CTRON Alias MIB

The following tables, groups, and variables are supported in this MIB.

Table/Group Supported Variables Comments
ctAliasTable

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.

Access = not-accessible

CtAliasEntry

Each entry contains information pertaining to the alias of a node.

Access = not-accessible

ctAliasTimeFilter

The value of sysUpTime when this entry was last modified.

Access = not-accessible

ctAliasReference

An integer ID assigned by the agent. The value of this object is equal to an existing ctAliasID.

Access = not-accessible

ctAliasInterface

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].

Access = read-only

ctAliasMacAddress

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."

Access = read-only

ctAliasVlanID

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).

Access = read-only

ctAliasProtocol

The address type of this alias address.

Access = read-only

ctAliasAddress

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.

Access = read-only

ctAliasIsActive

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.

Access = read-only

ctAliasAddressText

The address associated with this entry in a human readable textual format.

Access = read-only

ctAliasControlTable

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.

Access = not-accessible

CtAliasControlEntry

Each entry contains a unique identifier of an Alias entry and a control object to mark the entry as 'marked for deletion'.

Access = not-accessible

ctAliasID

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.

Access = not-accessible

ctAliasMarkInactive

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.

Access = read/write

ctAliasEntryStatus

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.

Access = read/write

ctAliasTableStatsTotalEntries

The total number of entries in the ctAliasControlTable.

Access = read-only

ctAliasTableStatsActiveEntries

The total number of active entries in the ctAliasControlTable.

Access = read-only

ctAliasTableStatsPurgeTime

System time of the most recent purge.

Access = read-only

ctAliasTableStatsState

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.

Access = read-only

ctAliasConfigurationSystemAllocatedEntries

The total number of alias entries allocated.

Access = read-only

ctAliasConfigurationSystemTotalEntries

The total number of alias entries available to be allocated for this system.

Access = read-only

ctAliasConfigurationTable

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.

Access = not-accessible

ctAliasConfigurationEntry

Each entry contains an enable/disable control variable and variables showing the number of maximum allowable and currently used entries.

Access = not-accessible

ctAliasConfigurationInterfaceTotalEntries

The total number of alias entries currently in use by this ctAliasInterface.

Access = read-only

ctAliasConfigurationInterfaceMaxEntries

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.

Access = read/write

ctAliasConfigurationInterfaceEnableState

The enable state of the alias agent on this ctAliasInterface.

Access = read/write

ctAliasConfigurationNumQueueWraps

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.

Access = read-only

ctAliasConfigurationProtocolEnableState

A bit field of the protocol types where a set indicates the detection of that protocol is enabled. A bit position with a cleared bit indicates detection of that protocol is not enabled.

Access = read-only

ctAliasMacAddressInterface 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]

Access = read-only

ctAliasMacAddressVlanID

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).

Access = read-only

ctAliasMacAddressIsActive

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.

Access = read-only

ctAliasMacAddressAddressText

The address associated with this entry in a human readable textual format.

Access = read-only

ctAliasMacAddressTime

The value of sysUpTime when this entry was last modified.

Access = read-only

ctAliasProtocolAddressTable

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.

Access = not-accessible

ctAliasProtocolAddressEntry

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.

Access = not-accessible

ctAliasProtocolAddressInterface

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]

Access = read-only

ctAliasProtocolAddressVlanID

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).

Access = read-only

ctAliasProtocolAddressIsActive

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.

Access = read-only

ctAliasProtocolAddressAddressText

The address associated with this entry in a human readable textual format.

Access = read-only

ctAliasProtocolAddressTime

The value of sysUpTime when this entry was last modified.

Access = read-only

ctAliasEntryClearAll

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).

Access = read/write

ctAliasInterfaceTable

The ctAliasInterfaceTable contains information about the aliases known by the agent indexed by interface address and alias ID. This table contains information that is identical to the ctAliasTable, but it is instanced by interface address and alias ID to allow management entities to search for an interface address, using a single SNMP GetNext request.

Access = not-accessible

ctAliasInterfaceEntry

Each entry contains information pertaining to the alias of a node in a table indexed by interface address and alias ID.

Access = not-accessible

ctAliasInterfaceMacAddress

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.

Access = read-only

ctAliasInterfaceAddress

The address associated with this entry. The exact format of this object will depend upon the protocol type in ctAliasInterfaceProtocol. The value returned for this object MUST be in a non-textual format.

Access = read-only

ctAliasInterfaceVlanID

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).

Access = read-only

ctAliasInterfaceIsActive

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.

Access = read-only

ctAliasInterfaceAddressText

The address associated with this entry in a human readable textual format.

Access = read-only

ctAliasInterfaceTime

The value of sysUpTime when this entry was last modified.

Access = read-only

ctAliasMacAddressTable

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.

Access = not-accessible

ctAliasMacAddressEntry

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.

Access = not-accessible

ctAliasBasicGroup A collection of objects for the discovery and mapping of end systems and aliases.
ctAliasStatsGroup A collection of objects pertaining to discovery and mapping of end systems and aliases.
ctAliasControlGroup This group has been deprecated. See ctAliasControlGroupI.
ctAliasConfigurationGroup A collection of objects for configuring port buffer queues.
ctAliasMacAddressGroup A collection of objects for the discovery and mapping of end systems and aliases.
ctAliasProtocolAddressGroup A collection of objects for the discovery and mapping of end systems and aliases.
ctAliasControlGroupI A collection of objects which make the Aliases accessible using the TimeFilter TEXTUAL CONVENTION.
ctAliasGroup An object used for removing alias entries.
ctAliasConfigurationGroupI An object to indicate queue usage.
ctAliasConfigurationGroup2 A collection of objects for configuring port buffer queues.
ctAliasInterfaceGroup A collection of objects for the discovery and mapping of end systems and aliases.