Pseudowire Edge-to-Edge Emulation T. Nadeau, Ed.
Internet-Draft BT
Intended status: Standards Track D. Zelig, Ed.
Expires: August 15, 2009 Oversi
O. Nicklass, Ed.
RADVISION
February 15, 2009
Definitions of Textual Conventions for Pseudowires (PW) Management
draft-ietf-pwe3-pw-tc-mib-15
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Abstract
This memo defines a Management Information Base (MIB) module which
contains Textual Conventions (TCs) to represent commonly-used
Pseudowire (PW) management information. The intent is that these TCs
will be imported and used in PW-related MIB modules that would
otherwise define their own representations.
Conventions used in this document
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 [RFC2119].
Table of Contents
1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . . 3
2. The Internet-Standard Management Framework . . . . . . . . . . 3
3. Object Definitions . . . . . . . . . . . . . . . . . . . . . . 3
4. Security Considerations . . . . . . . . . . . . . . . . . . . 9
5. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 9
6. References . . . . . . . . . . . . . . . . . . . . . . . . . . 10
6.1. Normative References . . . . . . . . . . . . . . . . . . . 10
6.2. Informative References . . . . . . . . . . . . . . . . . . 10
Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . . 11
Intellectual Property and Copyright Statements . . . . . . . . . . 12
1. Introduction
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This memo defines a portion of the Management Information Base (MIB)
for use with network management protocols in the Internet community.
In particular, it defines Textual Conventions used for Pseudowire
(PW) technology and PWE3 MIB modules.
Comments should be made directly to the PWE3 mailing list at
pwe3@ietf.org.
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 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].
3. Object Definitions
PW-TC-STD-MIB DEFINITIONS ::= BEGIN
IMPORTS
MODULE-IDENTITY, Unsigned32, mib-2
FROM SNMPv2-SMI -- [RFC2578]
TEXTUAL-CONVENTION
FROM SNMPv2-TC; -- [RFC2579]
pwTcStdMIB MODULE-IDENTITY
LAST-UPDATED "200902151200Z" -- 15 February 2009 12:00:00 GMT
ORGANIZATION "Pseudowire Edge-to-Edge Emulation (PWE3) Working
Group"
CONTACT-INFO
" Thomas D. Nadeau
Email: tom.nadeau@bt.com
David Zelig
Email: davidz@oversi.com
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Orly Nicklass
Email: orlyn@radvision.com
The PWE3 Working Group (email distribution pwe3@ietf.org,
http://www.ietf.org/html.charters/pwe3-charter.html)
"
DESCRIPTION
"This MIB module defines TEXTUAL CONVENTIONS
for concepts used in Pseudowire Edge-to-Edge
networks.
Copyright (C) The IETF Trust (2009). The
initial version of this MIB module as published
in RFC YYYY. For full legal notices see the RFC
itself or see:
http://www.ietf.org/copyrights/ianamib.html
-- RFC Editor: Please replace YYYY with the RFC number and remove
-- this note.
"
-- Revision history.
REVISION "200902151200Z" -- 15 february 2009 12:00:00 GMT
DESCRIPTION
"Original Version"
::= { mib-2 XXXX }
-- RFC Editor: please replace XXXX with IANA assigned value and
-- delete this note.
PwGroupID ::= TEXTUAL-CONVENTION
DISPLAY-HINT "d"
STATUS current
DESCRIPTION
"An administrative identification for grouping a
set of service-specific pseudowire services."
SYNTAX Unsigned32
PwIDType ::= TEXTUAL-CONVENTION
DISPLAY-HINT "d"
STATUS current
DESCRIPTION
"Pseudowire Identifier. Used to identify the PW
(together with some other fields) in the signaling
session."
SYNTAX Unsigned32
PwIndexType ::= TEXTUAL-CONVENTION
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DISPLAY-HINT "d"
STATUS current
DESCRIPTION
"Pseudowire Index. A unique value, greater than zero,
for each locally-defined PW for indexing
several MIB tables associated with the particular PW.
