RFC 1304
Definitions of Managed Objects for the SIP Interface Type
RFC 1304: Definitions of Managed Objects for the SIP Interface Type 🦋
Okay bestie, this is RFC 1304, and it's giving network management 💅. The title is Definitions of Managed Objects for the SIP Interface Type. Two editors wrote it, T. Cox and K. Tesink, both from Bell Communications Research, and it's dated February 1992 📅. It's an IAB standards track protocol, so it's an official spec and not just a chill opinion. The title block doesn't say it obsoletes or updates any other RFC, so it's a standalone main character 👑.
Status of This Memo ✨
So this part is basically the legal-ish disclaimer 🙈. It's an IAB standards track protocol for the Internet community, and the authors want feedback and suggestions to make it better 💖. If you want the current standardization state, check the "IAB Official Protocol Standards" document, because that's where the real status lives. And the good news: distribution of this memo is unlimited 🌈.
Abstract 🎀
This memo defines a chunk of the Management Information Base (MIB) that network management protocols use in TCP/IP-based internets 🧚. Specifically, it defines objects for managing SIP (SMDS Interface Protocol) objects, so it's all about keeping your SIP stuff organized and visible 🔥.
Table of Contents 🍓
1. The Network Management Framework ............................ 2
2. Objects ..................................................... 2
2.1 Format of Definitions ...................................... 3
3. Overview .................................................... 3
4. Object Definitions .......................................... 4
4.1 The SIP Level 3 group ...................................... 4
4.2 The SIP Level 2 group ...................................... 8
4.3 The SIP PLCP group ......................................... 11
4.3.1 The SIP DS1 PLCP group ................................... 12
4.3.2 The SIP DS3 PLCP group ................................... 14
4.4 The SMDS Applications group ................................ 16
4.5 The SMDS Carrier Selection group ........................... 18
4.6 The SIP Error Log group .................................... 18
5. Acknowledgments ............................................. 23
6. References .................................................. 23
7. Security Considerations...................................... 25
8. Authors' Addresses........................................... 251. The Network Management Framework ✨
Okay so the Internet-standard Network Management Framework is made of three components 🧩.
First up is RFC 1155 [3]. It defines the SMI, which is the set of mechanisms for describing and naming objects so they can be managed. RFC 1212 [9] comes next with a more concise way to describe things, and it's totally consistent with the SMI 💅.
Then there's RFC 1156 [4], which defines MIB-I, the core set of managed objects for the Internet suite of protocols. RFC 1213 [6] defines MIB-II, which is basically MIB-I level up, built from implementation experience and new operational needs 🌸.
Last is RFC 1157 [5], which defines SNMP, the protocol for network access to managed objects 🦋.
The Framework also lets people define new objects for experimentation and evaluation, so it's giving room to play 🧪.
2. Objects 💜
Managed objects live in a virtual information store called the Management Information Base, or MIB 🗂️. Objects in the MIB are defined using a subset of Abstract Syntax Notation One (ASN.1), which is International Standard 8824 [7] and is defined in the SMI. Every object has a name, a syntax, and an encoding 🫶.
The name is an object identifier. It's an administratively assigned name that specifies an object type. The object type plus an object instance together uniquely identify one specific instantiation of the object, so it's the full identity 🔥. For human convenience, people often use a text string called the OBJECT DESCRIPTOR to refer to the object type too 💖.
The syntax of an object type defines the abstract data structure for that type, and it's written in ASN.1 🧠. The SMI, RFC 1155 [3], deliberately limits which ASN.1 constructs you can use, and that's on purpose to keep things simple 🙈.
The encoding of an object type is how that type gets represented using its syntax. Closely tied to that is how the object type is represented when it's sent over the network 🌐. The SMI says to use the basic encoding rules of ASN.1, which are International Standard 8825 [8], with extra requirements added by SNMP ✨.
2.1. Format of Definitions 🎀
Section 4 has the specification of every object type in this MIB module. The object types follow the conventions in the SMI, plus the extensions in RFC 1212 [9] ✨.
3. Overview 🧚
These objects get used when the media that makes up an interface is a SIP interface. Right now that applies to this value of the ifType variable in the Internet-standard MIB 💅:
sip (31)For these interfaces, the ifSpecific variable in MIB-II [6] has this OBJECT IDENTIFIER value 🌈:
sip OBJECT IDENTIFIER ::= { transmission 31 }The definitions here are based on the SIP specifications in Bellcore TR-TSV-000772 and TR-TSV-000773 [11,12] 🦋.
