ROHC-MIB DEFINITIONS ::= BEGIN

IMPORTS

    MODULE-IDENTITY, OBJECT-TYPE,

    Unsigned32, Counter32, mib-2

        FROM SNMPv2-SMI                                -- [RFC2578]

    TEXTUAL-CONVENTION, TruthValue,

    TimeInterval, DateAndTime

        FROM SNMPv2-TC                                 -- [RFC2579]

    MODULE-COMPLIANCE, OBJECT-GROUP

        FROM SNMPv2-CONF                               -- [RFC2580]

    SnmpAdminString

        FROM SNMP-FRAMEWORK-MIB                        -- [RFC3411]

    ifIndex

        FROM IF-MIB;                                   -- [RFC2863]

rohcMIB MODULE-IDENTITY

    LAST-UPDATED "200406030000Z"  -- June 3, 2004

    ORGANIZATION "IETF Robust Header Compression Working Group"

    CONTACT-INFO

       "WG charter:

          http://www.ietf.org/html.charters/rohc-charter.html

        Mailing Lists:

          General Discussion: rohc@ietf.org

          To Subscribe: rohc-request@ietf.org

          In Body: subscribe your_email_address

        Editor:

          Juergen Quittek

          NEC Europe Ltd.

          Network Laboratories

          Kurfuersten-Anlage 36

          69221 Heidelberg

          Germany

          Tel: +49 6221 90511-15

          EMail: quittek@netlab.nec.de"

    DESCRIPTION

        "This MIB module defines a set of basic objects for

         monitoring and configuring robust header compression.

         The module covers information about running instances

         of ROHC (compressors or decompressors) at IP interfaces.

         Information about compressor contexts and decompressor

         contexts has different structure for different profiles.

         Therefore it is not provided by this MIB module, but by

         individual modules for different profiles.

         Copyright (C) The Internet Society (2004). The

         initial version of this MIB module was published

         in RFC 3816. For full legal notices see the RFC

         itself or see:

         http://www.ietf.org/copyrights/ianamib.html"

    REVISION    "200406030000Z"  -- June 3, 2004

    DESCRIPTION "Initial version, published as RFC 3816."

    ::= { mib-2 112 }

RohcChannelIdentifier ::= TEXTUAL-CONVENTION

    DISPLAY-HINT "d"

    STATUS       current

    DESCRIPTION

        "A number identifying a channel.

         The value of 0 must not be used as identifier

         of an existing channel."

    SYNTAX       Unsigned32 (1..4294967295)

RohcChannelIdentifierOrZero ::= TEXTUAL-CONVENTION

    DISPLAY-HINT "d"

    STATUS       current

    DESCRIPTION

        "A number identifying a channel.

         The value of 0 is indicates that

         no channel is identified."

    SYNTAX       Unsigned32 (0..4294967295)

RohcCompressionRatio ::= TEXTUAL-CONVENTION

    DISPLAY-HINT "d"

    STATUS       current

    DESCRIPTION

        "A number indicating a compression ratio over

         a set of bytes.  The value is defined as

         1000 * bytes(compressed) / bytes(original)

         rounded to the next integer value.

         Note that compressed sets of bytes can be larger

         than the corresponding uncompressed ones.

         Therefore, the number can be greater than 1000."

    SYNTAX       Unsigned32

--

-- The groups defined within this MIB module:

--

rohcObjects       OBJECT IDENTIFIER ::= { rohcMIB 1 }

rohcConformance   OBJECT IDENTIFIER ::= { rohcMIB 2 }

--

-- The ROHC Instance group lists properties of ROHC

-- instances in the rohcInstanceTable, about the channels used

-- by the instances in the rohcChanneltable and about the profiles

-- available at the instances in the rohcProfileTable.

--

rohcInstanceObjects       OBJECT IDENTIFIER ::= { rohcObjects 1 }

--

-- Channel Table

--

-- Listing all channels used for ROHC data channel

-- and/or as feedback channel.

--

rohcChannelTable OBJECT-TYPE

    SYNTAX      SEQUENCE OF RohcChannelEntry

    MAX-ACCESS  not-accessible

    STATUS      current

    DESCRIPTION

        "This table lists and describes all ROHC channels

         per interface."

