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CTRON-ALIAS-MIB by vendor Enterasys Networks Inc

CTRON-ALIAS-MIB file content

The SNMP protocol is used to for conveying information and commands between agents and managing entities. SNMP uses the User Datagram Protocol (UDP) as the transport protocol for passing data between managers and agents. The reasons for using UDP for SNMP are, firstly it has low overheads in comparison to TCP, which uses a 3-way hand shake for connection. Secondly, in congested networks, SNMP over TCP is a bad idea because TCP in order to maintain reliability will flood the network with retransmissions.

Management information (MIB) is represented as a collection of managed objects. These objects together form a virtual information base called MIB. An agent may implement many MIBs, but all agents must implement a particular MIB called MIB-II [16]. This standard defines variables for things such as interface statistics (interface speeds, MTU, octets sent, octets received, etc.) as well as various other things pertaining to the system itself (system location, system contact, etc.). The main goal of MIB-II is to provide general TCP/IP management information.

Use ActiveXperts Network Monitor 2019 to import vendor-specific MIB files, inclusing CTRON-ALIAS-MIB.


Vendor: Enterasys Networks Inc
Mib: CTRON-ALIAS-MIB  [download]  [view objects]
Tool: ActiveXperts Network Monitor 2019 [download]    (ships with advanced SNMP/MIB tools)
CTRON-ALIAS-MIB DEFINITIONS ::= BEGIN

--  ctron-alias-mib.txt
--
--  Part Number:
--
--

--  This module provides authoritative definitions for Enterasys
--  Networks' Alias MIB.

--
--  This module will be extended, as needed.

--  Enterasys Networks reserves the right to make changes in
--  specification and other information contained in this document
--  without prior notice.  The reader should consult Enterasys Networks
--  to determine whether any such changes have been made.
--
--  In no event shall Enterasys Networks be liable for any incidental,
--  indirect, special, or consequential damages whatsoever (including
--  but not limited to lost profits) arising out of or related to this
--  document or the information contained in it, even if Enterasys
--  Networks has been advised of, known, or should have known, the
--  possibility of such damages.
--
--  Enterasys grants vendors, end-users, and other interested parties
--  a non-exclusive license to use this Specification in connection
--  with the management of Enterasys products.
--
--  Copyright August, 1999-2003 Enterasys Networks, Inc.

IMPORTS
        MODULE-IDENTITY, OBJECT-TYPE, Integer32, Gauge32, Counter32,
             Unsigned32, TimeTicks
                  FROM SNMPv2-SMI
        MODULE-COMPLIANCE, OBJECT-GROUP
                  FROM SNMPv2-CONF
        TEXTUAL-CONVENTION, MacAddress, TruthValue
                  FROM SNMPv2-TC
        SnmpAdminString
                  FROM SNMP-FRAMEWORK-MIB
        InterfaceIndex 
                FROM IF-MIB
        TimeFilter
                FROM RMON2-MIB
        VlanIndex
                FROM Q-BRIDGE-MIB
        EnabledStatus 
                FROM P-BRIDGE-MIB
        ctAliasMib
                  FROM CTRON-MIB-NAMES;

cabletronAliasMib MODULE-IDENTITY
    LAST-UPDATED "200304281327Z"  -- Mon Apr 28 13:27 GMT 2003
    ORGANIZATION "Enterasys Networks, Inc"
    CONTACT-INFO
         "Postal: Enterasys Networks
                  50 Minuteman Rd.
                  Andover, MA 01810-1008
                  USA
          Phone:  +1 978 684 1000
          E-mail: support@enterasys.com
          WWW:    http://www.enterasys.com"

    DESCRIPTION
            "This MIB module defines a portion of the MIB tree
             under the Enterasys enterprise OID. This branch 
             defines Enterasys Networks' proprietary Node Alias
             feature.

             This MIB defines objects which can be used to discover 
             end systems per port, and to map end system addresses
             to the layer 2 address of the port."


    REVISION    "200304221339Z"  -- Tue Apr 22 13:39 GMT 2003
    DESCRIPTION "Added the ctAliasMacAddressTable and
                 ctAliasProtocolAddressTable. Added the objects
                 ctAliasEntryStatus and ctAliasEntryClearAll.
                 Deprecated the object ctAliasMarkInactive."

    REVISION    "200201301301Z"  -- Wed Jan 30 13:01 GMT 2002
    DESCRIPTION "Added the optional ctAliasConfigurationTable."