The SIP (SMDS Interface Protocol) stack is laid out like this in TR-TSV-000772 [11] 🍓:
___________________
| |
| SIP Level 3 [11] |
|___________________|
| |
| SIP Level 2 [11] |
|___________________|
| |
| PLCP [12] |
|___________________|
| |
| DS1 or DS3 [12] |
|___________________|The PLCP (Physical Layer Convergence Procedure) takes what the transmission system can do (DS1 or DS3 formats) and adapts it to the service SIP Level 2 expects 🔥. The managed objects for DS1 and DS3 Interface Types are in RFC 1232 [13] and RFC 1233 [14] respectively, and RFC 1239 [17] amends them. You can use those to manage SIP interfaces too 💖.
This document defines managed objects for the remaining protocol levels of the SIP Interface Type ✨. It does not specify objects for managing subscription or configuration of Subscriber-Network Interfaces (SNIs). Those live in Definitions of Managed Objects for SMDS Subscription [18]. Bellcore's requirements for these objects are in TA-TSV-001062 [16] 🫶.
4. Object Definitions 👑
Here's the actual MIB module, and yes, it's big 😭. It's written in ASN.1, so copy it exactly:
RFC1304-MIB DEFINITIONS ::= BEGIN
IMPORTS
Counter, TimeTicks, IpAddress
FROM RFC1155-SMI
transmission
FROM RFC1213-MIB
OBJECT-TYPE
FROM RFC-1212;
-- This MIB module uses the extended OBJECT-TYPE macro
-- as defined in RFC-1212.
-- This is the MIB module for the SIP objects.
sip OBJECT IDENTIFIER ::= { transmission 31 }
-- All representations of SMDS addresses in this MIB
-- module use, as a textual convention (i.e., this
-- convention does not affect their encoding), the
-- data type:
SMDSAddress ::= OCTET STRING (SIZE (8))
-- the 60-bit SMDS address, preceded by 4 bits with the
-- following values:
-- "1100" when representing an individual address
-- "1110" when representing a group address
-- The SIP Level 3 group
-- Implementation of the SIP Level 3 group is mandatory
-- for all systems implementing SIP Level 3.
sipL3Table OBJECT-TYPE
SYNTAX SEQUENCE OF SipL3Entry
ACCESS not-accessible
STATUS mandatory
DESCRIPTION
"This table contains SIP L3 parameters and
state variables, one entry per SIP port."
::= { sip 1 }
sipL3Entry OBJECT-TYPE
SYNTAX SipL3Entry
ACCESS not-accessible
STATUS mandatory
DESCRIPTION
"This list contains SIP L3 parameters and
state variables."
INDEX { sipL3Index }
::= { sipL3Table 1 }
SipL3Entry ::= SEQUENCE {
sipL3Index
INTEGER,
sipL3ReceivedIndividualDAs
Counter,
sipL3ReceivedGAs
Counter,
sipL3UnrecognizedIndividualDAs
Counter,
sipL3UnrecognizedGAs
Counter,
sipL3SentIndividualDAs
Counter,
sipL3SentGAs
Counter,
sipL3Errors
Counter,
sipL3InvalidSMDSAddressTypes
Counter,
sipL3VersionSupport
INTEGER
}
sipL3Index OBJECT-TYPE
SYNTAX INTEGER (1..65535)
ACCESS read-only
STATUS mandatory
DESCRIPTION
"The value of this object identifies the SIP
port interface for which this entry contains
management information. The value of this
object for a particular interface has the same
value as the ifIndex object, defined in RFC
1156 and RFC 1213, for the same interface."
::= { sipL3Entry 1 }
sipL3ReceivedIndividualDAs OBJECT-TYPE
SYNTAX Counter
ACCESS read-only
STATUS mandatory
DESCRIPTION
"The total number of individually addressed SIP
Level 3 PDUs received from the remote system
across the SNI. The total includes only
unerrored L3PDUs."
::= { sipL3Entry 2 }
sipL3ReceivedGAs OBJECT-TYPE
SYNTAX Counter
ACCESS read-only
STATUS mandatory
DESCRIPTION
"The total number of group addressed SIP Level 3
PDUs received from the remote system across the
SNI. The total includes only unerrored L3PDUs."
::= { sipL3Entry 3 }
sipL3UnrecognizedIndividualDAs OBJECT-TYPE
SYNTAX Counter
ACCESS read-only
STATUS mandatory
DESCRIPTION
"The number of SIP Level 3 PDUs received from the
remote system with invalid or unknown individual
destination addresses (Destination Address
Screening violations are not included). See SMDS
Subscription MIB module."
::= { sipL3Entry 4 }okay so we're picking up right where the L3 counters were getting spicy 💅
sipL3UnrecognizedGAs OBJECT-TYPE
SYNTAX Counter
ACCESS read-only
STATUS mandatory
DESCRIPTION
"The number of SIP Level 3 PDUs received from the
remote system with invalid or unknown group
addresses. (Destination Address Screening
violations are not included). See SMDS
Subscription MIB module."
