Internet Engineering Task Force G.Galimberti, Ed.
Internet-Draft Cisco
Intended status: Standards Track R.Kunze, Ed.
Expires: January 7, 2016 Deutsche Telekom
Kam Lam, Ed.
Alcatel-Lucent
D. Hiremagalur, Ed.
Juniper
L.Fang, Ed.
G.Ratterree, Ed.
Microsoft
July 6, 2015
An SNMP MIB extension to RFC3591 to manage optical interface parameters
of "G.698.2 single channel" in DWDM applications
draft-galikunze-ccamp-g-698-2-snmp-mib-12
Abstract
This memo defines a module of the Management Information Base (MIB)
used by Simple Network Management Protocol (SNMP) in TCP/IP- based
internet. In particular, it defines objects for managing single
channel optical interface parameters of DWDM applications, using the
approach specified in G.698.2 [ITU.G698.2] . This interface,
described in ITU-T G.872, G.709 and G.798, is one type of OTN multi-
vendor Intra-Domain Interface (IaDI). This RFC is an extension of
RFC3591 to support the optical parameters specified in ITU-T G.698.2
and application identifiers specified in ITU-T G.874.1 [ITU.G874.1].
Note that G.874.1 encompasses vendor-specific codes, which if used
would make the interface a single vendor IaDI and could still be
managed.
The MIB module defined in this memo can be used for Optical
Parameters monitoring and/or configuration of the endpoints of the
multi-vendor IaDI based on the Black Link approach.
Copyright Notice
Copyright (c) 2015 IETF Trust and the persons identified as the
document authors. All rights reserved.
Status of This Memo
This Internet-Draft is submitted in full conformance with the
provisions of BCP 78 and BCP 79.
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Copyright Notice
Copyright (c) 2015 IETF Trust and the persons identified as the
document authors. All rights reserved.
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Table of Contents
1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . 3
2. The Internet-Standard Management Framework . . . . . . . . . 4
3. Conventions . . . . . . . . . . . . . . . . . . . . . . . . . 5
4. Overview . . . . . . . . . . . . . . . . . . . . . . . . . . 5
4.1. Use Cases . . . . . . . . . . . . . . . . . . . . . . . . 6
4.2. Optical Parameters Description . . . . . . . . . . . . . 13
4.2.1. Rs-Ss Configuration . . . . . . . . . . . . . . . . . 13
4.2.2. Table of Application Identifiers . . . . . . . . . . 14
4.3. Use of ifTable . . . . . . . . . . . . . . . . . . . . . 15
4.3.1. Use of ifTable for OPS Layer . . . . . . . . . . . . 16
4.3.2. Use of ifTable for OCh Layer . . . . . . . . . . . . 17
4.3.3. Use of ifStackTable . . . . . . . . . . . . . . . . . 17
5. Structure of the MIB Module . . . . . . . . . . . . . . . . . 18
6. Object Definitions . . . . . . . . . . . . . . . . . . . . . 18
7. Relationship to Other MIB Modules . . . . . . . . . . . . . . 25
7.1. Relationship to the [TEMPLATE TODO] MIB . . . . . . . . . 25
7.2. MIB modules required for IMPORTS . . . . . . . . . . . . 25
8. Definitions . . . . . . . . . . . . . . . . . . . . . . . . . 25
9. Security Considerations . . . . . . . . . . . . . . . . . . . 25
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10. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 26
11. Contributors . . . . . . . . . . . . . . . . . . . . . . . . 26
12. References . . . . . . . . . . . . . . . . . . . . . . . . . 27
12.1. Normative References . . . . . . . . . . . . . . . . . . 27
12.2. Informative References . . . . . . . . . . . . . . . . . 29
Appendix A. Change Log . . . . . . . . . . . . . . . . . . . . . 30
Appendix B. Open Issues . . . . . . . . . . . . . . . . . . . . 30
Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . 30
1. Introduction
This memo defines a portion of the Management Information Base (MIB)
used by Simple Network Management Protocol (SNMP)in TCP/IP-based
internets. In particular, it defines objects for managing single
channel optical interface parameters of DWDM applications, using the
approach specified in G.698.2. This RFC is an extension of RFC3591
to support the optical parameters specified in ITU-T G.698.2
[ITU.G698.2] and application identifiers specified in ITU-T G.874.1
[ITU.G874.1] . Note that G.874.1 encompasses vendor-specific codes,
which if used would make the interface a single vendor IaDI and could
still be managed.
The Black Link approach allows supporting an optical transmitter/
receiver pair of one vendor to inject an optical tributary signal and
run it over an optical network composed of amplifiers, filters, add-
drop multiplexers from a different vendor. In the OTN architecture,
the 'black-link' represents a pre-certified network media channel
conforming to G.698.2 specifications at the S and R reference points.
[Editor's note: In G.698.2 this corresponds to the optical path from
point S to R; network media channel is also used and explained in
draft-ietf-ccamp-flexi-grid-fwk-02]
Management will be performed at the edges of the network media
channel (i.e., at the transmitters and receivers attached to the S
and R reference points respectively) for the relevant parameters
specified in G.698.2 [ITU.G698.2], G.798 [ITU.G798], G.874
[ITU.G874], and the performance parameters specified in G.7710/Y.1701
[ITU-T G.7710] and G.874.1 [ITU.G874.1].
G.698.2 [ITU.G698.2] is primarily intended for metro applications
that include optical amplifiers. Applications are defined in G.698.2
[ITU.G698.2] using optical interface parameters at the single-channel
connection points between optical transmitters and the optical
multiplexer, as well as between optical receivers and the optical
demultiplexer in the DWDM system. This Recommendation uses a
methodology which does not explicitly specify the details of the
optical network between reference point Ss and Rs, e.g., the passive
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and active elements or details of the design. The Recommendation
currently includes unidirectional DWDM applications at 2.5 and 10
Gbit/s (with 100 GHz and 50 GHz channel frequency spacing). Work is
still under way for 40 and 100 Gbit/s interfaces. There is
possibility for extensions to a lower channel frequency spacing.