    REVISION    "200201232056Z"  -- Wed Jan 23 20:56 GMT 2002
    DESCRIPTION "Added ctAliasAddressText leaf with the syntax of
                 SnmpAdminString."

    REVISION    "200201182022Z"  -- Fri Jan 18 20:22 GMT 2002
    DESCRIPTION "Added textual convention AliasAddress.  Changed
                 the syntax for ctAliasAddress from SnmpAdminString
                 to AliasAddress.  Added ranges to ctAliasReference
                 and ctAliasID."

    REVISION    "199909260000Z"
    DESCRIPTION "Moved the CabletronProtocolTC enumeration value 
                 unknown to unknown(0).  Updated textual descriptions."

    REVISION    "199909040000Z"
    DESCRIPTION "Changed removed the ctAliasProtocolDirLocalID.
                 Updated units of conformance and compliance
                 statements."

    REVISION    "199908060000Z"
    DESCRIPTION "Changed object naming to be more cabletron-general.
                 Changed indexing to simplify access."

    REVISION    "199907280000Z"
    DESCRIPTION "The initial version of this MIB module"

         ::= { ctAliasMib 1 } 

-- Textual Conventions

CabletronProtocolTC ::= TEXTUAL-CONVENTION
                STATUS  current
                DESCRIPTION
                    "Identifies the type of protocol address."
                SYNTAX  INTEGER
                {
                   unknown(0),
                   ip(1),
                   apl(2),
                   mac(3),
                   hsrp(4),
                   dhcps(5),
                   dhcpc(6),
                   bootps(7),
                   bootpc(8),
                   ospf(9),
                   vrrp(10),
                   ipx(11),
                   xrip(12),
                   xsap(13),
                   xnlsp(14),
                   ipx20(15),
                   rtmp(16),
                   netBios(17),
                   nbt(18),
                   n802q(19),
                   bgp(20),
                   rip(21),
                   igrp(22),
                   dec(23),
                   bpdu(24),
                   udp(25)
                }

AliasAddress ::= TEXTUAL-CONVENTION
    DISPLAY-HINT "1x "
    STATUS       current
    DESCRIPTION
          "Represents layer 3 or higher addresses."
    SYNTAX       OCTET STRING (SIZE (0..32))

-- branches used in this MIB

   ctAlias OBJECT IDENTIFIER ::= { cabletronAliasMib 1 }
   
-- Alias Table

ctAliasTable OBJECT-TYPE
        SYNTAX  SEQUENCE OF CtAliasEntry
        MAX-ACCESS   not-accessible
        STATUS  current
        DESCRIPTION
             "The ctAliasTable contains information about the aliases
             known by the agent.  This table is indexed using a unique
             and arbitrary ID and a TimeFilter to allow a management
             station to learn all alias entries that have been modified
             since time X.  This table is NOT designed to do a single
             GET.  This Table is designed for MIB Walks only.

             This table contains objects that map upper-layer 
             network services and entities to the physical location 
             of the associated port, and the MAC address of the
             associated end-system (node).

             All entries in this table are deleted when sysUpTime
             is reset to zero.

             This table allows for a time filtered view.  It is useful 
             for determining what has been modified in the Alias Table 
             since a specified time.

             If a management station reads the ctAliasTable
             of an entity at time X, subsequent updates can be 
             realized by performing get-next requests of this
             table to determine which entries have been modified 
             since time X. Then the management station can use
             GET requests to retrieve only the records of interest
             from the Alias table. 

             There is a delay between retrieving the Alias Reference 
             values from this table, and a GET request to retrieve a 
             modified row from the Alias table. The management 
             station should be prepared for two possibilities:
             1) the GET request may fail if the Alias table entry 
             has been deleted during the delay, and 2) the 
             entry may have been modified during the delay, so the
             modification time of the retrieved entry may differ from 
             the modification time of the Delta entry.

             If the entry in the Alias Control table identified by 
             ctAliasID is marked inactive by management request, and 
             subsequently deleted to free resources, all corresponding 
             entries in this table are also deleted.