    ::= { rohcInstanceObjects 1 }

rohcChannelEntry OBJECT-TYPE

    SYNTAX      RohcChannelEntry

    MAX-ACCESS  not-accessible

    STATUS      current

    DESCRIPTION

        "An entry describing a particular script.  Every script that

         is stored in non-volatile memory is required to appear in

         this script table.

         Note, that the rohcChannelID identifies the channel

         uniquely.  The ifIndex is part of the index of this table

         just in order to allow addressing channels per interface."

    INDEX { ifIndex, rohcChannelID }

    ::= { rohcChannelTable 1 }

RohcChannelEntry ::= SEQUENCE {

    rohcChannelID               RohcChannelIdentifier,

    rohcChannelType             INTEGER,

    rohcChannelFeedbackFor      RohcChannelIdentifierOrZero,

    rohcChannelDescr            SnmpAdminString,

    rohcChannelStatus           INTEGER

}

rohcChannelID OBJECT-TYPE

    SYNTAX      RohcChannelIdentifier

    MAX-ACCESS  not-accessible

    STATUS      current

    DESCRIPTION

        "The locally arbitrary, but unique identifier associated

         with this channel.  The value is REQUIRED to be unique

         per ROHC MIB implementation independent of the associated

         interface.

         The value is REQUIRED to remain constant at least from one

         re-initialization of the entity's network management system

         to the next re-initialization.  It is RECOMMENDED that the

         value persist across such re-initializations."

    REFERENCE

        "RFC 3095, Section 5.1.1"

    ::= { rohcChannelEntry 2 }

rohcChannelType OBJECT-TYPE

    SYNTAX      INTEGER {

                    notInUse(1),

                    rohc(2),

                    dedicatedFeedback(3)

                }

    MAX-ACCESS  read-only

    STATUS      current

    DESCRIPTION

        "Type of usage of the channel.  A channel might be currently

         not in use for ROHC or feedback, it might be in use as

         a ROHC channel carrying packets and optional piggy-backed

         feedback, or it might be used as a dedicated feedback

         channel exclusively carrying feedback."

    ::= { rohcChannelEntry 3 }

rohcChannelFeedbackFor OBJECT-TYPE

    SYNTAX      RohcChannelIdentifierOrZero

    MAX-ACCESS  read-only

    STATUS      current

    DESCRIPTION

        "The index of another channel of this interface for which

         the channel serves as feedback channel.

         If no feedback information is transferred on this channel,

         then the value of this ID is 0.  If the channel type is set

         to notInUse(1), then the value of this object must be 0.

         If the channel type is rohc(2) and the value of this object

         is a valid channel ID, then feedback information is

         piggy-backed on the ROHC channel.  If the channel type is

         dedicatedFeedback(3), then feedback is transferred on this

         channel and the value of this object MUST be different from

         0 and MUST identify an existing ROHC channel."

    REFERENCE

        "RFC 3095, Section 5.1.1"

    ::= { rohcChannelEntry 4 }

rohcChannelDescr OBJECT-TYPE

    SYNTAX      SnmpAdminString

    MAX-ACCESS  read-only

    STATUS      current

    DESCRIPTION

        "A textual description of the channel."

    ::= { rohcChannelEntry 5 }

rohcChannelStatus OBJECT-TYPE

    SYNTAX      INTEGER {

                    enabled(1),

                    disabled(2)

                }

    MAX-ACCESS  read-only

    STATUS      current

    DESCRIPTION

        "Status of the channel."

    ::= { rohcChannelEntry 6 }

--

-- Instances of ROHC

--

-- This table lists properties of running instances of ROHC

-- compressors and decompressors at the managed node.

--

rohcInstanceTable OBJECT-TYPE

    SYNTAX      SEQUENCE OF RohcInstanceEntry

    MAX-ACCESS  not-accessible

    STATUS      current

    DESCRIPTION

        "This table lists properties of running instances

         of robust header compressors and decompressors

         at IP interfaces.  It is indexed by interface number,

         the type of instance (compressor or decompressor),

         and the ID of the channel used by the instance as

         ROHC channel.

         Note that the rohcChannelID uniquely identifies an

         instance.  The ifIndex and rohcInstanceType are part

         of the index, because it simplifies accessing instances

         per interface and for addressing either compressors or

         decompressors only."