::= { sipL3Entry 5 }
sipL3SentIndividualDAs OBJECT-TYPE
SYNTAX Counter
ACCESS read-only
STATUS mandatory
DESCRIPTION
"The number of individually addressed SIP Level 3
PDUs that have been sent by this system across the
SNI."
::= { sipL3Entry 6 }
sipL3SentGAs OBJECT-TYPE
SYNTAX Counter
ACCESS read-only
STATUS mandatory
DESCRIPTION
"The number of group addressed SIP L3PDUs that
have been sent by this system across the SNI."
::= { sipL3Entry 7 }
-- The total number of SIP L3PDU errors can be calculated as
-- (Syntactic errors + Semantic Service errors )
-- Syntactic errors include:
-- sipL3Errors
-- Latest occurrences of syntactic error types are logged in
-- sipL3PDUErrorTable.
-- Semantic Service errors include:
-- sipL3UnrecognizedIndividualDAs
-- sipL3UnrecognizedGAs
-- sipL3InvalidSMDSAddressTypes
-- Note that public networks supporting SMDS may discard
-- SIP L3PDUs due to subscription violations. Related
-- managed objects are defined in Definitions of Managed
-- Objects for SMDS Subscription.
sipL3Errors OBJECT-TYPE
SYNTAX Counter
ACCESS read-only
STATUS mandatory
DESCRIPTION
"The total number of SIP Level 3 PDUs received
from the remote system that were discovered to
have errors (including protocol processing and bit
errors but excluding addressing-related errors)
and were discarded. Includes both group addressed
L3PDUs and L3PDUs containing an individual
destination address."
::= { sipL3Entry 8 }
sipL3InvalidSMDSAddressTypes OBJECT-TYPE
SYNTAX Counter
ACCESS read-only
STATUS mandatory
DESCRIPTION
"The number of SIP Level 3 PDUs received from the
remote system that had the Source or Destination
Address_Type subfields, (the four most significant
bits of the 64 bit address field), not equal to
the value 1100 or 1110. Also, an error is
considered to have occurred if the Address_Type
field for a Source Address, the four most
significant bits of the 64 bits, is equal to 1110
(a group address)."
::= { sipL3Entry 9 }
sipL3VersionSupport OBJECT-TYPE
SYNTAX INTEGER (1..65535)
ACCESS read-only
STATUS mandatory
DESCRIPTION
"A value which indicates the version(s) of SIP
that this interface supports. The value is a sum.
This sum initially takes the value zero. For each
version, V, that this interface supports, 2 raised
to (V - 1) is added to the sum. For example, a
port supporting versions 1 and 2 would have a
value of (2^(1-1)+2^(2-1))=3. The
sipL3VersionSupport is effectively a bit mask with
Version 1 equal to the least significant bit
(LSB)."
::= { sipL3Entry 10 }
-- The SIP Level 2 group
-- Implementation of the SIP Level 2 group is mandatory
-- for all systems implementing SIP Level 2.
sipL2Table OBJECT-TYPE
SYNTAX SEQUENCE OF SipL2Entry
ACCESS not-accessible
STATUS mandatory
DESCRIPTION
"This table contains SIP L2PDU parameters and
state variables, one entry per SIP port."
::= { sip 2 }
sipL2Entry OBJECT-TYPE
SYNTAX SipL2Entry
ACCESS not-accessible
STATUS mandatory
DESCRIPTION
"This list contains SIP L2 parameters and state
variables."
INDEX { sipL2Index }
::= { sipL2Table 1 }
SipL2Entry ::= SEQUENCE {
sipL2Index
INTEGER,
sipL2ReceivedCounts
Counter,
sipL2SentCounts
Counter,
sipL2HcsOrCRCErrors
Counter,
sipL2PayloadLengthErrors
Counter,
sipL2SequenceNumberErrors
Counter,
sipL2MidCurrentlyActiveErrors
Counter,
sipL2BomOrSSMsMIDErrors
Counter,
sipL2EomsMIDErrors
Counter
}
sipL2Index OBJECT-TYPE
SYNTAX INTEGER (1..65535)
ACCESS read-only
STATUS mandatory
DESCRIPTION
"The value of this object identifies the SIP port
interface for which this entry contains management
information. The value of this object for a
particular interface has the same value as the
ifIndex object, defined in RFC 1156 and RFC 1213,
for the same interface."
::= { sipL2Entry 1 }
sipL2ReceivedCounts OBJECT-TYPE
SYNTAX Counter
ACCESS read-only
STATUS mandatory
DESCRIPTION
"The number of SIP Level 2 PDUs received from the
remote system across the SNI. The total includes
only unerrored L2PDUs."
::= { sipL2Entry 2 }
sipL2SentCounts OBJECT-TYPE
SYNTAX Counter
ACCESS read-only
STATUS mandatory
DESCRIPTION
"The number of SIP Level 2 PDUs that have been
sent by this system across the SNI."
