All MIBs › CTRON-VLAN-EXTENSIONS-MIB
Category: VLAN and Bridging, Vendor: Cabletron/Enterasys
Description: Extends Cabletron VLAN management with proprietary attributes for enhanced VLAN policy configuration.
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What Is CTRON-VLAN-EXTENSIONS-MIB?
CTRON-VLAN-EXTENSIONS-MIB is a Cabletron Systems enterprise-specific MIB (ctVlanExt) that extends IEEE 802.1Q VLAN bridge management with Cabletron's proprietary configuration attributes, built on the 802.1Q/D9 draft specification. It exposes the supported VLAN protocol version (ctVlanVersionNumber), whether the device allows flexible VLAN grouping (ctVlanSupportedOperationalMode, ctVlanCurrentOperationalMode -- the number of significant VLAN ID bits used to scope unicast-bridging groups), a reset-to-defaults control (ctVlanResetDefaults), default-VLAN egress stickiness behavior (ctVlanDefaultVIDStickyEgress), a per-slot bitmask of VLAN-capable ports (ctVlanSupportedPortTable), and the device's VLAN address-learning mode (ctVlanLearningMode: IVL, SVL, or combined SVL/IVL). This data helps an operator confirm which ports participate in VLAN bridging and whether VLAN grouping/learning behavior matches the intended network segmentation design. It depends on the base CTRON-MIB-NAMES OID registry and is deployed on Cabletron 802.1Q-compliant switches alongside standard bridge and VLAN MIBs; network teams can download the CTRON-VLAN-EXTENSIONS-MIB file to load it into their MIB browser.
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Supported Devices
- Cabletron Systems 802.1Q-compliant switches
Monitoring Examples
An operator reads ctVlanCurrentOperationalMode to confirm the configured VLAN-grouping granularity matches the intended segmentation policy, then checks ctVlanSupportedPortTable to verify a newly added port is included in the VLAN-capable bitmask; a port missing from that bitmask would explain why VLAN tagging isn't taking effect on it.
What Can Be Monitored
- VLAN protocol version support
- VLAN operational grouping mode (bit significance)
- VLAN-capable port bitmask per slot
- VLAN address-learning mode (IVL/SVL)
- default-VLAN egress stickiness setting
- reset-to-defaults control state
This MIB depends on
Related MIBs
Imported Objects
OIDs
| OID symbolic | OID numeric | Type | Access | Description |
|---|---|---|---|---|
| ctVlanBridgeConfig | 1.3.6.1.4.1.52.4.1.2.16.1 | |||
| INT ctVlanVersionNumber | 1.3.6.1.4.1.52.4.1.2.16.1.1 | INTEGER | read-only | Specifies the IEEE 802.1Q VLAN version number. |
| INT ctVlanSupportedOperationalMode | 1.3.6.1.4.1.52.4.1.2.16.1.2 | INTEGER | read-only | This value indicates whether the device allows for flexible VLAN configuration as specified by ctVlanCurrentOperationalMode. A value of static(1) indicates that the device does not allow for user configuration. A value of configurable(2) indicates that the device supports the functionality described in the ctVlanCurrentOperationalMode object. |
| INT ctVlanCurrentOperationalMode | 1.3.6.1.4.1.52.4.1.2.16.1.3 | INTEGER | read-write | This value indicates the number of bits in a VLAN Id that are considered significant in the forwarding decision of a packet. This allows VLANs to be grouped together into logical units. Within the scope of these VLAN groups, unicast traffic may be bridged between VLANs, but, multicast and broadcast traffic is scoped to a specific VLAN. In the following depiction M represents the number of significant bits as specified by a set of the object. An X in a box represents that the bit is considered significant based on the value of M. 11 10 9 8 7 6 5 4 3 2 1 0 +===============================================+ M=0 | | | | | | | | | | | | | +===============================================+ 11 10 9 8 7 6 5 4 3 2 1 0 +===============================================+ M=4 | | | | | | | | | X | X | X | X | +===============================================+ 11 10 9 8 7 6 5 4 3 2 1 0 +===============================================+ M=9 | | | | X | X | X | X | X | X | X | X | X | +===============================================+ Significant