    ::= { rohcInstanceObjects 2 }

rohcInstanceEntry OBJECT-TYPE

    SYNTAX      RohcInstanceEntry

    MAX-ACCESS  not-accessible

    STATUS      current

    DESCRIPTION

        "An entry describing a particular instance

         of a robust header compressor or decompressor."

    INDEX { ifIndex, rohcInstanceType, rohcChannelID }

    ::= { rohcInstanceTable 1 }

RohcInstanceEntry ::= SEQUENCE {

    rohcInstanceType               INTEGER,

    rohcInstanceFBChannelID        RohcChannelIdentifierOrZero,

    rohcInstanceVendor             OBJECT IDENTIFIER,

    rohcInstanceVersion            SnmpAdminString,

    rohcInstanceDescr              SnmpAdminString,

    rohcInstanceClockRes           Unsigned32,

    rohcInstanceMaxCID             Unsigned32,

    rohcInstanceLargeCIDs          TruthValue,

    rohcInstanceMRRU               Unsigned32,

    rohcInstanceContextStorageTime TimeInterval,

    rohcInstanceStatus             INTEGER,

    rohcInstanceContextsTotal      Counter32,

    rohcInstanceContextsCurrent    Unsigned32,

    rohcInstancePackets            Counter32,

    rohcInstanceIRs                Counter32,

    rohcInstanceIRDYNs             Counter32,

    rohcInstanceFeedbacks          Counter32,

    rohcInstanceCompressionRatio   RohcCompressionRatio

}

rohcInstanceType OBJECT-TYPE

    SYNTAX      INTEGER {

                    compressor(1),

                    decompressor(2)

                }

    MAX-ACCESS  not-accessible

    STATUS      current

    DESCRIPTION

        "Type of the instance of ROHC. It is either a

         compressor instance or a decompressor instance."

    ::= { rohcInstanceEntry 2 }

rohcInstanceFBChannelID OBJECT-TYPE

    SYNTAX      RohcChannelIdentifierOrZero

    MAX-ACCESS  read-only

    STATUS      current

    DESCRIPTION

        "Identifier of the channel used for feedback.

         If no feedback channel is used, the value of

         this object is 0 ."

    REFERENCE

        "RFC 3095, Section 5.1.1"

    ::= { rohcInstanceEntry 4 }

rohcInstanceVendor OBJECT-TYPE

    SYNTAX      OBJECT IDENTIFIER

    MAX-ACCESS  read-only

    STATUS      current

    DESCRIPTION

        "An object identifier that identifies the vendor who

         provides the implementation of robust header description.

         This object identifier SHALL point to the object identifier

         directly below the enterprise object identifier

         {1 3 6 1 4 1} allocated for the vendor.  The value must be

         the object identifier {0 0} if the vendor is not known."

    ::= { rohcInstanceEntry 5 }

rohcInstanceVersion OBJECT-TYPE

    SYNTAX      SnmpAdminString (SIZE (0..32))

    MAX-ACCESS  read-only

    STATUS      current

    DESCRIPTION

        "The version number of the implementation of robust header

         compression.  The zero-length string shall be used if the

         implementation does not have a version number.

         It is suggested that the version number consist of one or

         more decimal numbers separated by dots, where the first

         number is called the major version number."

    ::= { rohcInstanceEntry 6 }

rohcInstanceDescr OBJECT-TYPE

    SYNTAX      SnmpAdminString

    MAX-ACCESS  read-only

    STATUS      current

    DESCRIPTION

        "A textual description of the implementation."

    ::= { rohcInstanceEntry 7 }

rohcInstanceClockRes OBJECT-TYPE

    SYNTAX      Unsigned32

    UNITS       "milliseconds"

    MAX-ACCESS  read-only

    STATUS      current

    DESCRIPTION

        "This object indicates the system clock resolution in

         units of milliseconds.  A zero (0) value means that there

         is no clock available."

    ::= { rohcInstanceEntry 8 }

rohcInstanceMaxCID OBJECT-TYPE

    SYNTAX      Unsigned32 (1..16383)

    MAX-ACCESS  read-only

    STATUS      current

    DESCRIPTION

        "The highest context ID number to be used by the

         compressor.  Note that this parameter is not coupled to,

         but in effect further constrained by,

         rohcChannelLargeCIDs."