::= { sipL2Entry 3 }
-- The total number of SIP L2PDU errors can be calculated as
-- the sum of:
-- sipL2HcsOrCRCErrors
-- sipL2PayloadLengthErrors
-- sipL2SequenceNumberErrors
-- sipL2MidCurrentlyActiveErrors
-- sipL2BomOrSSMsMIDErrors
-- sipL2EomsMIDErrors
sipL2HcsOrCRCErrors OBJECT-TYPE
SYNTAX Counter
ACCESS read-only
STATUS mandatory
DESCRIPTION
"The number of received SIP Level 2 PDUs that were
discovered to have either a Header Check Sequence
error or a Payload CRC violation."
::= { sipL2Entry 4 }
sipL2PayloadLengthErrors OBJECT-TYPE
SYNTAX Counter
ACCESS read-only
STATUS mandatory
DESCRIPTION
"The number of received SIP Level 2 PDUs that had
Payload Length errors that fall in the following
specifications:
- SSM L2_PDU payload length field value less
- than 28 octets or greater than 44 octets,
- BOM or COM L2_PDU payload length field not
- equal to 44 octets,
- EOM L2_PDU payload length field value less
- than 4 octets or greater than 44 octets."
::= { sipL2Entry 5 }
sipL2SequenceNumberErrors OBJECT-TYPE
SYNTAX Counter
ACCESS read-only
STATUS mandatory
DESCRIPTION
"The number of received SIP Level 2 PDUs that had
a sequence number within the L2PDU not equal to
the expected sequence number of the SMDS SS
receive process."
::= { sipL2Entry 6 }
sipL2MidCurrentlyActiveErrors OBJECT-TYPE
SYNTAX Counter
ACCESS read-only
STATUS mandatory
DESCRIPTION
"The number of received SIP Level 2 PDUs that are
BOMs for which an active receive process is
already started."
::= { sipL2Entry 7 }
sipL2BomOrSSMsMIDErrors OBJECT-TYPE
SYNTAX Counter
ACCESS read-only
STATUS mandatory
DESCRIPTION
"The number of received SIP Level 2 PDUs that are
SSMs with a MID not equal to zero or are BOMs with
MIDs equal to zero."
::= { sipL2Entry 8 }
sipL2EomsMIDErrors OBJECT-TYPE
SYNTAX Counter
ACCESS read-only
STATUS mandatory
DESCRIPTION
"The number of received SIP Level 2 PDUs that are
EOMs for which there is no active receive process
for the MID (i.e., the receipt of an EOM which
does not correspond to a BOM) OR the EOM has a MID
equal to zero."
::= { sipL2Entry 9 }
-- The SIP PLCP group
-- Implementation of one of these groups is mandatory
-- if the PLCP is implemented.
sipPLCP OBJECT IDENTIFIER ::= { sip 3 }
-- The SIP DS1 PLCP group
-- Implementation of this group is mandatory
-- if the DS1 PLCP is implemented.
sipDS1PLCPTable OBJECT-TYPE
SYNTAX SEQUENCE OF SipDS1PLCPEntry
ACCESS not-accessible
STATUS mandatory
DESCRIPTION
"This table contains SIP DS1 PLCP parameters and
state variables, one entry per SIP port."
::= { sipPLCP 1 }
sipDS1PLCPEntry OBJECT-TYPE
SYNTAX SipDS1PLCPEntry
ACCESS not-accessible
STATUS mandatory
DESCRIPTION
"This list contains SIP DS1 PLCP parameters and
state variables."
INDEX { sipDS1PLCPIndex }
::= { sipDS1PLCPTable 1 }
SipDS1PLCPEntry ::= SEQUENCE {
sipDS1PLCPIndex
INTEGER,
sipDS1PLCPSEFSs
Counter,
sipDS1PLCPAlarmState
INTEGER,
sipDS1PLCPUASs
Counter
} sipDS1PLCPIndex OBJECT-TYPE
SYNTAX INTEGER (1..65535)
ACCESS read-only
STATUS mandatory
DESCRIPTION
"The value of this object identifies the SIP port
interface for which this entry contains management
information. The value of this object for a
particular interface has the same value as the
ifIndex object, defined in RFC 1156 and RFC 1213,
for the same interface."
::= { sipDS1PLCPEntry 1 }
sipDS1PLCPSEFSs OBJECT-TYPE
SYNTAX Counter
ACCESS read-only
STATUS mandatory
DESCRIPTION
"A DS1 Severely Errored Framing Second (SEFS) is a
count of one-second intervals containing one or
more SEF events. A Severely Errored Framing (SEF)
event is declared when an error in the A1 octet
and an error in the A2 octet of a framing octet
pair (i.e., errors in both framing octets), or two
consecutive invalid and/or nonsequential Path
Overhead Identifier octets are detected."