This document specifically refers to the "application code" defined
in the G.698.2 [ITU.G698.2] and included in the Application
Identifier defined in G.874.1 [ITU.G874.1] and G.872 [ITU.G872], plus
a few optical parameters not included in the G.698.2 application code
specification.
This draft refers and supports also the draft-kunze-g-698-2-
management-control-framework
The building of an SNMP MIB describing the optical parameters defined
in G.698.2 [ITU.G698.2], and reflected in G.874.1 [ITU.G874], allows
the different vendors and operator to retrieve, provision and
exchange information across the G.698.2 multi-vendor IaDI in a
standardized way.
The MIB, reporting the Optical parameters and their values,
characterizes the features and the performances of the optical
components and allow a reliable black link design in case of multi
vendor optical networks.
Although RFC 3591 [RFC3591] describes and defines the SNMP MIB of a
number of key optical parameters, alarms and Performance Monitoring,
as this RFC is over a decade old, it is primarily pre-OTN, and a more
complete and up-to-date description of optical parameters and
processes can be found in the relevant ITU-T Recommendations. The
same considerations can be applied to the RFC 4054 [RFC4054]
2. The Internet-Standard Management Framework
For a detailed overview of the documents that describe the current
Internet-Standard Management Framework, please refer to section 7 of
RFC 3410 [RFC3410].
Managed objects are accessed via a virtual information store, termed
the Management Information Base or MIB. MIB objects are generally
accessed through the Simple Network Management Protocol (SNMP).
Objects in the MIB are defined using the mechanisms defined in the
Structure of Management Information (SMI). This memo specifies a MIB
module that is compliant to the SMIv2, which is described in STD 58,
RFC 2578 [RFC2578], STD 58, RFC 2579 [RFC2579] and STD 58, RFC 2580
[RFC2580].
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3. Conventions
The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT",
"SHOULD", "SHOULD NOT", "RECOMMENDED", "MAY", and "OPTIONAL" in this
document are to be interpreted as described in RFC 2119 [RFC2119] In
the description of OIDs the convention: Set (S) Get (G) and Trap (T)
conventions will describe the action allowed by the parameter.
4. Overview
Figure 1 shows a set of reference points, for the linear "black link"
approach, for single-channel connection (Ss and Rs) between
transmitters (Tx) and receivers (Rx). Here the DWDM network elements
include an OM and an OD (which are used as a pair with the opposing
element), one or more optical amplifiers and may also include one or
more OADMs.
+-------------------------------------------------+
Ss | DWDM Network Elements | Rs
+---+ | | | \ / | | | +--+
Tx L1----|->| \ +------+ +------+ / |--|-->Rx L1
+---+ | | | | | +------+ | | | | | +--+
+---+ | | | | | | | | | | | | +--+
Tx L2----|->| OM |-->|------|->| OADM |--|------|->| OD |--|-->Rx L2
+---+ | | | | | | | | | | | | +--+
+---+ | | | | | +------+ | | | | | +--+
Tx L3----|->| / | DWDM | | ^ | DWDM | \ |--|-->Rx L3
+---+ | | / | Link +----|--|----+ Link | \ | | +--+
+-----------+ | | +----------+
+--+ +--+
| |
Rs v | Ss
+-----+ +-----+
|RxLx | |TxLx |
+-----+ +-----+
Ss = reference point at the DWDM network element tributary output
Rs = reference point at the DWDM network element tributary input
Lx = Lambda x
OM = Optical Mux
OD = Optical Demux
OADM = Optical Add Drop Mux
from Fig. 5.1/G.698.2
Figure 1: Linear Black Link approach
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G.698.2 [ITU.G698.2] defines also Ring "Black Link" approach
configurations [Fig. 5.2/G.698.2] and Linear "black link" approach
for Bidirectional applications[Fig. 5.3/G.698.2]
4.1. Use Cases
The use cases described below are assuming that power monitoring
functions are available in the ingress and egress network element of
the DWDM network, respectively. By performing link property
correlation it would be beneficial to include the current transmit
power value at reference point Ss and the current received power
value at reference point Rs. For example if the Client transmitter
power (OXC1) has a value of 0dBm and the ROADM interface measured
power (at OLS1) is -6dBm the fiber patch cord connecting the two
nodes may be pinched or the connectors are dirty. More, the
interface characteristics can be used by the OLS network Control
Plane in order to check the Optical Channels feasibility. Finally
the OXC1 transceivers parameters (Application Code) can be shared
with OXC2 using the LMP protocol to verify the Transceivers
compatibility. The actual route selection of a specific wavelength
within the allowed set is outside the scope of LMP. In GMPLS, the
parameter selection (e.g. central frequency) is performed by RSVP-TE.
G.698.2 defines a single channel optical interface for DWDM systems
that allows interconnecting network-external optical transponders
across a DWDM network. The optical transponders are considered to be
external to the DWDM network. This so-called 'black link' approach
illustrated in Figure 5-1 of G.698.2 and a copy of this figure is
provided below. The single channel fiber link between the Ss/Rs
reference points and the ingress/egress port of the network element
on the domain boundary of the DWDM network (DWDM border NE) is called
access link in this contribution. Based on the definition in G.698.2
it is considered to be part of the DWDM network. The access link
typically is realized as a passive fiber link that has a specific
optical attenuation (insertion loss). As the access link is an
integral part of the DWDM network, it is desirable to monitor its
attenuation. Therefore, it is useful to detect an increase of the
access link attenuation, for example, when the access link fiber has
been disconnected and reconnected (maintenance) and a bad patch panel
connection (connector) resulted in a significantly higher access link
attenuation (loss of signal in the extreme case of an open connector
or a fiber cut). In the following section, two use cases are
presented and discussed:
1) pure access link monitoring
2) access link monitoring with a power control loop
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These use cases require a power monitor as described in G.697 (see
section 6.1.2), that is capable to measure the optical power of the
incoming or outgoing single channel signal. The use case where a
power control loop is in place could even be used to compensate an
increased attenuation as long as the optical transmitter can still be
operated within its output power range defined by its application
code.