    REFERENCE

        "RFC 3095, Section 5.1.1"

    ::= { rohcInstanceEntry 9 }

rohcInstanceLargeCIDs OBJECT-TYPE

    SYNTAX      TruthValue

    MAX-ACCESS  read-only

    STATUS      current

    DESCRIPTION

        "When retrieved, this boolean object returns false if

         the short CID representation (0 bytes or 1 prefix byte,

         covering CID 0 to 15) is used; it returns true, if the

         embedded CID representation (1 or 2 embedded CID bytes

         covering CID 0 to 16383) is used."

    REFERENCE

        "RFC 3095, Section 5.1.1"

    ::= { rohcInstanceEntry 10 }

rohcInstanceMRRU OBJECT-TYPE

    SYNTAX      Unsigned32

    MAX-ACCESS  read-only

    STATUS      current

    DESCRIPTION

        "Maximum reconstructed reception unit.  This is the

         size of the largest reconstructed unit in octets that

         the decompressor is expected to reassemble from

         segments (see RFC 3095, Section 5.2.5).  Note that this

         size includes the CRC.  If MRRU is negotiated to be 0,

         no segment headers are allowed on the channel."

    REFERENCE

        "RFC 3095, Section 5.1.1"

    ::= { rohcInstanceEntry 11 }

rohcInstanceContextStorageTime OBJECT-TYPE

    SYNTAX      TimeInterval

    UNITS       "centi-seconds"

    MAX-ACCESS  read-write

    STATUS      current

    DESCRIPTION

        "This object indicates the default maximum amount of time

         information on a context belonging to this instance is kept

         as entry in the rohcContextTable after the context is

         expired or terminated.  The value of this object is used

         to initialize rohcContexStorageTime object when a new

         context is created.

         Changing the value of an rohcInstanceContextStorageTime

         instance does not affect any entry of the rohcContextTable

         created previously.

         ROHC-MIB implementations SHOULD store the set value of this

         object persistently."

    DEFVAL { 360000 }

    ::= { rohcInstanceEntry 12 }

rohcInstanceStatus OBJECT-TYPE

    SYNTAX      INTEGER {

                    enabled(1),

                    disabled(2)

                }

    MAX-ACCESS  read-only

    STATUS      current

    DESCRIPTION

        "Status of the instance of ROHC."

    ::= { rohcInstanceEntry 13 }

rohcInstanceContextsTotal OBJECT-TYPE

    SYNTAX      Counter32

    MAX-ACCESS  read-only

    STATUS      current

    DESCRIPTION

        "Counter of all contexts created by this instance.

         Discontinuities in the value of this counter can

         occur at re-initialization of the management

         system, and at other times as indicated by the

         value of ifCounterDiscontinuityTime."

    ::= { rohcInstanceEntry 14 }

rohcInstanceContextsCurrent OBJECT-TYPE

    SYNTAX      Unsigned32

    MAX-ACCESS  read-only

    STATUS      current

    DESCRIPTION

        "Number of currently active contexts created by this

         instance."

    ::= { rohcInstanceEntry 15 }

rohcInstancePackets OBJECT-TYPE

    SYNTAX      Counter32

    MAX-ACCESS  read-only

    STATUS      current

    DESCRIPTION

        "Counter of all packets passing this instance.

         Discontinuities in the value of this counter can

         occur at re-initialization of the management

         system, and at other times as indicated by the

         value of ifCounterDiscontinuityTime."

    ::= { rohcInstanceEntry 16 }

rohcInstanceIRs OBJECT-TYPE

    SYNTAX      Counter32

    MAX-ACCESS  read-only

    STATUS      current

    DESCRIPTION

        "The number of all IR packets that are either sent

         or received by this instance.

         Discontinuities in the value of this counter can

         occur at re-initialization of the management

         system, and at other times as indicated by the

         value of ifCounterDiscontinuityTime."