             If the agent needs to free resources, it can delete
             entries from this table. It SHOULD first remove those
             which have been marked inactive in the ctAliasControlTable, 
             then it SHOULD remove those entries with the oldest 
             modification times." 
         ::= { ctAlias 1 }

ctAliasEntry OBJECT-TYPE
        SYNTAX  CtAliasEntry
        MAX-ACCESS   not-accessible
        STATUS  current
        DESCRIPTION
            "Each entry contains information pertaining to 
             the alias of a node."
        INDEX   { ctAliasTimeFilter, ctAliasReference }
        ::=     { ctAliasTable 1 }

CtAliasEntry ::=
        SEQUENCE 
        {
                ctAliasTimeFilter         TimeFilter,
                ctAliasReference          Integer32,
                ctAliasInterface          InterfaceIndex,
                ctAliasMacAddress         MacAddress,
                ctAliasVlanID             VlanIndex,
                ctAliasProtocol           CabletronProtocolTC,
                ctAliasAddress            AliasAddress,
                ctAliasIsActive           TruthValue,
                ctAliasAddressText        SnmpAdminString
        }

ctAliasTimeFilter  OBJECT-TYPE
        SYNTAX  TimeFilter
        MAX-ACCESS  not-accessible
        STATUS  current
        DESCRIPTION
            "The value of sysUpTime when this entry 
             was last modified."
        ::= { ctAliasEntry 1 }

ctAliasReference  OBJECT-TYPE
        SYNTAX  Integer32 (0..2147483647)
        MAX-ACCESS  not-accessible
        STATUS  current
        DESCRIPTION
            "An integer ID assigned by the agent. The value of this
                         object is equal to an existing ctAliasID."
        ::= { ctAliasEntry 2 }

ctAliasInterface OBJECT-TYPE
        SYNTAX InterfaceIndex 
        MAX-ACCESS  read-only
        STATUS current
        DESCRIPTION
            "The ifIndex of the interface on which this entry was 
             discovered.

             The ifIndex is an 'external value' that identifies a 
             physical component associated with the Alias entry.
             This object can be used to identify the physical
             location of the interface in the ifTable [RFC2863].  

             The possibility of ifIndex value re-assignment must be
             accommodated by a management application whenever the 
             value of sysUpTime is reset to zero.

             Since ifIndex values in different 'naming scopes' are 
             not related to one another, the interface to physical 
             component associations are relative to the same
             logical entity within the agent. For more discussion 
             of naming scopes, see the ENTITY-MIB [RFC2037]"
        ::= { ctAliasEntry 3 }

ctAliasMacAddress OBJECT-TYPE
        SYNTAX MacAddress
        MAX-ACCESS  read-only
        STATUS current
        DESCRIPTION
            "The MAC address associated with this alias.  
 
             The TEXTUAL-CONVENTION MacAddress is defined in
             SNMPv2-TC as an 802 MAC address represented in 
             'canonical' order as defined by IEEE 802.1a,
             i.e., as if it were transmitted least significant
             bit first."
        ::= { ctAliasEntry 4 }

ctAliasVlanID OBJECT-TYPE
        SYNTAX VlanIndex
        MAX-ACCESS  read-only
        STATUS current
        DESCRIPTION
            "The VLAN ID contained in the header of the message
             associated with this alias.

             On agents which support this MIB but do not support
             VLANs, the value for this object MUST be (1)."
        ::= { ctAliasEntry 5 }

ctAliasProtocol OBJECT-TYPE
        SYNTAX  CabletronProtocolTC
        MAX-ACCESS  read-only
        STATUS  current
        DESCRIPTION
            "The address type of this alias address."
        ::= { ctAliasEntry 6 }

ctAliasAddress OBJECT-TYPE
        SYNTAX       AliasAddress
        MAX-ACCESS   read-only
        STATUS       current
        DESCRIPTION
            "The address associated with this entry.  The exact
             format of this object will depend upon the protocol
             type in ctAliasProtocol.  The value returned for
             this object MUST be in a non-textual format."
        ::= { ctAliasEntry 7 }

ctAliasIsActive  OBJECT-TYPE
        SYNTAX  TruthValue
        MAX-ACCESS  read-only
        STATUS  current
        DESCRIPTION
            "The status of this entry.

             A true(1) value indicates the alias is active.

             A false(2) value indicates an entry which has 
             been marked inactive by network management, using the
             ctAliasEntryStatus object in the ctAliasControlTable.  