bits are assigned sequentially starting with bit zero and ending with bit M-1. For a set value of M, (2 ^ M) VLAN groups will be created. Each group will contain (2 ^ (12 - M)) VLAN Ids, with the exception of the first group and last group which will each have ((2 ^ (12 - M)) - 1) VLAN Ids (VLAN Ids 0 and 4095 are reserved). VLAN groups are numbered sequentially from 0 through ((2 ^ M) - 1). The VLAN Ids assigned to each group, N, are assigned sequentially starting with (N * (2 ^ (12 - M))) through ((N * (2 ^ (12 - M))) + ((2 ^ (12 - M)) - 1)), with the exception of group zero which always starts with VLAN Id 1 and group ((2 ^ M) -1) which always ends with VLAN Id 4094. The number of bits specified allows the maximum amount of flexibility in the scoping of traffic, without compromising security between VLANS. For example, a set value of 0 would create a single VLAN group with 4094 VLAN Ids. This configuration would allow all unicast traffic to be bridged between VLANS, while scoping all multicast and broadcast traffic to a specific VLAN. A set value of 12 would restrict all unicast, multicast and broadcast traffic to a specific VLAN. In this configuration no traffic would be bridged between VLANS. Setting of this object is limited to devices which support configurable(2) operational modes as specified by ctVlanSupportedOperationalMode. A set of this object for a device which only supports static(1) operational mode will fail. A read of this object for a device that only supports static(1) operational mode will always return 12. |
| INT ctVlanResetDefaults | 1.3.6.1.4.1.52.4.1.2.16.1.4 | INTEGER | read-write | A set of the value reset(2) will cause the ctVlanTriggerPortSet table to contain no entries, delete all objects from the ctVlanConfig group, and reset the ctVlanPortVID for each port to the default port VLAN Identifier. A read of this object will return current(1). A set of current(1) has no effect. |
| INT ctVlanDefaultVIDStickyEgress | 1.3.6.1.4.1.52.4.1.2.16.1.5 | INTEGER | read-write | A set of the value enable(1) will cause a port, as specified by ctVlanPortNum, to remain in the egress list for the DEFAULT VLAN (VID 1) when the port's VID, specified by ctVlanPortVID, is changed. A set of disable(2) will cause the port to be removed from the egress list of the DEFAULT VLAN when the ports VID is changed. |
| ctVlanSupportedPortTable | 1.3.6.1.4.1.52.4.1.2.16.1.6 | not-accessible | This table specifies which bridge ports on the device support VLANs. | |
| ctVlanSupportedPortEntry | 1.3.6.1.4.1.52.4.1.2.16.1.6.1 | not-accessible | Specifies the bridge ports in the ctVlanSupportedPortTable. | |
| INT ctVlanSupportedSlotNum | 1.3.6.1.4.1.52.4.1.2.16.1.6.1.1 | INTEGER | read-only | The slot number of the device that the bridge port is located on. |
| OCT ctVlanSupportedPortNum | 1.3.6.1.4.1.52.4.1.2.16.1.6.1.2 | OCTET STRING | read-only | The set of ports on the device, specified by ctVlanSupportedSlotNum, that support VLANs. Each octet within the value of this object specifies a set of eight ports, with the first octet specifying ports 1 through 8, the second octet specifying ports 9 through 16, etc. Within each octet, the most significant bit represents the lowest numbered port, and the least significant bit represents the highest numbered port. Thus, each port of the VLAN bridge is represented by a single bit within the value of this object. If that bit has a value of '1' then that port is included in the set of ports; the port is not included if its bit has a value of '0'. |