    REFERENCE

        "RFC 3095, Section 5.7.7.1"

    ::= { rohcInstanceEntry 17 }

rohcInstanceIRDYNs OBJECT-TYPE

    SYNTAX      Counter32

    MAX-ACCESS  read-only

    STATUS      current

    DESCRIPTION

        "The number of all IR-DYN packets that are either sent

         or received by this instance.

         Discontinuities in the value of this counter can

         occur at re-initialization of the management

         system, and at other times as indicated by the

         value of ifCounterDiscontinuityTime."

    REFERENCE

        "RFC 3095, Section 5.7.7.2"

    ::= { rohcInstanceEntry 18 }

rohcInstanceFeedbacks OBJECT-TYPE

    SYNTAX      Counter32

    MAX-ACCESS  read-only

    STATUS      current

    DESCRIPTION

        "The number of all feedbacks that are either sent

         or received by this instance.

         Discontinuities in the value of this counter can

         occur at re-initialization of the management

         system, and at other times as indicated by the

         value of ifCounterDiscontinuityTime."

    ::= { rohcInstanceEntry 19 }

rohcInstanceCompressionRatio OBJECT-TYPE

    SYNTAX      RohcCompressionRatio

    MAX-ACCESS  read-only

    STATUS      current

    DESCRIPTION

        "This object indicates the compression ratio so far over all

         packets on the channel served by this instance.  The

         compression is computed over all bytes of the IP packets

         including the IP header but excluding all lower layer

         headers."

    ::= { rohcInstanceEntry 20 }

--

-- Profile Table

--

rohcProfileTable OBJECT-TYPE

    SYNTAX      SEQUENCE OF RohcProfileEntry

    MAX-ACCESS  not-accessible

    STATUS      current

    DESCRIPTION

        "This table lists a set of profiles supported by the

         instance."

    REFERENCE

        "RFC 3095, Section 5.1.1"

    ::= { rohcInstanceObjects 3 }

rohcProfileEntry OBJECT-TYPE

    SYNTAX      RohcProfileEntry

    MAX-ACCESS  not-accessible

    STATUS      current

    DESCRIPTION

        "An entry describing a particular profile supported by

         the instance.  It is indexed by the rohcChannelID

         identifying the instance and by the rohcProfile."

    INDEX { rohcChannelID, rohcProfile }

    ::= { rohcProfileTable 1 }

RohcProfileEntry ::= SEQUENCE {

    rohcProfile            Unsigned32,

    rohcProfileVendor      OBJECT IDENTIFIER,

    rohcProfileVersion     SnmpAdminString,

    rohcProfileDescr       SnmpAdminString,

    rohcProfileNegotiated  TruthValue

}

rohcProfile OBJECT-TYPE

    SYNTAX      Unsigned32 (0..65535)

    MAX-ACCESS  not-accessible

    STATUS      current

    DESCRIPTION

        "Identifier of a profile supported.  For a listing of

         possible profile values, see the IANA registry for

         'RObust Header Compression (ROHC) Profile Identifiers'

         at http://www.iana.org/assignments/rohc-pro-ids"

    ::= { rohcProfileEntry 2 }

rohcProfileVendor OBJECT-TYPE

    SYNTAX      OBJECT IDENTIFIER

    MAX-ACCESS  read-only

    STATUS      current

    DESCRIPTION

        "An object identifier that identifies the vendor who

         provides the implementation of robust header description.

         This object identifier SHALL point to the object identifier

         directly below the enterprise object identifier

         {1 3 6 1 4 1} allocated for the vendor.  The value must be

         the object identifier {0 0} if the vendor is not known."

    ::= { rohcProfileEntry 3 }

rohcProfileVersion OBJECT-TYPE

    SYNTAX      SnmpAdminString (SIZE (0..32))

    MAX-ACCESS  read-only

    STATUS      current

    DESCRIPTION

        "The version number of the implementation of robust header

         compression.  The zero-length string shall be used if the

         implementation does not have a version number.

         It is suggested that the version number consist of one or

         more decimal numbers separated by dots, where the first

         number is called the major version number."

    ::= { rohcProfileEntry 4 }

rohcProfileDescr OBJECT-TYPE

    SYNTAX      SnmpAdminString

    MAX-ACCESS  read-only

    STATUS      current

    DESCRIPTION

        "A textual description of the implementation."