             Entries which have been marked inactive may remain in 
             the table to allow consistent mappings between network 
             management stations until an agent needs to free 
             resources."
        ::= { ctAliasEntry 8 }

ctAliasAddressText OBJECT-TYPE
        SYNTAX       SnmpAdminString
        MAX-ACCESS   read-only
        STATUS       current
        DESCRIPTION
            "The address associated with this entry in a human
             readable textual format."
        ::= { ctAliasEntry 9 }

-- Alias Control Table

ctAliasControlTable OBJECT-TYPE
        SYNTAX  SEQUENCE OF CtAliasControlEntry
        MAX-ACCESS   not-accessible
        STATUS  current
        DESCRIPTION
            "This table allows for control of Alias entries.

             Currently control is limited to marking entries
             as marked for deletion.

             If the entry in the Alias Control table identified by 
             ctAliasID is marked inactive by management request, and 
             subsequently deleted to free resources, all corresponding 
             entries in the ctAlias table are also deleted.

             All entries in this table are deleted when sysUpTime
             is reset to zero."

         ::= { ctAlias 2 }

ctAliasControlEntry OBJECT-TYPE
        SYNTAX  CtAliasControlEntry
        MAX-ACCESS   not-accessible
        STATUS  current
        DESCRIPTION
            "Each entry contains a unique identifier of an Alias 
             entry and a control object to mark the entry as 
             'marked for deletion'."
        INDEX   { ctAliasID }
        ::=     { ctAliasControlTable 1 }

CtAliasControlEntry ::=
        SEQUENCE 
        {
                ctAliasID               Integer32,
                ctAliasMarkInactive     TruthValue,
                ctAliasEntryStatus      INTEGER
        }

ctAliasID  OBJECT-TYPE
        SYNTAX  Integer32 (0..2147483647)
        MAX-ACCESS  not-accessible
        STATUS  current
        DESCRIPTION
            "A unique and arbitrary integer ID assigned
             by the agent to identify this entry. 

             Each identifier must not be reused until the agent
             is re-initialized, i.e. sysUpTime is reset to zero."
        ::= { ctAliasControlEntry 1 }

ctAliasMarkInactive  OBJECT-TYPE
        SYNTAX TruthValue
        MAX-ACCESS read-write
        STATUS deprecated
        DESCRIPTION
            "This object provides the control to mark this entry
             to inactive. 

             When an entry is created by the agent, this is set to
             false(2). A network management application can set this
             value to true(1), indicating that the entry is no longer
             needed. Once this object has been set to true(1), it
             cannot be set to false(2). 

             If the alias is detected again by the agent, the agent
             may create a new entry for the Alias.

             When an agent needs to free up resources, it may choose
             to delete those entries marked inactive."
        ::= { ctAliasControlEntry 2 }

ctAliasEntryStatus OBJECT-TYPE
        SYNTAX INTEGER 
        {
               active(1),
               inactive(2),
               remove(3)
        }
        MAX-ACCESS read-write
        STATUS current
        DESCRIPTION
            "This object provides the control to remove or inactivate
             entries that are no longer needed.

             active(1)   - indicates that this entry is active.

             inactive(2) - indicates that this entry is no longer of any
                           interest and can be removed, as needed, by
                           the entity. If the alias is marked inactive
                           and is seen again by the agent, the alias
                           ID's status will be changed to active.

             remove(3)   - indicates that the agent SHOULD immediately
                           remove the entry from the table. If the alias
                           is seen again by the agent after having been 
                           removed, it will be added as a new aliasID."
        ::= { ctAliasControlEntry 3 }

         
-- Alias Table Statistics

ctAliasStats  OBJECT IDENTIFIER ::= { ctAlias 3 }

ctAliasTableStatsTotalEntries  OBJECT-TYPE
        SYNTAX  Gauge32
        MAX-ACCESS      read-only
        STATUS   current
        DESCRIPTION
            "The total number of entries in the ctAliasControlTable."
        ::=      { ctAliasStats 1 }

ctAliasTableStatsActiveEntries OBJECT-TYPE
        SYNTAX  Gauge32
        MAX-ACCESS      read-only
        STATUS   current
        DESCRIPTION
            "The total number of active entries in the 
             ctAliasControlTable."
        ::=      { ctAliasStats 2 }

ctAliasTableStatsPurgeTime OBJECT-TYPE
        SYNTAX  TimeTicks
        MAX-ACCESS      read-only
        STATUS   current
        DESCRIPTION
            "System time of the most recent purge."
        ::=      { ctAliasStats 3 }

ctAliasTableStatsState OBJECT-TYPE
        SYNTAX  INTEGER
        {
                    notStarted(1),
                    ready(2),
                    full(3)
        }
        MAX-ACCESS      read-only
        STATUS   current
        DESCRIPTION
            "Current Alias Table state.

                notStarted(1) indicates the agent has not 
                completed any required start up routines and
                therefore the ctAliasTable and ctAliasControlTable
                are not currently valid.

                ready(2) indicates that the agent has completed 
                all initialization procedures and that the alias 
                MIB is running properly.

                full(3) indicates that due to memory restrictions
                on the agent, the ctaliasTable has reached the 
                maximum number of entries possible.