::= { sipDS1PLCPEntry 2 }
sipDS1PLCPAlarmState OBJECT-TYPE
SYNTAX INTEGER {
noAlarm (1),
receivedFarEndAlarm (2),
incomingLOF (3)
}
ACCESS read-only
STATUS mandatory
DESCRIPTION
"This variable indicates if there is an alarm
present for the DS1 PLCP. The value
receivedFarEndAlarm means that the DS1 PLCP has
received an incoming Yellow Signal, the value
incomingLOF means that the DS1 PLCP has declared a
loss of frame (LOF) failure condition, and the
value noAlarm means that there are no alarms
present. See TR-TSV-000773 for a description of
alarm states."
::= { sipDS1PLCPEntry 3 }
sipDS1PLCPUASs OBJECT-TYPE
SYNTAX Counter
ACCESS read-only
STATUS mandatory
DESCRIPTION
"The counter associated with the number of
Unavailable Seconds, as defined by TR-TSV-000773,
encountered by the PLCP."
::= { sipDS1PLCPEntry 4 }okay the DS1 PLCP stuff is giving 🎀 now we're moving on to the DS3 side, bestie ✨
-- The SIP DS3 PLCP group
-- Implementation of this group is mandatory
-- if the DS3 PLCP is implemented.
sipDS3PLCPTable OBJECT-TYPE
SYNTAX SEQUENCE OF SipDS3PLCPEntry
ACCESS not-accessible
STATUS mandatory
DESCRIPTION
"This table contains SIP DS3 PLCP parameters and
state variables, one entry per SIP port."
::= { sipPLCP 2 }
sipDS3PLCPEntry OBJECT-TYPE
SYNTAX SipDS3PLCPEntry
ACCESS not-accessible
STATUS mandatory
DESCRIPTION
"This list contains SIP DS3 PLCP parameters and
state variables."
INDEX { sipDS3PLCPIndex }
::= { sipDS3PLCPTable 1 }
SipDS3PLCPEntry ::= SEQUENCE {
sipDS3PLCPIndex
INTEGER,
sipDS3PLCPSEFSs
Counter,
sipDS3PLCPAlarmState
INTEGER,
sipDS3PLCPUASs
Counter
}
sipDS3PLCPIndex OBJECT-TYPE
SYNTAX INTEGER (1..65535)
ACCESS read-only
STATUS mandatory
DESCRIPTION
"The value of this object identifies the SIP port
interface for which this entry contains management
information. The value of this object for a
particular interface has the same value as the
ifIndex object, defined in RFC 1156 and RFC 1213,
for the same interface."
::= { sipDS3PLCPEntry 1 }
sipDS3PLCPSEFSs OBJECT-TYPE
SYNTAX Counter
ACCESS read-only
STATUS mandatory
DESCRIPTION
"A DS3 Severely Errored Framing Second (SEFS) is a
count of one-second intervals containing one or
more SEF events. A Severely Errored Framing (SEF)
event is declared when an error in the A1 octet
and an error in the A2 octet of a framing octet
pair (i.e., errors in both framing octets), or two
consecutive invalid and/or nonsequential Path
Overhead Identifier octets are detected."
::= { sipDS3PLCPEntry 2 }
sipDS3PLCPAlarmState OBJECT-TYPE
SYNTAX INTEGER {
noAlarm (1),
receivedFarEndAlarm (2),
incomingLOF (3)
}
ACCESS read-only
STATUS mandatory
DESCRIPTION
"This variable indicates if there is an alarm
present for the DS3 PLCP. The value
receivedFarEndAlarm means that the DS3 PLCP has
received an incoming Yellow Signal, the value
incomingLOF means that the DS3 PLCP has declared a
loss of frame (LOF) failure condition, and the
value noAlarm means that there are no alarms
present. See TR-TSV-000773 for a description of
alarm states."
::= { sipDS3PLCPEntry 3 }
sipDS3PLCPUASs OBJECT-TYPE
SYNTAX Counter
ACCESS read-only
STATUS mandatory
DESCRIPTION
"The counter associated with the number of
Unavailable Seconds, as defined by TR-TSV-000773,
encountered by the PLCP."
::= { sipDS3PLCPEntry 4 }next up is the SMDS stuff, and honestly it's giving main character energy 💅🌈
-- The SMDS Applications group
-- Applications that have been identified for this group are:
-- * IP-over-SMDS (details are specified in RFC 1209)
-- Implementation of this group is mandatory for systems
-- that implement IP-over-SMDS Interface Protocol.
smdsApplications OBJECT IDENTIFIER ::= { sip 4 }
ipOverSMDS OBJECT IDENTIFIER ::= { smdsApplications 1 }
-- Although the objects in this group are read-only, at the
-- agent's discretion they may be made read-write so that the
-- management station, when appropriately authorized, may
-- change the addressing information related to the
-- configuration of a logical IP subnetwork implemented on
-- top of SMDS.