It is recommended that values are assigned contiguously
starting from 1. The value for each PW MUST remain
constant at least from one re-initialization
to the next re-initialization."
SYNTAX Unsigned32 (1..4294967295)
PwIndexOrZeroType ::= TEXTUAL-CONVENTION
DISPLAY-HINT "d"
STATUS current
DESCRIPTION
"This textual convention is an extension of the
PwIndexType convention. The latter defines a greater-
than-zero value used to identify a Pseudowire
in the managed system. This extension permits the
additional value of zero. The zero value is object-specific
and MUST therefore be defined as part of the description of
any object which uses this syntax. Examples of the usage of
zero might include situations where Pseudowire was unknown,
or when none or all Pseudowires need to be referenced."
SYNTAX Unsigned32 (0..4294967295)
PwOperStatusTC ::= TEXTUAL-CONVENTION
STATUS current
DESCRIPTION
"Indicates the operational status of the PW.
- up(1): Ready to pass packets.
- down(2): If PW signaling is not yet finished, or
indications available at the service
level indicate that the PW is not
passing packets.
- testing(3): If AdminStatus at the PW level is set to
test.
- dormant(4): The PW is not in a condition to pass
packets, but is in a 'pending' state,
waiting for some external event.
- notPresent(5): Some component is missing to accomplish
the setup of the PW. It can be configuration
error, incomplete configuration or missing
of H/W component.
- lowerLayerDown(6):One or more of the lower-layer interfaces
responsible for running the underlying PSN
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is not in OperStatus 'up' state."
SYNTAX INTEGER {
up(1),
down(2),
testing(3),
dormant(4),
notPresent(5),
lowerLayerDown(6)
}
PwAttachmentIdentifierType ::= TEXTUAL-CONVENTION
STATUS current
DESCRIPTION
"An octet string used in the generalized FEC element for
identifying attachment forwarder and groups. A NULL
identifier is of zero length.
"
SYNTAX OCTET STRING (SIZE (0..255))
PwGenIdType ::= TEXTUAL-CONVENTION
STATUS current
DESCRIPTION
"Represents the AGI Type and AII Type in generalized FEC
signaling and configuration.
"
SYNTAX Unsigned32( 0..254 )
PwCwStatusTC ::= TEXTUAL-CONVENTION
STATUS current
DESCRIPTION
"Indicates the status of the control word (CW) negotiation
based on the local configuration and the indications received
from the peer node.
waitingForNextMsg(1) indicates that the node is waiting for
another label mapping from the peer.
sentWrongBitErrorCode(2) indicates that the local node has
notified the peer about a mismatch in the C-bit.
rxWithdrawWithWrongBitErrorCode(3) indicates that a withdraw
message has been received with the wrong C-bit error code.
illegalReceivedBit(4) indicates a C-bit configuration with
the peer which is not compatible with the PW type.
cwPresent(5) indicates that the CW is present for this PW:
If signaling is used - the C-bit is set and agreed between the
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nodes, and for manually-configured PW the local configuration
requires the use of the CW.
cwNotPresent(6) indicates that the CW is not present for
this PW: If signaling is used - the C-bit is reset and agreed
between the nodes, and for manually-configured PW the local
configuration requires that the CW not be used.
notYetKnown(7) indicates that a label mapping has not yet
been received from the peer.
"
REFERENCE
"Martini, et al, 'Pseudowire Setup and Maintenance using
the Label Distribution Protocol', [RFC4447]."
SYNTAX INTEGER {
waitingForNextMsg (1),
sentWrongBitErrorCode (2),
rxWithdrawWithWrongBitErrorCode (3),
illegalReceivedBit (4),
cwPresent (5),
cwNotPresent (6),
notYetKnown(7)
}
PwStatus ::= TEXTUAL-CONVENTION
STATUS current
DESCRIPTION
"Indicates the status of the PW and the interfaces affecting
this PW. If none of the bits are set, it indicates no faults
are reported.