                NOTE: If an agent is using a circular queue design, 
                then the state of full(3) will never be set."
        ::=       { ctAliasStats 4 }


-- Alias Configuration

ctAliasConfiguration OBJECT IDENTIFIER ::= { ctAlias 4 }

ctAliasConfigurationSystemAllocatedEntries  OBJECT-TYPE
        SYNTAX Gauge32 
        MAX-ACCESS  read-only
        STATUS  current
        DESCRIPTION
            "The total number of alias entries allocated."
        ::= { ctAliasConfiguration 1 }

ctAliasConfigurationSystemTotalEntries  OBJECT-TYPE
        SYNTAX Gauge32 
        MAX-ACCESS  read-only
        STATUS  current
        DESCRIPTION
            "The total number of alias entries available to be allocated
             for this system."
        ::= { ctAliasConfiguration 2 }

ctAliasConfigurationTable OBJECT-TYPE
        SYNTAX  SEQUENCE OF CtAliasConfigurationEntry
        MAX-ACCESS   not-accessible
        STATUS  current
        DESCRIPTION
            "This table is used to prevent any single chatty
             port from monopolizing all of the available alias 
             buffers in the system by letting an administrator
             tune each port."
         ::= { ctAliasConfiguration 3 }

ctAliasConfigurationEntry OBJECT-TYPE
        SYNTAX  CtAliasConfigurationEntry
        MAX-ACCESS   not-accessible
        STATUS  current
        DESCRIPTION
            "Each entry contains an enable/disable control variable
             and variables showing the number of maximum allowable 
             and currently used entries."
        INDEX   { ctAliasInterface }
        ::=     { ctAliasConfigurationTable 1 }

CtAliasConfigurationEntry ::=
        SEQUENCE 
        {
            ctAliasConfigurationInterfaceTotalEntries Gauge32,
            ctAliasConfigurationInterfaceMaxEntries   Gauge32,
            ctAliasConfigurationInterfaceEnableState  EnabledStatus,
            ctAliasConfigurationNumQueueWraps         Counter32
        }

ctAliasConfigurationInterfaceTotalEntries  OBJECT-TYPE
        SYNTAX  Gauge32
        MAX-ACCESS  read-only
        STATUS  current
        DESCRIPTION
            "The total number of alias entries currently in
             use by this ctAliasInterface."
        ::= { ctAliasConfigurationEntry 1 }

ctAliasConfigurationInterfaceMaxEntries OBJECT-TYPE
        SYNTAX  Gauge32
        MAX-ACCESS  read-write
        STATUS  current
        DESCRIPTION
            "This object represents the maximum number of 
             alias entries in the ctAliasTable which were 
             created by this ctAliasInterface. When the object
             ctAliasConfigurationInterfaceTotalEntries
             equals this object, the next alias appearing 
             on this ctAliasInterface causes the oldest entry 
             created by this ctAliasInterface to be deleted. 
             The sum of this object across all ctAliasInterface 
             shall not exceed ctAliasConfigurationSystemTotalEntries. 
             If the value of this object is increased, then oldest 
             entry removal ceases until the maximum is reached 
             again. If management reduces the value of this 
             object, then, starting with the oldest, alias 
             entries are removed until the new number of 
             entries is reached."
        ::= { ctAliasConfigurationEntry 2 }

ctAliasConfigurationInterfaceEnableState  OBJECT-TYPE
        SYNTAX  EnabledStatus
        MAX-ACCESS  read-write
        STATUS  current
        DESCRIPTION
            "The enable state of the alias agent on this
             ctAliasInterface."
        DEFVAL { enabled }
        ::= { ctAliasConfigurationEntry 3 }

ctAliasConfigurationNumQueueWraps  OBJECT-TYPE
        SYNTAX  Counter32
        MAX-ACCESS  read-only
        STATUS  current
        DESCRIPTION
            "This object represents the number of times the queue for
             this ctAliasConfigurationEntry has wrapped.  Since circular
             queues are used for storing the entries, when all allocated
             entries are used, the oldest entries are reused, thus
             creating a wrap condition.  A value of zero indicates the
             queue has not wrapped, except in the case that the counter
             itself has wrapped."
        ::= { ctAliasConfigurationEntry 4 }


-- Alias Mac Address Table

ctAliasMacAddressTable OBJECT-TYPE
        SYNTAX SEQUENCE OF CtAliasMacAddressEntry
        MAX-ACCESS   not-accessible
        STATUS       current
        DESCRIPTION
            "The ctAliasMacAddressTable contains information about
             the aliases known by the agent indexed by MAC address
             and protocol.