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Figure 2 Access Link Power Monitoring
+--------------------------+
| P(in) = P(Tx) - a(Tx) |
| ___ |
+----------+ | \ / Power Monitor |
| | P(Tx) | V |
| +----+ | Ss //\\ | | |\ |
| | TX |----|-----\\//------------------->| \ |
| +----+ | Access Link (AL-T) | . | | |
| | attenuation a(Tx) | . | |==============>
| | | . | | |
| External | | --->| / |
| Optical | | |/ |
|Transpond.| | P(out) |
| | | ___ |
| | | \ / Power Monitor |
| | P(Rx) | V |
| +----+ | Rs //\\ | | |\ |
| | RX |<---|-----\\//--------------------| \ |
| +----+ | Access Link (AL-R) | . | | |
| | Attenuation a(Rx) | . | |<==============
+----------+ | . | | |
| <---| / |
P(Rx) = P(out) - a(Rx) | |/ |
| |
| ROADM |
+--------------------------+
- For AL-T monitoring: P(Tx) and a(Tx) must be known
- For AL-R monitoring: P(RX) and a(Rx) must be known
An alarm shall be raised if P(in) or P(Rx) drops below a
configured threshold (t [dB]):
- P(in) < P(Tx) - a(Tx) - t (Tx direction)
- P(Rx) < P(out) - a(Rx) - t (Rx direction)
- a(Tx) =| a(Rx)
Figure 2: Extended LMP Model
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Pure Access Link (AL) Monitoring Use Case
Figure 4 illustrates the access link monitoring use case and the
different physical properties involved that are defined below:
- Ss, Rs: G.698.2 reference points
- P(Tx): current optical output power of transmitter Tx
- a(Tx): access link attenuation in Tx direction (external
transponder point of view)
- P(in): measured current optical input power at the input port
of border DWDM NE
- t: user defined threshold (tolerance)
- P(out): measured current optical output power at the output
port of border DWDM NE
- a(Rx): access link attenuation in Rx direction (external
transponder point of view)
- P(Rx): current optical input power of receiver Rx
Assumptions:
- The access link attenuation in both directions (a(Tx), a(Rx))
is known or can be determined as part of the commissioning
process. Typically, both values are the same.
- A threshold value t has been configured by the operator. This
should also be done during commissioning.
- A control plane protocol is in place that allows
to periodically send the optical power values P(Tx) and P(Rx)
to the control plane protocol instance on the DWDM border NE.
This is llustrated in Figure 3.
- The DWDM border NE is capable to periodically measure the optical
power Pin and Pout as defined in G.697 by power monitoring points
depicted as yellow triangles in the figures below.
AL monitoring process:
- Tx direction: the measured optical input power Pin is compared
with the expected optical input power P(Tx) - a(Tx). If the
measured optical input power P(in) drops below the value
(P(Tx) - a(Tx) - t) a low power alarm shall be raised indicating
that the access link attenuation has exceeded a(Tx) + t.
- Rx direction: the measured optical input power P(Rx) is
compared with the expected optical input power P(out) - a(Rx).
If the measured optical input power P(Rx) drops below the value
(P(out) - a(Rx) - t) a
low power alarm shall be raised indicating that the access link
attenuation has exceeded a(Rx) + t.
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Figure 3 Use case 1: Access Link power monitoring
+----------+ +--------------------------+
| +------+ | P(Tx), P(Rx) | +-------+ |
| | | | =================> | | | |
| | LMP | | P(in), P(out) | | LMP | |
| | | | <================= | | | |
| +------+ | | +-------+ |
| | | |
| | | P(in) - P(Tx) - a(Tx) |
| | | ___ |
| | | \ / Power Monitor |
| | P(Tx) | V |
| +----+ | Ss //\\ | | |\ |
| | TX |----|-----\\//------------------->| \ |
| +----+ | Access Link (AL-T) | . | | |
| | attenuation a(Tx) | . | |==============>
| | | . | | |
| External | | --->| / |
| Optical | | |/ |
|Transpond.| | P(out) |
| | | ___ |
| | | \ / Power Monitor |
| | P(Rx) | V |
| +----+ | Rs //\\ | | |\ |
| | RX |<---|-----\\//--------------------| \ |
| +----+ | Access Link (AL-R) | . | | |
| | Attenuation a(Rx) | . | |<==============
+----------+ | . | | |
| <---| / |
P(Rx) = P(out) - a(Rx) | |/ |
| |
| ROADM |
+--------------------------+
- For AL-T monitoring: P(Tx) and a(Tx) must be known
- For AL-R monitoring: P(RX) and a(Rx) must be known
An alarm shall be raised if P(in) or P(Rx) drops below a
configured threshold (t [dB]):
- P(in) < P(Tx) - a(Tx) - t (Tx direction)
- P(Rx) < P(out) - a(Rx) - t (Rx direction)
- a(Tx) = a(Rx)
Figure 3: Extended LMP Model
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Power Control Loop Use Case
This use case is based on the access link monitoring use case as
described above. In addition, the border NE is running a power
control application that is capable to control the optical output
power of the single channel tributary signal at the output port
of the border DWDM NE (towards the external receiver Rx) and the
optical output power of the single channel tributary signal at
the external transmitter Tx within their known operating range.