| INT ctVlanLearningMode | 1.3.6.1.4.1.52.4.1.2.16.1.7 | INTEGER | read-only | This value indicates the type of VLAN learning the device supports. A value of ivl(1) indicates the device supports Independent VLAN Learning (IVL). Configuration and operation of the Learning Process and the Filtering Database such that, for a given set of VLANs, if a given individual MAC address is learnt in one VLAN, that learnt information is not used in forwarding decisions taken for the same address relative to any other VLAN in the given set. This operational mode indicates that all unicast, multicast and broadcast traffic is scoped to a specific VLAN. A value of svl(2) indicates the device supports Shared VLAN Learning (SVL). Configuration and operation of the Learning Process and the Filtering Database such that, for a given set of VLANs, if a given individual MAC address is learnt in one VLAN, that learnt information is used in forwarding decisions taken for the same address relative to any other VLAN in the given set. In a bridge that supports SVL operation, the `given set of VLANS' is the set of all VLANS (1 - 4094). This operational mode allows all unicast traffic to be bridged between VLANS, while scoping all unknown, multicast and broadcast traffic to a specific VLAN. A value of svlivl(3) indicates the device supports both Shared and Independent VLAN learning simultaneously. This operational mode allows learnt information to be shared between those VLANS for which SVL is necessary while also allowing learnt information not to be shared between those VLANS for which IVL is necessary. All three of the aforementioned modes operate by placing VLANs in `sets'. In IVL each VLAN is mapped to a separate set while in SVL each VLAN is mapped to the same set. Accordingly, svlivl is a combination of both. Each set is realized as a separate filter database. Each filter database is uniquely identified by a Filter Database Identifier (FID). The mapping of VLANs to filter databases is defined in the ctVlanIdToFidMapping leaf of the ctVlanConfigTable. |
| ctVlanTriggerPortConfig | 1.3.6.1.4.1.52.4.1.2.16.2 | |||
| ctVlanTriggerPortSetTable | 1.3.6.1.4.1.52.4.1.2.16.2.1 | not-accessible | This table provides information pertaining to the ports participating in the GVRP triggering function. | |
| ctVlanTriggerPortEntry | 1.3.6.1.4.1.52.4.1.2.16.2.1.1 | not-accessible | Specifies the bridge ports in the ctVlanTriggerPortSet table. | |
| INT ctVlanTriggerSlotNum | 1.3.6.1.4.1.52.4.1.2.16.2.1.1.1 | INTEGER | read-only | The slot number of the device that the bridge port is located on. |
| OCT ctVlanTriggerStatus | 1.3.6.1.4.1.52.4.1.2.16.2.1.1.2 | OCTET STRING | read-write | The set of ports that will participate in GVRP trigger functions. Each octet within the value of this object specifies a set of eight ports, with the first octet specifying ports 1 through 8, the second octet specifying ports 9 through 16, etc. Within each octet, the most significant bit represents the lowest numbered port, and the least significant bit represents the highest numbered port. Thus, each port of the VLAN bridge is represented by a single bit within the value of this object. If that bit has a value of '1' then that port is included in the set of ports; the port is not included if its bit has a value of '0'. A set of '1' for a port that does not have a '1' for the corresponding bit in the ctVlanSupportedPortNum will be ignored. |
| ctVlanPortConfig | 1.3.6.1.4.1.52.4.1.2.16.3 | |||
| ctVlanPortConfigTable | 1.3.6.1.4.1.52.4.1.2.16.3.1 | not-accessible | This table provides general information about the VLAN configuration of all bridge ports on a device. | |
| ctVlanPortConfigEntry | 1.3.6.1.4.1.52.4.1.2.16.3.1.1 | not-accessible | Describes a particular VLAN port configuration entry. | |
| INT ctVlanPortSlotNum | 1.3.6.1.4.1.52.4.1.2.16.3.1.1.1 | INTEGER | read-only | The slot number of the device that the bridge port is located on. |
| INT ctVlanPortNum | 1.3.6.1.4.1.52.4.1.2.16.3.1.1.2 | INTEGER | read-only | The port number for which the information is requested. |
| INT ctVlanPortVID | 1.3.6.1.4.1.52.4.1.2.16.3.1.1.3 | INTEGER | read-write | The 12 bit Port VLAN Identifier (PVID) associated with the configured VLAN for received untagged packets on the port specified by ctVlanPortNum. The port specified by ctVlanPortNum will be added to the egress list (ctVlanEgressList) for the specified VLAN with the frame type of untagged, via ctVlanEgressUntaggedList. The port will be removed from the egress list of the previous PVID. The exception to this is the DEFAULT VLAN (VID 1) when the ctVlanDefaultVIDStickyEgress is set to a value of enable(1). Additionally the ctVlanStatus of the specified VLAN will be set to a value of enable(1). A set of value that does not exist in the ctVlanConfigTable will fail with a NO-INSTANCE error. |