    ::= { rohcProfileEntry 5 }

rohcProfileNegotiated OBJECT-TYPE

    SYNTAX      TruthValue

    MAX-ACCESS  read-only

    STATUS      current

    DESCRIPTION

        "When retrieved, this boolean object returns true

         if the profile has been negotiated to be used at

         the instance, i.e., is supported also be the

         corresponding compressor/decompressor."

    ::= { rohcProfileEntry 6 }

--

-- Context Table

--

rohcContextTable OBJECT-TYPE

    SYNTAX      SEQUENCE OF RohcContextEntry

    MAX-ACCESS  not-accessible

    STATUS      current

    DESCRIPTION

        "This table lists and describes all compressor contexts

         per instance."

    ::= { rohcObjects 2 }

rohcContextEntry OBJECT-TYPE

    SYNTAX      RohcContextEntry

    MAX-ACCESS  not-accessible

    STATUS      current

    DESCRIPTION

        "An entry describing a particular compressor context."

    INDEX {

        rohcChannelID,

        rohcContextCID

    }

    ::= { rohcContextTable 1 }

RohcContextEntry ::= SEQUENCE {

    rohcContextCID                  Unsigned32,

    rohcContextCIDState             INTEGER,

    rohcContextProfile              Unsigned32,

    rohcContextDecompressorDepth    Unsigned32,

    rohcContextStorageTime          TimeInterval,

    rohcContextActivationTime       DateAndTime,

    rohcContextDeactivationTime     DateAndTime,

    rohcContextPackets              Counter32,

    rohcContextIRs                  Counter32,

    rohcContextIRDYNs               Counter32,

    rohcContextFeedbacks            Counter32,

    rohcContextDecompressorFailures Counter32,

    rohcContextDecompressorRepairs  Counter32,

    rohcContextAllPacketsRatio      RohcCompressionRatio,

    rohcContextAllHeadersRatio      RohcCompressionRatio,

    rohcContextAllPacketsMeanSize   Unsigned32,

    rohcContextAllHeadersMeanSize   Unsigned32,

    rohcContextLastPacketsRatio     RohcCompressionRatio,

    rohcContextLastHeadersRatio     RohcCompressionRatio,

    rohcContextLastPacketsMeanSize  Unsigned32,

    rohcContextLastHeadersMeanSize  Unsigned32

}

rohcContextCID OBJECT-TYPE

    SYNTAX      Unsigned32 (0..16383)

    MAX-ACCESS  not-accessible

    STATUS      current

    DESCRIPTION

        "The context identifier (CID) of this context."

    REFERENCE

        "RFC 3095, Sections 5.1.1 and 5.1.3"

    ::= { rohcContextEntry 2 }

rohcContextCIDState OBJECT-TYPE

    SYNTAX      INTEGER {

                    unused(1),

                    active(2),

                    expired(3),

                    terminated(4)

                }

    MAX-ACCESS  read-only

    STATUS      current

    DESCRIPTION

        "State of the CID.  When a CID is assigned to a context,

         its state changes from `unused' to `active'.  The active

         context may stop operation due to some explicit

         signalling or after observing no packet for some specified

         time.  In the first case then the CID state changes to

         `terminated', in the latter case it changes to `expired'.

         If the CID is re-used again for another context, the

         state changes back to `active'."

    ::= { rohcContextEntry 3 }

rohcContextProfile OBJECT-TYPE

    SYNTAX      Unsigned32 (0..65535)

    MAX-ACCESS  read-only

    STATUS      current

    DESCRIPTION

        "Identifier of the profile for this context.

         The profile is identified by its index in the

         rohcProfileTable for this instance.  There MUST exist a

         corresponding entry in the rohcProfileTable using the

         value of rohcContextProfile as second part of the index

         (and using the same rohcChannelID as first part of the

         index)."

    ::= { rohcContextEntry 4 }

rohcContextDecompressorDepth OBJECT-TYPE

    SYNTAX      Unsigned32

    MAX-ACCESS  read-only

    STATUS      current

    DESCRIPTION

        "This object indicates whether reverse decompression, for

         example as described in RFC 3095, Section 6.1, is used

         on this channel or not, and if used, to what extent.