             This table contains information that is identical to
             the ctAliasTable, but it is instanced by MAC address
             and protocol to allow management entities to search for
             a MAC address and protocol, or part of a MAC address
             and protocol, using a single SNMP GetNext request."
         ::= { ctAlias 5 }

ctAliasMacAddressEntry OBJECT-TYPE
        SYNTAX       CtAliasMacAddressEntry
        MAX-ACCESS   not-accessible
        STATUS       current
        DESCRIPTION
            "Each entry contains information pertaining to the alias
             of a node in a table indexed by MAC address, protocol
             type, protocol address, and alias ID."
        INDEX   { ctAliasMacAddress, ctAliasProtocol,
                  ctAliasAddress, ctAliasReference }
        ::= { ctAliasMacAddressTable 1 }

CtAliasMacAddressEntry ::=
        SEQUENCE 
        {
             ctAliasMacAddressInterface     InterfaceIndex,
             ctAliasMacAddressVlanID        VlanIndex,
             ctAliasMacAddressIsActive      TruthValue,
             ctAliasMacAddressAddressText   SnmpAdminString,
             ctAliasMacAddressTime          TimeTicks
        }

ctAliasMacAddressInterface OBJECT-TYPE
        SYNTAX       InterfaceIndex 
        MAX-ACCESS   read-only
        STATUS       current
        DESCRIPTION
            "The ifIndex of the interface on which this entry was 
             discovered.

             The ifIndex is an 'external value' that identifies a 
             physical component associated with the Alias entry.
             This object can be used to identify the physical
             location of the interface in the ifTable [RFC2863].  

             The possibility of ifIndex value re-assignment must be
             accommodated by a management application whenever the 
             value of sysUpTime is reset to zero.

             Since ifIndex values in different 'naming scopes' are 
             not related to one another, the interface to physical 
             component associations are relative to the same
             logical entity within the agent. For more discussion 
             of naming scopes, see the ENTITY-MIB [RFC2037]"
        ::= { ctAliasMacAddressEntry 1 }

ctAliasMacAddressVlanID OBJECT-TYPE
        SYNTAX       VlanIndex
        MAX-ACCESS   read-only
        STATUS       current
        DESCRIPTION
            "The VLAN ID contained in the header of the message
             associated with this alias.

             On agents which support this MIB but do not support
             VLANs, the value for this object MUST be (1)."
        ::= { ctAliasMacAddressEntry 2 }

ctAliasMacAddressIsActive  OBJECT-TYPE
        SYNTAX       TruthValue
        MAX-ACCESS   read-only
        STATUS       current
        DESCRIPTION
            "The status of this entry.

             A true(1) value indicates the alias is active.

             A false(2) value indicates an entry which has 
             been marked inactive by network management, using the
             ctAliasEntryStatus object in the ctAliasControlTable.  

             Entries which have been marked inactive may remain in 
             the table to allow consistent mappings between network 
             management stations until an agent needs to free 
             resources."
        ::= { ctAliasMacAddressEntry 3 }

ctAliasMacAddressAddressText OBJECT-TYPE
        SYNTAX       SnmpAdminString
        MAX-ACCESS   read-only
        STATUS       current
        DESCRIPTION
            "The address associated with this entry in a human
             readable textual format."
        ::= { ctAliasMacAddressEntry 4 }

ctAliasMacAddressTime  OBJECT-TYPE
        SYNTAX       TimeTicks
        MAX-ACCESS   read-only
        STATUS       current
        DESCRIPTION
            "The value of sysUpTime when this entry was last modified."
        ::= { ctAliasMacAddressEntry 5 }


-- Alias Protocol Address Table

ctAliasProtocolAddressTable  OBJECT-TYPE
        SYNTAX SEQUENCE OF CtAliasProtocolAddressEntry
        MAX-ACCESS   not-accessible
        STATUS       current
        DESCRIPTION
            "The ctAliasProtocolAddressTable contains information
             about the aliases known by the agent indexed by protocol
             and address.