| INT ctVlanPortDiscardFrame | 1.3.6.1.4.1.52.4.1.2.16.3.1.1.4 | INTEGER | read-write | A set of noDiscard(1) causes the port to submit all packets received on the port to the forwarding process, regardless, of the absence or presence of a VLAN tag in the packet. A set of discardUntagged(2) causes the port specified by ctVlanPortNum to discard all frames received that carry no VLAN classification (i.e. any untagged frames or priority tagged frames). A set of discardTagged(3) has no effect. |
| INT ctVlanPortOperationalMode | 1.3.6.1.4.1.52.4.1.2.16.3.1.1.5 | INTEGER | read-write | A set of dot1QTrunk(1) causes the port specified by ctVlanPortNum to transmit tagged frames exclusively, and ctVlanPortDiscardFrame is set to a value of discardUntagged(2). Additionally the specified port is added to the egress list of all existing VLANS, and all existing VLANS are enabled as specified by ctVlanStatus. If new VLANS are established and any port is configured as a dot1QTrunk(1) then the newly created VLAN will automatically be added to the egress list (ctVlanEgressList) for the port specified by ctVlanPortNum. A set of hybrid(2) allows the port to transmit both tagged and untagged frames. Additionally the specified port is removed from all VLANS except the the VLAN as specified by ctVlanPortVID. A set of hybrid(2) will also set ctVlanPortDiscardFrame to a value of noDiscard(1). A set of dot1dTrunk(3) causes the port specified by ctVlanPortNum to transmit untagged frames exclusively, and ctVlanPortDiscardFrame is set to a value of noDiscard(1). Additionally the specified port is added to the egress list and the untagged list of all existing VLANS, and all existing VLANS are enabled as specified by ctVlanStatus. If new VLANS are established and any port is configured as a dot1dTrunk(3) then the newly created VLAN will automatically be added to the egress list (ctVlanEgressList) and the untagged list (ctVlanEgressUntaggedList) for the port specified by ctVlanPortNum. |
| INT ctVlanPortIngressFiltering | 1.3.6.1.4.1.52.4.1.2.16.3.1.1.6 | INTEGER | read-write | A set of enable(1) causes the forwarding process to discard any frame received on the port, specified by ctVlanPortNum, that is not a member of the classified VLANs' egress list, as specified bt ctVlanEgressList. VLAN classification may be accomplished via the PVID, as specified by ctVlanPortVID, for untagged frames, or the VLAN Id specified in the VLAN tag for tagged packets. A set of disable(2) causes the port to submit all frames to the forwarding process that have not already been discarded by ctVlanPortDiscardFrame. |
| ctVlanConfig | 1.3.6.1.4.1.52.4.1.2.16.4 | |||
| INT ctVlanNumActiveEntries | 1.3.6.1.4.1.52.4.1.2.16.4.1 | INTEGER | read-only | The number of active VLAN entries for the device. |
| INT ctVlanNumConfiguredEntries | 1.3.6.1.4.1.52.4.1.2.16.4.2 | INTEGER | read-only | The number of configured VLAN entries for the device. This value includes active entries. |
| INT ctVlanMaxNumEntries | 1.3.6.1.4.1.52.4.1.2.16.4.3 | INTEGER | read-only | The maximum number of VLAN entries for the device. |
| ctVlanConfigTable | 1.3.6.1.4.1.52.4.1.2.16.4.4 | not-accessible | This table allows for the creation, deletion, and modification of specific VLANs. | |
| ctVlanConfigEntry | 1.3.6.1.4.1.52.4.1.2.16.4.4.1 | not-accessible | Allows for configuration of specific VLAN entries. | |
| INT ctVlanVID | 1.3.6.1.4.1.52.4.1.2.16.4.4.1.1 | INTEGER | read-only | The 12 bit VLAN Identifier associated with the configured VLAN. |
| STR ctVlanName | 1.3.6.1.4.1.52.4.1.2.16.4.4.1.2 | DisplayString | read-write | The ASCII name associated with the configured VLAN. A set of this object prior to creating an entry by setting ctVlanEstablish will fail with a NO-INSTANCE error. |