The time scale of this control loop is typically relatively slow
(e.g. some 10s or minutes) because the access link attenuation
is not expected to vary much over time (the attenuation only
changes when re-cabling occurs).
From a data plane perspective, this use case does not require
additional data plane extensions. It does only require a protocol
extension in the control plane (e.g. this LMP draft) that allows
the power control application residing in the DWDM border NE to
modify the optical output power of the DWDM domain-external
transmitter Tx within the range of the currently used application
code. Figure 5 below illustrates this use case utilizing the LMP
protocol with extensions defined in this draft.
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Figure 4 Use case 2: Power Control Loop
+----------+ +--------------------------+
| +------+ | P(Tx),P(Rx),Set(Pout) | +-------+ +--------+ |
| | | | ====================> | | | | Power | |
| | LMP | | P(in),P(out),Set(PTx) | | LMP | |Control | |
| | | | <==================== | | | | Loop | |
| +------+ | | +-------+ +--------+ |
| | | | |
| +------+ | | P(in) = P(Tx) - a(Tx) |
| |C.Loop| | | ___ |
| +------+ | | \ / Power Monitor |
| | | P(Tx) | V |
| +------+ | Ss //\\ | | |\ |
| | TX |>---|-----\\//---------------------->| \ |
| +------+ | Access Link (AL-T) | . | | |
| VOA(Tx) | attenuation a(Tx) | . | |==============>
| | | . | | |
| External | | --->| / |
| Optical | | |/ |
|Transpond.| | P(out) |
| | | ___ |
| | | \ / Power Monitor |
| | P(Rx) | V |
| +----+ | Rs //\\ | | VOA(out) |\ |
| | RX |<---|-----\\//---------------------<|-------| \ |
| +----+ | Access Link (AL-R) | . | | |
| | attenuation a(Rx) | . | |<=======
+----------+ | VOA(out) | | |
| <--<|-------| / |
P(Rx) = P(out) - a(Rx) | |/ |
| |
| ROADM |
+--------------------------+
The Power Control Loops in Transponder and ROADM regulate
the Variable Optical Attenuators (VOA) to adjust the
proper power in base of the ROADM and Receiver
caracteristics and the Access Link attenuation
Figure 4: Extended LMP Model
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4.2. Optical Parameters Description
The G.698.2 pre-certified network media channels are managed at the
edges, i.e. at the transmitters (Tx) and receivers (Rx) attached to
the S and R reference points respectively. The set of parameters
that could be managed are specified in G.698.2 [ITU.G698.2] section
5.3 referring the "application code" notation
The definitions of the optical parameters are provided below to
increase the readability of the document, where the definition is
ended by (G) the parameter can be retrieve with a GET, when (S) it
can be provisioned by a SET, (G,S) can be either GET and SET.
To support the management of these parameters, the SNMP MIB in RFC
3591 [RFC3591] is extended with a new MIB module defined in section 6
of this document. This new MIB module includes the definition of new
configuration table of the OCh Layer for the parameters at Tx (S) and
Rx (R).
4.2.1. Rs-Ss Configuration
The Rs-Ss configuration table allows configuration of Central
Frequency, Power and Application identifiers as described in
[ITU.G698.2] and G.694.1 [ITU.G694.1]
This parameter report the current Transceiver Output power, it can be
either a setting and measured value (G, S).
Central frequency (see G.694.1 Table 1):
This parameter indicates the central frequency value that Ss and
Rs will be set, to work (in THz), in particular Section 6/G.694.1
(G, S).
Single-channel application identifiers (see G.698.2):
This parameter indicates the transceiver application identifier at
Ss and Rs as defined in [ITU.G698.2] Chapter 5.4 - this parameter
can be called Optical Interface Identifier OII as per [draft-
martinelli-wson-interface-class] (G).
Number of Single-channel application identifiers Supported
This parameter indicates the number of Single-channel application
codes supported by this interface (G).
Current Laser Output power:
This parameter report the current Transceiver Output power, see
RFC3591.
Current Laser Input power:
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This parameter report the current Transceiver Input power see
RFC3591.
+---------------------------------------------+---------+-----------+
| PARAMETERS | Get/Set | Reference |
+---------------------------------------------+---------+-----------+
| Central Frequency | G,S | G.694.1 |
| | | S.6 |
| Single-channel Application Identifier | G | G.874.1 |
| number in use | | |
| Single-channel Application Identifier Type | G | G.874.1 |
| in use | | |
| Single-channel Application Identifier in | G | G.874.1 |
| use | | |
| Number of Single-channel Application | G | N.A. |
| Identifiers Supported | | |
| Current Output Power | G,S | RFC3591 |
| Current Input Power | G | RFC3591 |
+---------------------------------------------+---------+-----------+
Table 1: Rs-Ss Configuration
4.2.2. Table of Application Identifiers
This table has a list of Application Identifiers supported by this
interface at point R are defined in G.698.2.
Application Identifier Number:
The number that uniquely identifies the Application Identifier.
Application Identifier Type:
Type of application Identifier: STANDARD / PROPRIETARY in G.874.1
Note: if the A.I. type = PROPRIETARY, the first 6 Octets of the
Application Identifier (PrintableString) must contain the
Hexadecimal representation of an OUI (organizationally unique
identifier) assigned to the vendor whose implementation generated
the Application Identifier; the remaining octets of the
PrintableString are unspecified.
Application Identifier:
This is the application Identifier that is defined in G.874.1.
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4.3. Use of ifTable
This section specifies how the MIB II interfaces group, as defined in
RFC 2863 [RFC2863], is used for the link ends of a black link. Only
the ifGeneralInformationGroup will be supported for the ifTable and
the ifStackTable to maintain the relationship between the OCh and OPS
layers. The OCh and OPS layers are managed in the ifTable using
IfEntries that correlate to the layers depicted in Figure 1.