-- This table is necessary to support RFC1209 (IP-over-SMDS)
-- and gives information on the Group Addresses and ARP
-- Addresses used in the Logical IP subnetwork.
-- One SMDS address may be associated with multiple IP
-- addresses. One SNI may be associated with multiple LISs.
ipOverSMDSTable OBJECT-TYPE
SYNTAX SEQUENCE OF IpOverSMDSEntry
ACCESS not-accessible
STATUS mandatory
DESCRIPTION
"The table of addressing information relevant to
this entity's IP addresses."
::= { ipOverSMDS 1 }
ipOverSMDSEntry OBJECT-TYPE
SYNTAX IpOverSMDSEntry
ACCESS not-accessible
STATUS mandatory
DESCRIPTION
"The addressing information for one of this
entity's IP addresses."
INDEX { ipOverSMDSIndex, ipOverSMDSAddress }
::= { ipOverSMDSTable 1 }
IpOverSMDSEntry ::=
SEQUENCE {
ipOverSMDSIndex
INTEGER,
ipOverSMDSAddress
IpAddress,
ipOverSMDSHA
SMDSAddress,
ipOverSMDSLISGA
SMDSAddress,
ipOverSMDSARPReq
SMDSAddress
}
ipOverSMDSIndex OBJECT-TYPE
SYNTAX INTEGER (1..65535)
ACCESS read-only
STATUS mandatory
DESCRIPTION
"The value of this object identifies the SIP port
interface for which this entry contains management
information. The value of this object for a
particular interface has the same value as the
ifIndex object, defined in RFC 1156 and RFC 1213,
for the same interface."
::= { ipOverSMDSEntry 1 }
ipOverSMDSAddress OBJECT-TYPE
SYNTAX IpAddress
ACCESS read-only
STATUS mandatory
DESCRIPTION
"The IP address to which this entry's addressing
information pertains."
::= { ipOverSMDSEntry 2 }
ipOverSMDSHA OBJECT-TYPE
SYNTAX SMDSAddress
ACCESS read-only
STATUS mandatory
DESCRIPTION
"The SMDS Individual address of the IP station."
::= { ipOverSMDSEntry 3 }
ipOverSMDSLISGA OBJECT-TYPE
SYNTAX SMDSAddress
ACCESS read-only
STATUS mandatory
DESCRIPTION
"The SMDS Group Address that has been configured
to identify the SMDS Subscriber-Network Interfaces
(SNIs) of all members of the Logical IP Subnetwork
(LIS) connected to the network supporting SMDS."
::= { ipOverSMDSEntry 4 }
ipOverSMDSARPReq OBJECT-TYPE
SYNTAX SMDSAddress
ACCESS read-only
STATUS mandatory
DESCRIPTION
"The SMDS address (individual or group) to which
ARP Requests are to be sent."
::= { ipOverSMDSEntry 5 }
-- The SMDS Carrier Selection group
-- This group is used as a place holder
-- for carrier selection objects.
smdsCarrierSelection OBJECT IDENTIFIER ::= { sip 5}
-- The SIP Error Log
-- Implementation of this group is mandatory
-- for all systems that implement SIP Level 3.