| INT ctVlanStatus | 1.3.6.1.4.1.52.4.1.2.16.4.4.1.3 | INTEGER | read-write | A set with the value of enable(1), enables all associated entries in ctVlanEgressPorts table for the specified VLAN. A set of disable(2), disables all ctVlanEgressPorts entries associated with the specified VLAN. On ports for which the ctVlanVID specifies the PVID, the operation causes the PVID to be set to the default PVID value. A set of this object prior to creating an entry by setting ctVlanEstablish will fail with a NO-INSTANCE error. |
| INT ctVlanEstablish | 1.3.6.1.4.1.52.4.1.2.16.4.4.1.4 | INTEGER | read-write | A set of the value create(1), causes an entry to be created in the ctVlanConfigTable as specified by the instancing information of ctVlanVID. Additionally, an entry is created in the ctVlanEgressPortsTable for the specified VLAN. A set of delete(2) causes the specified entry to be removed from both tables. A read of this object will always return create(1). |
| INT ctVlanIdToFidMapping | 1.3.6.1.4.1.52.4.1.2.16.4.4.1.5 | INTEGER | read-write | The 12 bit Filter Database Identifier (FID) associated with the configured VLAN as specified by ctVlanVID. For devices operating in Independent VLAN Learning (IVL) mode, as specified by a value of ivl(1) for ctVlanLearningMode, each VLAN will be mapped to a FID value equal to the VLAN Id specified by ctVlanId. For devices operating in Shared VLAN Learning (SVL) mode, as specified by a value of svl(2) for ctVlanLearningMode, all VLANs will be to the same FID (1). On a device operating in SVL mode, sets to this object will have no effect. For devices operating in Shared and Independent VLAN Learning (SIVL) mode, as specified by a value of svlivl(3) for ctVlanLearningMode, one or more VLANs can be mapped to each FID. Each VLAN can only be uniquely mapped to one FID. When more than one VLAN is mapped to a single FID they will operate together under the SVL mode of operation. When a single VLAN is mapped to a FID it will operate under the IVL mode of operation. The default value for this object, while the device is svlivl(3) mode, will be equal to the VLAN Id specified by ctVlanId. |
| INT ctVlanType | 1.3.6.1.4.1.52.4.1.2.16.4.4.1.6 | INTEGER | read-only | This object indicates the type for this entry. A value of other(1) indicates that this entry is currently in use but the conditions under which it will remain so differ from the following values. A value of static(2) indicates that this entry has been statically configured by management, is currently in use and will remain so after the next reset of the device. A value of dynamicGvrp(3) indicates that this entry is currently in use and will remain so until removed by GVRP. There is no static entry for this VLAN and it will be removed when the last port leaves the VLAN. |
| ctVlanEgressPortsTable | 1.3.6.1.4.1.52.4.1.2.16.4.5 | not-accessible | This table provides information pertaining to the egress ports for a particular VLAN. | |
| ctVlanEgressPortEntry | 1.3.6.1.4.1.52.4.1.2.16.4.5.1 | not-accessible | Specifies the egress ports and frame types per port for the specified VLAN. | |
| INT ctVlanEgressPortSlotNum | 1.3.6.1.4.1.52.4.1.2.16.4.5.1.1 | INTEGER | read-only | The slot number of the device that the VLAN is configured on. |
| INT ctVlanEgressVID | 1.3.6.1.4.1.52.4.1.2.16.4.5.1.2 | INTEGER | read-only | The 12 bit VLAN Identifier associated with the configured VLAN. |
| OCT ctVlanEgressList | 1.3.6.1.4.1.52.4.1.2.16.4.5.1.3 | OCTET STRING | read-write | The set of ports to which traffic destined for the VLAN specified by ctVlanEgressVID on the device specified by ctVlanEgressPortSlotNum may be transmitted. Each octet within the value of this object specifies a set of eight ports, with the first octet specifying ports 1 through 8, the second octet specifying ports 9 through 16, etc. Within each octet, the most significant bit represents the lowest numbered port, and the least significant bit represents the highest numbered port. Thus, each port of the VLAN bridge is represented by a single bit within the value of this object. If that bit has a value of '1' then that port is included in the set of ports; the port is not included if its bit has a value of '0'. A set of '1' for a port that does not have a '1' for the corresponding bit in the ctVlanSupportedPortNum will be ignored. |