For example, a device with TX and/or RX will have an Optical Physical
Section (OPS) layer, and an OCh layer. There is a one to n
relationship between the OPS and OCh layers.
EDITOR NOTE: Reason for changing from OChr to OCh: Edition 3 of G.872
removed OChr from the architecture and G.709 was subsequently updated
to account for this architectural change.
Figure 5 In the following figures, opticalPhysicalSection are
abbreviated as OPS.
_____________________
\
Path Data Unit |\
(ODUk) | \
_____________________| \ __________________
| | | >
Tandem Data Unit | | | |
(ODUkT) | | OCh Layer | > n och IfEntries
_____________________| | | |
| |__________________| >
Optical | /| | >
Transport Unit | / | | |
(OTUk) |/ | OPSn Layer | > m ops IfEntries
_____________________/ | | |
|__________________| >
Figure 5: OTN Layers for OPS and OCh
Each opticalChannel IfEntry is mapped to one of the m
opticalPhysicalSection IfEntries, where m is greater than or equal to
1. Conversely, each opticalTransPhysicalSection port entry is mapped
to one of the n opticalChannel IfEntries, where n is greater than or
equal to 1.
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The design of the Optical Interface MIB provides the option to model
an interface either as a single bidirectional object containing both
sink and source functions or as a pair of unidirectional objects, one
containing sink functions and the other containing source functions.
If the sink and source for a given protocol layer are to be modelled
as separate objects, then there need to be two ifTable entries, one
that corresponds to the sink and one that corresponds to the source,
where the directionality information is provided in the configuration
tables for that layer via the associated Directionality objects. The
agent is expected to maintain consistent directionality values
between ifStackTable layers (e.g., a sink must not be stacked in a
1:1 manner on top of a source, or vice-versa), and all protocol
layers that are represented by a given ifTable entry are expected to
have the same directionality.
When separate ifTable entries are used for the source and sink
functions of a given physical interface, association between the two
uni-directional ifTable entries (one for the source function and the
other for the sink functions) should be provided. It is recommended
that identical ifName values are used for the two ifTable entries to
indicate such association. An implementation shall explicitly state
what mechanism is used to indicate the association, if ifName is not
used.
4.3.1. Use of ifTable for OPS Layer
Only the ifGeneralInformationGroup needs to be supported.
ifTable Object Use for OTN OPS Layer
==================================================================
ifIndex The interface index.
ifDescr Optical Transport Network (OTN) Optical
Physical Section (OPS)
ifType opticalPhysicalSection (xxx)
<<<Editor Note: Need new IANA registration value for xxx. >>>
ifSpeed Actual bandwidth of the interface in bits per
second. If the bandwidth of the interface is
greater than the maximum value of 4,294,967,295
then the maximum value is reported and
ifHighSpeed must be used to report the
interface's speed.
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ifPhysAddress An octet string with zero length. (There is
no specific address associated with the
interface.)
ifAdminStatus The desired administrative state of the
interface. Supports read-only access.
ifOperStatus The operational state of the interface. The
value lowerLayerDown(7) is not used, since
there is no lower layer interface. This object
is set to notPresent(6) if a component is
missing, otherwise it is set to down(2) if
either of the objects optIfOPSnCurrentStatus
indicates that any defect is present.
ifLastChange The value of sysUpTime at the last change in
ifOperStatus.
ifName Enterprise-specific convention (e.g., TL-1 AID)
to identify the physical or data entity
associated with this interface or an
OCTET STRING of zero length. The
enterprise-specific convention is intended to
provide the means to reference one or more
enterprise-specific tables.
ifLinkUpDownTrapEnable Default value is enabled(1). Supports
read-only access.
ifHighSpeed Actual bandwidth of the interface in Mega-bits
per second. A value of n represents a range of
'n-0.5' to 'n+0.499999'.
ifConnectorPresent Set to true(1).
ifAlias The (non-volatile) alias name for this interface
as assigned by the network manager.
4.3.2. Use of ifTable for OCh Layer
Use of ifTable for OCh Layer See RFC 3591 [RFC3591] section 2.4
4.3.3. Use of ifStackTable
Use of the ifStackTable and ifInvStackTable to associate the
opticalPhysicalSection and opticalChannel interface entries is best
illustrated by the example shown in Figure 3. The example assumes an
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ops interface with ifIndex i that carries two multiplexed OCh
interfaces with ifIndex values of j and k, respectively. The example
shows that j and k are stacked above (i.e., multiplexed into) i.
Furthermore, it shows that there is no layer lower than i and no
layer higher than j and/or k.
Figure 6
HigherLayer LowerLayer
--------------------------
0 j
0 k
j i
k i
i 0
Figure 6: Use of ifStackTable for an OTN port
For the inverse stack table, it provides the same information as the
interface stack table, with the order of the Higher and Lower layer
interfaces reversed.
5. Structure of the MIB Module
EDITOR NOTE:text will be provided based on the MIB module in
Section 6
6. Object Definitions
EDITOR NOTE: Once the scope in Section 1 and the parameters in
Section 4 are finalized, a MIB module will be defined. It could be
an extension to the OPT-IF-MIB module of RFC 3591. >>>
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OPT-IF-698-MIB DEFINITIONS ::= BEGIN
IMPORTS
MODULE-IDENTITY,
OBJECT-TYPE,
Gauge32,
Integer32,
Unsigned32,
Counter64,
transmission,
NOTIFICATION-TYPE
FROM SNMPv2-SMI
TEXTUAL-CONVENTION,
RowPointer,
RowStatus,
TruthValue,
DisplayString,
DateAndTime
FROM SNMPv2-TC
SnmpAdminString
FROM SNMP-FRAMEWORK-MIB
MODULE-COMPLIANCE, OBJECT-GROUP
FROM SNMPv2-CONF
ifIndex
FROM IF-MIB
optIfMibModule
FROM OPT-IF-MIB;
-- This is the MIB module for the optical parameters -
-- Application codes associated with the black link end points.
optIfXcvrMibModule MODULE-IDENTITY
LAST-UPDATED "201401270000Z"
ORGANIZATION "IETF Ops/Camp MIB Working Group"
CONTACT-INFO
"WG charter:
http://www.ietf.org/html.charters/
Mailing Lists:
Editor: Gabriele Galimberti
Email: ggalimbe@cisco.com"
DESCRIPTION
"The MIB module to describe Black Link tranceiver
characteristics to rfc3591.