sipErrorLog OBJECT IDENTIFIER ::= { sip 6 }
sipL3PDUErrorTable OBJECT-TYPE
SYNTAX SEQUENCE OF SipL3PDUErrorEntry
ACCESS not-accessible
STATUS mandatory
DESCRIPTION
"A table that contains the latest occurrence of
the following syntactical SIP L3PDU errors:
- Destination Address Field Format Error,okay so this bit is all about the 60 least significant bits of the 64 bit address field 💅✨ the 60 bits in the address subfield can hold addresses up to 15 decimal digits 🫶 each decimal digit shall be encoded into four bits using Binary Coded Decimal (BCD), with the most significant digit left-most 🔢 if you don't need all 15 digits, the rest of the field gets padded on the right with bits set to one 🌈
an error is considered to have occurred:
- a) if the first four bits of the address subfield are not BCD, or
- b) if the first four bits are populated with the country code value 0001, AND the 40 bits which follow are not BCD encoded values of the 10 digit addresses, OR the remaining 16 least significant bits are not populated with 1's, or
- c) if the address subfield is not correct according to another numbering plan which is dependent upon the carrier assigning the numbers and offering SMDS 🦋
- Source Address Field Format Error 🌸
the description of this one is the same as the Destination Address Field Format Error, so no need to repeat it bestie 💜
- Invalid BAsize Field Value 🎀
an error is considered to have occurred when the BAsize field of an SIP L3PDU contains a value less than 32, greater than 9220 octets without the CRC32 field present, greater than 9224 octets with the CRC32 field present, or not equal to a multiple of 4 octets 😭
- Invalid Header Extension Length Field Value 🧚
an error is considered to have occurred when the Header Extension Length field value is not equal 3 🙈
- Invalid Header Extension - Element Length 🍓
an error is considered to have occurred when the Header Extension - Element Length is greater than 12 💅
- Invalid Header Extension - Version Element Position, Length, or Value 👑
an error is considered to have occurred when a Version element with Length=3, Type=0, and Value=1 does not appear first within the Header Extension, or an element Type=0 appears somewhere other than within the first three octets in the Header Extension 🔥
- Invalid Header Extension - Carrier Selection Element Position, Length, Value or Format 💖
an error is considered to have occurred when a Carrier Selection element does not appear second within the Header Extension, if the Element Type does not equal 1, the Element Length does not equal 4, 6, or 8, the Element Value field is not four BCD encoded decimal digits used in specifying the Carrier Identification Code (CIC), or the identified CIC code is invalid 🥺
- Header Extension PAD Error ✨
an error is considered to have occurred when the Header Extension PAD is 9 octets in length, or if the Header Extension PAD is greater than zero octets in length and the Header Extension PAD does not follow all Header Extension elements or does not begin with at least one octet of all zeros 🌙
- BEtag Mismatch Error 🦋
an error is considered to have occurred when the Beginning-End Tags in the SIP L3PDU header and trailer are not equal 💀
- BAsize Field not equal to Length Field Error 🌈
an error is considered to have occurred when the value of the BAsize Field does not equal the value of the Length Field 🫶
- Incorrect Length Error 🍓
an error is considered to have occurred when the Length field value is not equal to the portion of the SIP L3PDU which extends from the Destination Address field up to and including the CRC32 field (if present), or up to and including the PAD field (if the CRC32 field is not present). as an optional check, an error is considered to have occurred when the length of a partially received SIP L3PDU exceeds the BAsize value 👀
- MRI Timeout Error ⏰
an error is considered to have occurred when the elapsed time between receipt of BOM and corresponding EOM exceeds the value of the MRI (Message Receive Interval) for a particular transport signal format 😤
an entry is indexed by interface number and error type, and contains Source Address, Destination Address and a timestamp. all of these errors are counted in the sipL3Errors counter. when sipL3PDUErrorTimeStamp is equal to zero, the SipL3PDUErrorEntry does not contain any valid information 🧁
::= { sipErrorLog 1 }
sipL3PDUErrorEntry OBJECT-TYPE
SYNTAX SipL3PDUErrorEntry
ACCESS not-accessible
STATUS mandatory
DESCRIPTION
"An entry in the service disagreement table."
INDEX { sipL3PDUErrorIndex, sipL3PDUErrorType }
::= { sipL3PDUErrorTable 1 }
SipL3PDUErrorEntry ::= SEQUENCE {
sipL3PDUErrorIndex
INTEGER,
sipL3PDUErrorType
INTEGER,
sipL3PDUErrorSA
SMDSAddress,
sipL3PDUErrorDA
SMDSAddress,
sipL3PDUErrorTimeStamp
TimeTicks
}
sipL3PDUErrorIndex OBJECT-TYPE
SYNTAX INTEGER (1..65535)
ACCESS read-only
STATUS mandatory
DESCRIPTION
"The value of this object identifies the SIP port
interface for which this entry contains management
information. The value of this object for a
particular interface has the same value as the
ifIndex object, defined in RFC 1156 and RFC 1213,
for the same interface."
::= { sipL3PDUErrorEntry 1 }
sipL3PDUErrorType OBJECT-TYPE
SYNTAX INTEGER {
erroredDAFieldFormat (1),
erroredSAFieldFormat (2),
invalidBAsizeFieldValue (3),
invalidHdrExtLength (4),
invalidHdrExtElementLength (5),
invalidHdrExtVersionElementPositionLenthOrValue (6),
invalidHdrExtCarSelectElementPositionLenghtValueOrFormat (7),
hePADError (8),
beTagMismatch (9),
baSizeFieldNotEqualToLengthField (10),
incorrectLength (11),
mriTimeout (12)
}
ACCESS read-only
STATUS mandatory
DESCRIPTION
"The type of error."
::= { sipL3PDUErrorEntry 2 }
sipL3PDUErrorSA OBJECT-TYPE
SYNTAX SMDSAddress
ACCESS read-only
STATUS mandatory
DESCRIPTION
"A rejected SMDS source address."
::= { sipL3PDUErrorEntry 3 }
sipL3PDUErrorDA OBJECT-TYPE
SYNTAX SMDSAddress
ACCESS read-only
STATUS mandatory
DESCRIPTION
"A rejected SMDS destination address."