             This table contains information that is identical to the
             ctAliasTable, but it is instanced by protocol and address
             to allow management entities to search for a protocol and
             address, or part of a protocol and address, using a
             single SNMP GetNext request."
        ::= { ctAlias 6 }

ctAliasProtocolAddressEntry OBJECT-TYPE
        SYNTAX       CtAliasProtocolAddressEntry
        MAX-ACCESS   not-accessible
        STATUS       current
        DESCRIPTION
            "Each entry contains information pertaining to the alias
             of a node in a table indexed by protocol type, protocol
             address, MAC address, and alias ID."
             INDEX   { ctAliasProtocol, ctAliasAddress,
                       ctAliasMacAddress, ctAliasReference }
        ::= { ctAliasProtocolAddressTable 1 }

CtAliasProtocolAddressEntry ::=
        SEQUENCE 
        {
             ctAliasProtocolAddressInterface     InterfaceIndex,
             ctAliasProtocolAddressVlanID        VlanIndex,
             ctAliasProtocolAddressIsActive      TruthValue,
             ctAliasProtocolAddressAddressText   SnmpAdminString,
             ctAliasProtocolAddressTime          TimeTicks
        }

ctAliasProtocolAddressInterface OBJECT-TYPE
        SYNTAX       InterfaceIndex 
        MAX-ACCESS   read-only
        STATUS       current
        DESCRIPTION
            "The ifIndex of the interface on which this entry was 
             discovered.

             The ifIndex is an 'external value' that identifies a 
             physical component associated with the Alias entry.
             This object can be used to identify the physical
             location of the interface in the ifTable [RFC2863].  

             The possibility of ifIndex value re-assignment must be
             accommodated by a management application whenever the 
             value of sysUpTime is reset to zero.

             Since ifIndex values in different 'naming scopes' are 
             not related to one another, the interface to physical 
             component associations are relative to the same
             logical entity within the agent. For more discussion 
             of naming scopes, see the ENTITY-MIB [RFC2037]"
        ::= { ctAliasProtocolAddressEntry 1 }

ctAliasProtocolAddressVlanID OBJECT-TYPE
        SYNTAX       VlanIndex
        MAX-ACCESS   read-only
        STATUS       current
        DESCRIPTION
            "The VLAN ID contained in the header of the message
             associated with this alias.

             On agents which support this MIB but do not support
             VLANs, the value for this object MUST be (1)."
        ::= { ctAliasProtocolAddressEntry 2 }

ctAliasProtocolAddressIsActive  OBJECT-TYPE
        SYNTAX       TruthValue
        MAX-ACCESS   read-only
        STATUS       current
        DESCRIPTION
            "The status of this entry.

             A true(1) value indicates the alias is active.

             A false(2) value indicates an entry which has 
             been marked inactive by network management, using the
             ctAliasEntryStatus object in the ctAliasControlTable.  

             Entries which have been marked inactive may remain in 
             the table to allow consistent mappings between network 
             management stations until an agent needs to free 
             resources."
        ::= { ctAliasProtocolAddressEntry 3 }

ctAliasProtocolAddressAddressText OBJECT-TYPE
        SYNTAX       SnmpAdminString
        MAX-ACCESS   read-only
        STATUS       current
        DESCRIPTION
            "The address associated with this entry in a human
             readable textual format."
        ::= { ctAliasProtocolAddressEntry 4 }

ctAliasProtocolAddressTime  OBJECT-TYPE
        SYNTAX       TimeTicks
        MAX-ACCESS   read-only
        STATUS       current
        DESCRIPTION
            "The value of sysUpTime when this entry was last modified."
        ::= { ctAliasProtocolAddressEntry 5 }


-- Alias Table Clear object

ctAliasEntryClearAll  OBJECT-TYPE
        SYNTAX       TruthValue
        MAX-ACCESS   read-write
        STATUS       current
        DESCRIPTION
            "This object is used to remove all of the alias entries
             from all of the tables.

             When set to true(1) all known aliases will be immediately
             removed from all of their respective tables.