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Copyright (C) The Internet Society (2014). This version
of this MIB module is an extension to rfc3591; see the RFC
itself for full legal notices."
REVISION "201305050000Z"
DESCRIPTION
"Draft version 1.0"
REVISION "201305050000Z"
DESCRIPTION
"Draft version 2.0"
REVISION "201302270000Z"
DESCRIPTION
"Draft version 3.0"
REVISION "201307020000Z"
DESCRIPTION
"Draft version 4.0
Changed the draft to include only the G.698 parameters."
REVISION "201311020000Z"
DESCRIPTION
"Draft version 5.0
Mib has a table of application code/vendor
transcievercode G.698"
REVISION "201401270000Z"
DESCRIPTION
"Draft version 6.0"
REVISION "201407220000Z"
DESCRIPTION
"Draft version 8.0
Removed Vendor transceiver code"
REVISION "201502220000Z"
DESCRIPTION
"Draft version 11.0
Added reference to OUI in the first 6 Octets of a
proprietary Application code
Added a Length field for the Application code
Changed some names"
REVISION "201507060000Z"
DESCRIPTION
"Draft version 12.0
Added Power Measurement Use Cases
and ITU description" "
::= { optIfMibModule 4 }
::= { optIfMibModule 4 }
-- Addition to the RFC 3591 objects
optIfOChSsRsGroup OBJECT IDENTIFIER ::= { optIfXcvrMibModule 1 }
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-- OCh Ss/Rs config table
-- The application code/vendor tranceiver class for the Black Link
-- Ss-Rs will be added to the OchConfigTable
optIfOChSsRsConfigTable OBJECT-TYPE
SYNTAX SEQUENCE OF OptIfOChSsRsConfigEntry
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"A table of Och General config extension parameters"
::= { optIfOChSsRsGroup 1 }
optIfOChSsRsConfigEntry OBJECT-TYPE
SYNTAX OptIfOChSsRsConfigEntry
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"A conceptual row that contains G.698 parameters for an
interface."
INDEX { ifIndex }
::= { optIfOChSsRsConfigTable 1 }
OptIfOChSsRsConfigEntry ::=
SEQUENCE {
optIfOChCentralFrequency Unsigned32,
optIfOChCfgApplicationIdentifierNumber Unsigned32,
optIfOChCfgApplicationIdentifierType Unsigned32,
optIfOChCfgApplicationIdentifierLength Unsigned32,
optIfOChCfgApplicationIdentifier DisplayString,
optIfOChNumberApplicationCodesSupported Unsigned32
}
optIfOChCentralFrequency OBJECT-TYPE
SYNTAX Unsigned32
MAX-ACCESS read-write
UNITS "THz"
STATUS current
DESCRIPTION
" This parameter indicates the frequency of this interface.
"
::= { optIfOChSsRsConfigEntry 1 }
optIfOChCfgApplicationIdentifierNumber OBJECT-TYPE
SYNTAX Unsigned32
MAX-ACCESS read-write
STATUS current
DESCRIPTION
"This parameter uniquely indicates the transceiver
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application code at Ss and Rs as defined in [ITU.G874.1],
that is used by this interface.
The optIfOChSrcApplicationIdentifierTable has all the
application codes supported by this interface. "
::= { optIfOChSsRsConfigEntry 2 }
optIfOChCfgApplicationIdentifierType OBJECT-TYPE
SYNTAX Unsigned32
MAX-ACCESS read-write
STATUS current
DESCRIPTION
"This parameter indicates the transceiver type of
application code at Ss and Rs as defined in [ITU.G874.1],
that is used by this interface.
The optIfOChSrcApplicationIdentifierTable has all the
application codes supported by this interface
Standard = 0, PROPRIETARY = 1. "
::= { optIfOChSsRsConfigEntry 3 }
optIfOChCfgApplicationIdentifierLenght OBJECT-TYPE
SYNTAX Unsigned32
MAX-ACCESS read-write
STATUS current
DESCRIPTION
"This parameter indicates the number of octets in the
Application Identifier.
"
::= { optIfOChSsRsConfigEntry 4 }
optIfOChCfgApplicationIdentifier OBJECT-TYPE
SYNTAX DisplayString
MAX-ACCESS read-write
STATUS current
DESCRIPTION
"This parameter indicates the transceiver application code
at Ss and Rs as defined in [ITU.G698.2] Chapter 5.3, that
is used by this interface. The
optIfOChSrcApplicationCodeTable has all the application
codes supported by this interface.
If the optIfOChCfgApplicationIdentifierType is 1
(Proprietary), then the first 6 octets of the printable
string will be the OUI (organizationally unique identifier)
assigned to the vendor whose implementation generated the
Application Identifier."
::= { optIfOChSsRsConfigEntry 5 }
optIfOChNumberApplicationIdentifiersSupported OBJECT-TYPE
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SYNTAX Unsigned32
MAX-ACCESS read-only
STATUS current
DESCRIPTION
" Number of Application codes supported by this interface."