| OCT ctVlanEgressUntaggedList | 1.3.6.1.4.1.52.4.1.2.16.4.5.1.4 | OCTET STRING | read-write | The set of ports to which traffic destined for the VLAN specified by ctVlanEgressVID on the device specified by ctVlanEgressPortSlotNum should be untagged. Each octet within the value of this object specifies a set of eight ports, with the first octet specifying ports 1 through 8, the second octet specifying ports 9 through 16, etc. Within each octet, the most significant bit represents the lowest numbered port, and the least significant bit represents the highest numbered port. Thus, each port of the VLAN bridge is represented by a single bit within the value of this object. If that bit has a value of '1' then that port is included in the set of ports; the port is not included if its bit has a value of '0'. All egress ports, as specified by ctVlanEgressList, that do not have a value of '1' for the corresponding bit in this object will be tagged. A set of '1' for a port that does not have a '1' for the corresponding bit in the ctVlanEgressList will be ignored. |
| ctVlanProtocolAssign | 1.3.6.1.4.1.52.4.1.2.16.5 | |||
| INT ctVlanProtocolStatus | 1.3.6.1.4.1.52.4.1.2.16.5.1 | INTEGER | read-write | This object allows the Protocol/Vlan feature to be disabled. |
| INT ctMaxNumVlanProtoEntries | 1.3.6.1.4.1.52.4.1.2.16.5.2 | INTEGER | read-only | The maximum number of entries allowed for the ctVlanProtoAssignTable table. |
| ctVlanProtoAssignTable | 1.3.6.1.4.1.52.4.1.2.16.5.3 | not-accessible | This table provides a mapping of protocol or Ether types to VLAN Ids for 'untagged' packets. | |
| ctVlanProtoAssignEntry | 1.3.6.1.4.1.52.4.1.2.16.5.3.1 | not-accessible | Describes a particular protocol VLAN ID configuration entry. | |
| INT ctVlanProtoEtherType | 1.3.6.1.4.1.52.4.1.2.16.5.3.1.1 | INTEGER | read-only | This object returns the protocol or Ether type that is mapped to the VLAN specified in it's instancing. This object takes the value of any valid Ether type(0x0600..0xFFFF). In addition to the previously mentioned range of Ether types, the following values hold special meaning: Value Description DSAP/SSAP/Control ------- --------------- ---------------------- 0x100 LLC_IPX1 0xE0E003 0x101 LLC_IPX2 0xFFFF 0x102 LLC_NETBIOS 0xF0F003 0x103 LLC_BANYAN 0xBCBC03 |
| INT ctVlanProtoEstablish | 1.3.6.1.4.1.52.4.1.2.16.5.3.1.2 | INTEGER | read-write | A set of the value create(1), causes an entry to be added to the ctVlanProtoAssignTable as specified by the instancing information of ctVlanVID and ctVlanProtoEtherType. This has the result of mapping the specified protocol or Ether type to a VLAN for all received untagged traffic on the ports specified by ctVlanProtoPortList. A set of the value delete(2), causes the specified entry information to be removed from the table. A read of this object will always return create(1). |
| OCT ctVlanProtoPortList | 1.3.6.1.4.1.52.4.1.2.16.5.3.1.3 | OCTET STRING | read-write | The set of ports on the device, specified by ctVlanVID and ctVlanProtoEtherType, that will classify received 'untagged' packets of ctVlanProtoEtherType type, to the VLAN specified by ctVlanVID. Each octet within the value of this object specifies a set of eight ports, with the first octet specifying ports 1 through 8, the second octet specifying ports 9 through 16, etc. Within each octet, the most significant bit represents the lowest numbered port, and the least significant bit represents the highest numbered port. Thus, each port on this device is represented by a single bit within the value of this object. If that bit has a value of '1' then that port is included in the set of ports; the port is not included if its bit has a value of '0'. A set of this object prior to creating an entry by setting ctVlanProtoEstablish will fail with a NO-INSTANCE error. This object will have an initial value '0' for each port that is represented. |
RFC description
802.1Q VLAN extensions for Cabletron switches with bridging configuration and port management.
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