"
SYNTAX BITS {
pwNotForwarding (0),
servicePwRxFault (1),
servicePwTxFault (2),
psnPwRxFault (3),
psnPwTxFault (4)
}
PwFragSize ::= TEXTUAL-CONVENTION
DISPLAY-HINT "d"
STATUS current
DESCRIPTION
"If set to a value other than zero, it indicates the desired
fragmentation length in bytes. If set to zero,
fragmentation is not desired for PSN bound packets.
"
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SYNTAX Unsigned32
PwFragStatus ::= TEXTUAL-CONVENTION
STATUS current
DESCRIPTION
"Indicates the status of the fragmentation/reassembly process
based on local configuration and peer capability.
noFrag(0) bit indicates that local configuration is for no
fragmentation.
cfgFragGreaterThanPsnMtu(1) bit indicates the local node
is set to fragment, but the fragmentation size is greater
than the MTU available at the PSN between the nodes.
Fragmentation is not done in this case.
cfgFragButRemoteIncapable(2) bit indicates that the local
configuration indicates the desire for fragmentation but
the peer is not capable of reassembly.
remoteFragCapable(3) bit indicates that the remote node
is capable to accept fragmented PDUs.
fragEnabled(4) bit indicates that fragmentation will be used
on this PW. Fragmentation can be used if the local node was
configured for fragmentation, the peer has the capability
to accept fragmented packets, and the CW is in use for this
PW."
REFERENCE
"Malis, A. and M. Townsley, 'Pseudowire Emulation Edge-to-
Edge (PWE3) Fragmentation and Reassembly', [RFC4623]."
SYNTAX BITS {
noFrag (0),
cfgFragGreaterThanPsnMtu (1),
cfgFragButRemoteIncapable (2),
remoteFragCapable (3),
fragEnabled (4)
}
PwCfgIndexOrzero ::= TEXTUAL-CONVENTION
DISPLAY-HINT "d"
STATUS current
DESCRIPTION
"Index in any of the relevant configuration tables for
supplement information regarding configuration of the
specific technology. Value 0 implies no additional
configuration information is applicable."
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SYNTAX Unsigned32 (0..4294967295)
END
4. Security Considerations
This module does not define any management objects. Instead, it
defines a set of textual conventions that may be used by other PWE3
MIB modules to define management objects.
Meaningful security considerations can only be written in the MIB
modules that define management objects. Therefore, this document has
no impact on the security of the Internet.
5. IANA Considerations
The MIB module in this document uses the following IANA-assigned
OBJECT IDENTIFIER values recorded in the SMI Numbers registry:
Descriptor OBJECT IDENTIFIER value
---------- -----------------------
pwTcStdMIB { mib-2 XXXX }
Editor's Note (to be removed prior to publication): The IANA is
requested to assign a value for "XXXX" 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 "XXXX"
(here and in the MIB module) with the assigned value and to remove
this note.
6. References
6.1. Normative References
[RFC2119] Bradner, S., "Key words for use in RFCs to Indicate
requirement Levels", 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.
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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.
[RFC4447] Martini, L., Rosen, E., El-Aawar, N., Smith, T., and G.
Heron, "Pseudowire Setup and Maintenance Using the Label
Distribution Protocol (LDP)", RFC 4447, April 2006.
[RFC4623] Malis, A. and M. Townsley, "Pseudowire Emulation Edge-to-
Edge (PWE3) Fragmentation and Reassembly", RFC 4623,
August 2006.
6.2. 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.
Authors' Addresses
Thomas D. Nadeau (editor)
BT
BT Centre
81 Newgate Street
London EC1A 7AJ
United Kingdom
Email: tom.nadeau@bt.com
David Zelig (editor)
Oversi Networks
1 Rishon Letzion St.
Petah Tikva
Israel
Phone: +972 77 3337 750
Email: davidz@oversi.com
Orly Nicklass (editor)
RADVISION
24 Raul Wallenberg
Tel Aviv
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Phone: +972 3 776 9444
Email: orlyn@radvision.com
Acknowledgment
Funding for the RFC Editor function is provided by the IETF
Administrative Support Activity (IASA).
This document was produced by the PWE3 Working Group.
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