::= { sipL3PDUErrorEntry 4 }
sipL3PDUErrorTimeStamp OBJECT-TYPE
SYNTAX TimeTicks
ACCESS read-only
STATUS mandatory
DESCRIPTION
"The timestamp for the service disagreement. The
timestamp contains the value of sysUpTime at the
latest occurrence of this type of service
disagreement. See textual description under
sipL3PDUErrorTable for boundary conditions."
::= { sipL3PDUErrorEntry 5 }
END5. Acknowledgments ✨
this document was produced by the SNMP Working Group 🫶 and the comments of these amazing people were also acknowledged: Ted Brunner, Jeff Case, Tracy Cox, Sherri Hiller, Steve Jaffe, Deirdre Kostick, Dave Piscitello, and Ron Reuss 💖🌸
6. References ✨
Okay bestie, this is the reading list 📚 Every source the spec leans on is here, so you can go check the originals if you want the full story.
[1] Cerf, V., "IAB Recommendations for the Development of Internet Network Management Standards", RFC 1052, NRI, April 1988.
[2] Cerf, V., "Report of the Second Ad Hoc Network Management Review Group", RFC 1109, NRI, August 1989.
[3] Rose M., and K. McCloghrie, "Structure and Identification of Management Information for TCP/IP-based internets", RFC 1155, Performance Systems International, Hughes LAN Systems, May 1990.
[4] McCloghrie K., and M. Rose, "Management Information Base for Network Management of TCP/IP-based internets", RFC 1156, Hughes LAN Systems, Performance Systems International, May 1990.
[5] Case, J., Fedor, M., Schoffstall, M., and J. Davin, "Simple Network Management Protocol", RFC 1157, SNMP Research, Performance Systems International, Performance Systems International, MIT Laboratory for Computer Science, May 1990.
[6] McCloghrie K., and M. Rose, Editors, "Management Information Base for Network Management of TCP/IP-based internets", RFC 1213, Performance Systems International, March 1991.
[7] Information processing systems - Open Systems Interconnection - Specification of Abstract Syntax Notation One (ASN.1), International Organization for Standardization, International Standard 8824, December 1987.
[8] Information processing systems - Open Systems Interconnection - Specification of Basic Encoding Rules for Abstract Notation One (ASN.1), International Organization for Standardization, International Standard 8825, December 1987.
[9] Rose, M., and K. McCloghrie, Editors, "Concise MIB Definitions", RFC 1212, Performance Systems International, Hughes LAN Systems, March 1991.
[10] Rose, M., Editor, "A Convention for Defining Traps for use with the SNMP", RFC 1215, Performance Systems International, March 1991.
[11] "Generic System Requirements in Support of Switched Multi-megabit Data Service", Bellcore Technical Reference, TR-TSV-000772, Issue 1, May 1991.
[12] "Local Access System Generic Requirements, Objectives, and Interfaces in Support of Switched Multi-megabit Data Service", Bellcore Technical Reference, TR-TSV-000773, Issue 1, June 1990.
[13] Baker F., and C. Kolb, Editors, "Definitions of Managed Objects for the DS1 Interface Type", RFC 1232, ACC, Performance Systems International, Inc., May 1991.
[14] Cox, T., and K. Tesink, Editors, "Definitions of Managed Objects for the DS3 Interface Type", RFC 1233, Bell Communications Research, May 1991.
[15] Piscitello, D., and J. Lawrence, Editors, The Transmission of IP Datagrams over the SMDS Service", RFC 1209, Bell Communications Research, March 1991.
[16] "Generic Requirements For SMDS Customer Network Management Service", TA-TSV-001062, Issue 1, February 1991, and Supplement 1, April 1991.
[17] Reynolds, J., "Reassignment of Experimental MIBs to Standard MIBs", RFC 1239, USC/Information Sciences Institute, June 1991.
[18] Tesink, K., "Definitions of Managed Objects for SMDS Subscription", Version 1.0, Bellcore, March 1991.
7. Security Considerations 💀
Okay, this part is short but serious 🫶 The memo itself does not discuss security issues. Security is not covered in this document at all. Plan accordingly, babe 🔒
8. Authors' Addresses 🎀
Here's who wrote this thing, with their contact info 💖
Tracy A. Cox
Bell Communications Research
331 Newman Springs Road
Red Bank, NJ 07701
Phone: (908) 758-2107
EMail: tacox@sabre.bellcore.com
Kaj Tesink
Bell Communications Research
331 Newman Springs Road
Red Bank, NJ 07701
Phone: (908) 758-5254
EMail: kaj@nvuxr.cc.bellcore.com📦 where this page comes from
- ietf: rfc1304 1992-02
- 💖 girlified by claude-haiku-5-5 on : a language model's rewrite of the original, under its terms