::= { optIfOChSsRsConfigEntry 6 }
-- Table of Application codes supported by the interface
-- OptIfOChSrcApplicationCodeEntry
optIfOChSrcApplicationIdentifierTable OBJECT-TYPE
SYNTAX SEQUENCE OF OptIfOChSrcApplicationIdentifierEntry
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"A Table of Application codes supported by this interface."
::= { optIfOChSsRsGroup 2 }
optIfOChSrcApplicationIdentifierEntry OBJECT-TYPE
SYNTAX OptIfOChSrcApplicationIdentifierEntry
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"A conceptual row that contains the Application code for
this interface."
INDEX { ifIndex, optIfOChApplicationIdentiferNumber }
::= { optIfOChSrcApplicationIdentifierTable 1 }
OptIfOChSrcApplicationIdentifierEntry ::=
SEQUENCE {
optIfOChApplicationIdentiferNumber Integer32,
optIfOChApplicationIdentiferType Integer32,
optIfOChApplicationIdentiferLength Integer32,
optIfOChApplicationIdentifier DisplayString
}
optIfOChApplicationIdentiferNumber OBJECT-TYPE
SYNTAX Integer32 (1..255)
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
" The number/identifier of the application code supported at
this interface. The interface can support more than one
application codes.
"
::= { optIfOChSrcApplicationIdentifierEntry 1}
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optIfOChApplicationIdentiferType OBJECT-TYPE
SYNTAX Integer32 (1..255)
MAX-ACCESS read-only
STATUS current
DESCRIPTION
" The type of identifier of the application code supported at
this interface. The interface can support more than one
application codes.
Standard = 0, PROPRIETARY = 1
"
::= { optIfOChSrcApplicationIdentifierEntry 2}
optIfOChApplicationIdentiferLength OBJECT-TYPE
SYNTAX Integer32 (1..255)
MAX-ACCESS read-only
STATUS current
DESCRIPTION
" This parameter indicates the number of octets in the
Application Identifier.
"
::= { optIfOChSrcApplicationIdentifierEntry 3}
optIfOChApplicationIdentifier OBJECT-TYPE
SYNTAX DisplayString
MAX-ACCESS read-only
STATUS current
DESCRIPTION
" The application code supported by this interface DWDM
link.
If the optIfOChApplicationIdentiferType is 1 (Proprietary),
then the first 6 octets of the printable string will be
the OUI (organizationally unique identifier) assigned to
the vendor whose implementation generated the Application
Identifier."
::= { optIfOChSrcApplicationIdentifierEntry 4}
-- Notifications
-- Central Frequency Change Notification
optIfOChCentralFrequencyChange NOTIFICATION-TYPE
OBJECTS { optIfOChCentralFrequency }
STATUS current
DESCRIPTION
"Notification of a change in the central frequency."
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::= { optIfXcvrMibModule 1 }
END
7. Relationship to Other MIB Modules
7.1. Relationship to the [TEMPLATE TODO] MIB
7.2. MIB modules required for IMPORTS
8. Definitions
[TEMPLATE TODO]: put your valid MIB module here.
A list of tools that can help automate the process of
checking MIB definitions can be found at
http://www.ops.ietf.org/mib-review-tools.html
9. Security Considerations
There are a number of management objects defined in this MIB module
with a MAX-ACCESS clause of read-write and/or read-create. Such
objects may be considered sensitive or vulnerable in some network
environments. The support for SET operations in a non-secure
environment without proper protection can have a negative effect on
network operations. These are the tables and objects and their
sensitivity/vulnerability:
o
Some of the readable objects in this MIB module (i.e., objects with a
MAX-ACCESS other than not-accessible) may be considered sensitive or
vulnerable in some network environments. It is thus important to
control even GET and/or NOTIFY access to these objects and possibly
to even encrypt the values of these objects when sending them over
the network via SNMP.
SNMP versions prior to SNMPv3 did not include adequate security.
Even if the network itself is secure (for example by using IPsec),
even then, there is no control as to who on the secure network is
allowed to access and GET/SET (read/change/create/delete) the objects
in this MIB module.
It is RECOMMENDED that implementers consider the security features as
provided by the SNMPv3 framework (see [RFC3410], section 8),
including full support for the SNMPv3 cryptographic mechanisms (for
authentication and privacy).
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Further, deployment of SNMP versions prior to SNMPv3 is NOT
RECOMMENDED. Instead, it is RECOMMENDED to deploy SNMPv3 and to
enable cryptographic security. It is then a customer/operator
responsibility to ensure that the SNMP entity giving access to an
instance of this MIB module is properly configured to give access to
the objects only to those principals (users) that have legitimate
rights to indeed GET or SET (change/create/delete) them.
10. IANA Considerations
Option #1:
The MIB module in this document uses the following IANA-assigned
OBJECT IDENTIFIER values recorded in the SMI Numbers registry:
Descriptor OBJECT IDENTIFIER value
---------- -----------------------
sampleMIB { mib-2 XXX }
Option #2:
Editor's Note (to be removed prior to publication): the IANA is
requested to assign a value for "XXX" under the 'mib-2' subtree and
to record the assignment in the SMI Numbers registry. When the
assignment has been made, the RFC Editor is asked to replace "XXX"
(here and in the MIB module) with the assigned value and to remove
this note.
Note well: prior to official assignment by the IANA, an internet
draft MUST use place holders (such as "XXX" above) rather than actual
numbers. See RFC4181 Section 4.5 for an example of how this is done
in an internet draft MIB module.
Option #3:
This memo includes no request to IANA.