         Its value is only valid for decompressor contexts, i.e.,

         if rohcInstanceType has the value decompressor(2).  For

         compressor contexts where rohcInstanceType has the value

         compressor(1), the value of this object is irrelevant

         and MUST be set to zero (0).

         The value of the reverse decompression depth indicates

         the maximum number of packets that are buffered, and thus

         possibly be reverse decompressed by the decompressor.

         A zero (0) value means that reverse decompression is not

         used."

    ::= { rohcContextEntry 5 }

rohcContextStorageTime OBJECT-TYPE

    SYNTAX      TimeInterval

    UNITS       "centi-seconds"

    MAX-ACCESS  read-write

    STATUS      current

    DESCRIPTION

        "The value of this object specifies how long this row

         can exist in the rohcContextTable after the

         rohcContextCIDState switched to expired(3) or

         terminated(4).  This object returns  the remaining time

         that the row may exist before it is aged out.  The object

         is initialized with the value of the  associated

         rohcContextStorageTime object.  After expiration or

         termination of the context, the value of this object ticks

         backwards.  The entry in the rohcContextTable is destroyed

         when the value reaches 0.

         The value of this object may be set in order to increase or

         reduce the remaining time that the row may exist.  Setting

         the value to 0 will destroy this entry as soon as the

         rochContextCIDState has the value expired(3) or

         terminated(4).

         Note that there is no guarantee that the row is stored as

         long as this object indicates.  In case of limited CID

         space, the instance may re-use a CID before the storage

         time of the corresponding row in rohcContextTable reaches

         the value of 0.  In this case the information stored in this

         row is not anymore available."

    ::= { rohcContextEntry 6 }

rohcContextActivationTime OBJECT-TYPE

    SYNTAX      DateAndTime

    MAX-ACCESS  read-only

    STATUS      current

    DESCRIPTION

        "The date and time when the context started to be able to

         compress packets or decompress packets, respectively.

         The value '0000000000000000'H is returned if the context

         has not been activated yet."

    DEFVAL { '0000000000000000'H }

    ::= { rohcContextEntry 7 }

rohcContextDeactivationTime OBJECT-TYPE

    SYNTAX      DateAndTime

    MAX-ACCESS  read-only

    STATUS      current

    DESCRIPTION

        "The date and time when the context stopped being able to

         compress packets or decompress packets, respectively,

         because it expired or was terminated for other reasons.

         The value '0000000000000000'H is returned if the context

         has not been deactivated yet."

    DEFVAL { '0000000000000000'H }

    ::= { rohcContextEntry 8 }

rohcContextPackets OBJECT-TYPE

    SYNTAX      Counter32

    MAX-ACCESS  read-only

    STATUS      current

    DESCRIPTION

        "The number of all packets passing this context.

         Discontinuities in the value of this counter can

         occur at re-initialization of the management

         system, and at other times as indicated by the

         value of ifCounterDiscontinuityTime.  For checking

         ifCounterDiscontinuityTime, the interface index is

         required.  It can be determined by reading the

         rohcChannelTable."

    ::= { rohcContextEntry 9 }

rohcContextIRs OBJECT-TYPE

    SYNTAX      Counter32

    MAX-ACCESS  read-only

    STATUS      current

    DESCRIPTION

        "The number of all IR packets sent or received,

         respectively, by this context.

         Discontinuities in the value of this counter can

         occur at re-initialization of the management

         system, and at other times as indicated by the

         value of ifCounterDiscontinuityTime.  For checking

         ifCounterDiscontinuityTime, the interface index is

         required.  It can be determined by reading the

         rohcChannelTable."

    REFERENCE

        "RFC 3095, Section 5.7.7.1"

    ::= { rohcContextEntry 10 }

rohcContextIRDYNs OBJECT-TYPE

    SYNTAX      Counter32

    MAX-ACCESS  read-only

    STATUS      current

    DESCRIPTION

        "The number of all IR-DYN packets sent or received,

         respectively, by this context.

         Discontinuities in the value of this counter can

         occur at re-initialization of the management

         system, and at other times as indicated by the

         value of ifCounterDiscontinuityTime.  For checking

         ifCounterDiscontinuityTime, the interface index is

         required.  It can be determined by reading the

         rohcChannelTable."

    REFERENCE