             A read will always return false(2)."
        ::= { ctAlias 7 }

-- -------------------------------------------------------------
--  Conformance Information
-- -------------------------------------------------------------

ctAliasConformance OBJECT IDENTIFIER
    ::= { ctAliasMib 2 }

ctAliasGroups OBJECT IDENTIFIER 
    ::= { ctAliasConformance 1 }

ctAliasCompliances OBJECT IDENTIFIER
    ::= { ctAliasConformance 2 }

-- -------------------------------------------------------------
-- units of conformance
-- -------------------------------------------------------------

ctAliasBasicGroup OBJECT-GROUP
    OBJECTS {
                        ctAliasInterface,
                        ctAliasMacAddress,
                        ctAliasVlanID,
                        ctAliasProtocol,
                        ctAliasAddress,
                        ctAliasIsActive,
                        ctAliasAddressText
    }
    STATUS      current
    DESCRIPTION
        "A collection of objects for the discovery and mapping
         of end systems and aliases."
    ::= { ctAliasGroups 1 }

ctAliasStatsGroup OBJECT-GROUP
    OBJECTS {
                        ctAliasTableStatsTotalEntries,
                        ctAliasTableStatsActiveEntries,
                        ctAliasTableStatsPurgeTime,
                        ctAliasTableStatsState
    }
    STATUS      current
    DESCRIPTION
        "A collection of objects pertaining to discovery and mapping
         of end systems and aliases."
    ::= { ctAliasGroups 2 }


ctAliasControlGroup OBJECT-GROUP
    OBJECTS {
                        ctAliasMarkInactive
    }
    STATUS      deprecated
    DESCRIPTION
        "This group has been deprecated. See ctAliasControlGroupI."
   ::= { ctAliasGroups 3 }

ctAliasConfigurationGroup OBJECT-GROUP
    OBJECTS {
                     ctAliasConfigurationSystemAllocatedEntries,
                     ctAliasConfigurationSystemTotalEntries,
                     ctAliasConfigurationInterfaceTotalEntries,
                     ctAliasConfigurationInterfaceMaxEntries,
                     ctAliasConfigurationInterfaceEnableState 

    }
    STATUS     current
    DESCRIPTION
        "A collection of objects for configuring port buffer queues."
    ::= { ctAliasGroups 4 }

ctAliasMacAddressGroup  OBJECT-GROUP
    OBJECTS {
             ctAliasMacAddressInterface,
             ctAliasMacAddressVlanID,
             ctAliasMacAddressIsActive,
             ctAliasMacAddressAddressText,
             ctAliasMacAddressTime
    }
    STATUS     current
    DESCRIPTION
        "A collection of objects for the discovery and mapping
         of end systems and aliases."
    ::= { ctAliasGroups 5 }

ctAliasProtocolAddressGroup  OBJECT-GROUP
    OBJECTS {
             ctAliasProtocolAddressInterface,
             ctAliasProtocolAddressVlanID,
             ctAliasProtocolAddressIsActive,
             ctAliasProtocolAddressAddressText,
             ctAliasProtocolAddressTime
    }
    STATUS     current
    DESCRIPTION
        "A collection of objects for the discovery and mapping
         of end systems and aliases."
    ::= { ctAliasGroups 6 }

ctAliasControlGroupI OBJECT-GROUP
    OBJECTS {
             ctAliasEntryStatus
    }
    STATUS      current
    DESCRIPTION
        "A collection of objects which make the Aliases accessible 
         using the TimeFilter TEXTUAL CONVENTION."
    ::= { ctAliasGroups 7 }

ctAliasGroup OBJECT-GROUP
     OBJECTS {
              ctAliasEntryClearAll
     }
     STATUS    current
     DESCRIPTION
         "An object used for removing alias entries."
    ::= { ctAliasGroups 8 }

ctAliasConfigurationGroupI OBJECT-GROUP
     OBJECTS {
              ctAliasConfigurationNumQueueWraps
     }
     STATUS    current
     DESCRIPTION
         "An object to indicate queue usage."
    ::= { ctAliasGroups 9 }


-- -------------------------------------------------------------
-- compliance statements
-- -------------------------------------------------------------

ctAliasCompliance MODULE-COMPLIANCE
    STATUS  current
    DESCRIPTION
        "The compliance statement for device support of the
        Cabletron Directory Alias feature."

    MODULE
        MANDATORY-GROUPS { ctAliasBasicGroup,
                           ctAliasStatsGroup,
                           ctAliasGroup } 

-- an implementation which does not support the ctAliasControlGroup 
-- will not allow for NMS management controlled garbage collection.

       ::= { ctAliasCompliances 1 }

END