAs in OSPFv2. As This document specifies the contents of Opaque LSAs in OSPFv2. As
Opaque LSAs are not used for SPF computation or normal routing, the Opaque LSAs are not used for SPF computation or normal routing, the
extensions specified here have no direct effect on IP routing. extensions specified here have no direct effect on IP routing.
Tampering with GMPLS TE LSAs may have an effect on the underlying Tampering with GMPLS TE LSAs may have an effect on the underlying
transport (optical and/or SONET-SDH) network. [RFC3630] suggests transport (optical and/or SONET-SDH) network. [RFC3630] suggests
mechanisms such as [RFC2154] to protect the transmission of this mechanisms such as [RFC2154] to protect the transmission of this
information, and those or other mechanisms should be used to secure information, and those or other mechanisms should be used to secure
skipping to change at page 27, line 15 skipping to change at page 28, line 15
9. Contributors 9. Contributors
Xiaobing Zi, Huawei Technologies Xiaobing Zi, Huawei Technologies
Email: zixiaobing@huawei.com Email: zixiaobing@huawei.com
Francesco Fondelli, Ericsson Francesco Fondelli, Ericsson
Email: francesco.fondelli@ericsson.com Email: francesco.fondelli@ericsson.com
Marco Corsi, Altran Italia Marco Corsi
EMail: corsi.marco@gmail.com EMail: corsi.marco@gmail.com
Eve Varma, Alcatel-Lucent Eve Varma, Alcatel-Lucent
EMail: eve.varma@alcatel-lucent.com EMail: eve.varma@alcatel-lucent.com
Jonathan Sadler, Tellabs Jonathan Sadler, Tellabs
EMail: jonathan.sadler@tellabs.com EMail: jonathan.sadler@tellabs.com
skipping to change at page 28, line 20 skipping to change at page 29, line 20
Jonathan.Hardwick@metaswitch.com Jonathan.Hardwick@metaswitch.com
Xihua Fu Xihua Fu
fu.xihua@zte.com.cn fu.xihua@zte.com.cn
Cyril Margaria Cyril Margaria
cyril.margaria@nsn.com cyril.margaria@nsn.com
Malcolm Betts
Malcolm.betts@zte.com.cn
10. Acknowledgements 10. Acknowledgements
The authors would like to thank Fred Gruman for the precious comments The authors would like to thank Fred Gruman and Lou Berger for the
and suggestions. precious comments and suggestions.
11. References 11. References
11.1. Normative References 11.1. Normative References
[OTN-FWK] F.Zhang, D.Li, H.Li, S.Belotti, D.Ceccarelli, "Framework [OTN-FWK] F.Zhang, D.Li, H.Li, S.Belotti, D.Ceccarelli, "Framework
for GMPLS and PCE Control of G.709 Optical Transport for GMPLS and PCE Control of G.709 Optical Transport
networks, work in progress networks, work in progress
draft-ietf-ccamp-gmpls-g709-framework-05", September 2011. draft-ietf-ccamp-gmpls-g709-framework-05", September 2011.
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