11. Contributors
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Arnold Mattheus
Deutsche Telekom
Darmstadt
Germany
email a.mattheus@telekom.de
Manuel Paul
Deutsche Telekom
Berlin
Germany
email Manuel.Paul@telekom.de
Frank Luennemann
Deutsche Telekom
Munster
Germany
email Frank.Luennemann@telekom.de
Scott Mansfield
Ericsson Inc.
email scott.mansfield@ericsson.com
Najam Saquib
Cisco
Ludwig-Erhard-Strasse 3
ESCHBORN, HESSEN 65760
GERMANY
email nasaquib@cisco.com
Walid Wakim
Cisco
9501 Technology Blvd
ROSEMONT, ILLINOIS 60018
UNITED STATES
email wwakim@cisco.com
Ori Gerstel
Sedona System
ISRAEL
email orig@sedonasys.com
12. References
12.1. Normative References
[RFC2863] McCloghrie, K. and F. Kastenholz, "The Interfaces Group
MIB", RFC 2863, June 2000.
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[RFC2119] Bradner, S., "Key words for use in RFCs to Indicate
Requirement Levels", BCP 14, RFC 2119, March 1997.
[RFC2578] McCloghrie, K., Ed., Perkins, D., Ed., and J.
Schoenwaelder, Ed., "Structure of Management Information
Version 2 (SMIv2)", STD 58, RFC 2578, April 1999.
[RFC2579] McCloghrie, K., Ed., Perkins, D., Ed., and J.
Schoenwaelder, Ed., "Textual Conventions for SMIv2", STD
58, RFC 2579, April 1999.
[RFC2580] McCloghrie, K., Perkins, D., and J. Schoenwaelder,
"Conformance Statements for SMIv2", STD 58, RFC 2580,
April 1999.
[RFC3591] Lam, H-K., Stewart, M., and A. Huynh, "Definitions of
Managed Objects for the Optical Interface Type", RFC 3591,
September 2003.
[RFC6205] Otani, T. and D. Li, "Generalized Labels for Lambda-
Switch-Capable (LSC) Label Switching Routers", RFC 6205,
March 2011.
[ITU.G698.2]
International Telecommunications Union, "Amplified
multichannel dense wavelength division multiplexing
applications with single channel optical interfaces",
ITU-T Recommendation G.698.2, November 2009.
[ITU.G709]
International Telecommunications Union, "Interface for the
Optical Transport Network (OTN)", ITU-T Recommendation
G.709, February 2012.
[ITU.G872]
International Telecommunications Union, "Architecture of
optical transport networks", ITU-T Recommendation G.872
and Amd.1, October 2012.
[ITU.G798]
International Telecommunications Union, "Characteristics
of optical transport network hierarchy equipment
functional blocks", ITU-T Recommendation G.798 and Amd.1,
December 2012.
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[ITU.G874]
International Telecommunications Union, "Management
aspects of optical transport network elements", ITU-T
Recommendation G.874, August 2013.
[ITU.G874.1]
International Telecommunications Union, "Optical transport
network (OTN): Protocol-neutral management information
model for the network element view", ITU-T Recommendation
G.874.1, October 2012.
[ITU.G959.1]
International Telecommunications Union, "Optical transport
network physical layer interfaces", ITU-T Recommendation
G.959.1, November 2009.
[ITU.G826]
International Telecommunications Union, "End-to-end error
performance parameters and objectives for international,
constant bit-rate digital paths and connections", ITU-T
Recommendation G.826, November 2009.
[ITU.G8201]
International Telecommunications Union, "Error performance
parameters and objectives for multi-operator international
paths within the Optical Transport Network (OTN)", ITU-T
Recommendation G.8201, April 2011.
[ITU.G694.1]
International Telecommunications Union, "Spectral grids
for WDM applications: DWDM frequency grid", ITU-T
Recommendation G.694.1, February 2012.
[ITU.G7710]
International Telecommunications Union, "Common equipment
management function requirements", ITU-T Recommendation
G.7710, February 2012.
12.2. Informative References
[RFC3410] Case, J., Mundy, R., Partain, D., and B. Stewart,
"Introduction and Applicability Statements for Internet-
Standard Management Framework", RFC 3410, December 2002.
[RFC2629] Rose, M., "Writing I-Ds and RFCs using XML", RFC 2629,
June 1999.
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[RFC4181] Heard, C., "Guidelines for Authors and Reviewers of MIB
Documents", BCP 111, RFC 4181, September 2005.
[I-D.kunze-g-698-2-management-control-framework]
Kunze, R., "A framework for Management and Control of
optical interfaces supporting G.698.2", draft-kunze-
g-698-2-management-control-framework-00 (work in
progress), July 2011.
[RFC4054] Strand, J. and A. Chiu, "Impairments and Other Constraints
on Optical Layer Routing", RFC 4054, May 2005.
Appendix A. Change Log
This optional section should be removed before the internet draft is
submitted to the IESG for publication as an RFC.
Note to RFC Editor: please remove this appendix before publication as
an RFC.
Appendix B. Open Issues
Note to RFC Editor: please remove this appendix before publication as
an RFC.
Authors' Addresses
Gabriele Galimberti (editor)
Cisco
Via Santa Maria Molgora, 48 c
20871 - Vimercate
Italy
Phone: +390392091462
Email: ggalimbe@cisco.com
Ruediger Kunze (editor)
Deutsche Telekom
Dddd, xx
Berlin
Germany
Phone: +49xxxxxxxxxx
Email: RKunze@telekom.de
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Hing-Kam Lam (editor)
Alcatel-Lucent
600-700 Mountain Avenue, Murray Hill
New Jersey, 07974
USA
Phone: +17323313476
Email: kam.lam@alcatel-lucent.com
Dharini Hiremagalur (editor)
Juniper
1194 N Mathilda Avenue
Sunnyvale - 94089 California
USA
Phone: +1408
Email: dharinih@juniper.net
Luyuan Fang (editor)
Microsoft
5600 148th Ave NE
Redmond, WA 98502
USA
Email: lufang@microsoft.com
Gary Ratterree (editor)
Microsoft
5600 148th Ave NE
Redmond, WA 98502
USA
Email: gratt@microsoft.com
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