CISCO-QINQ-VLAN-MIB

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Organization: Cisco Systems, Inc.

Last Updated: 2004-11-29

Category: Cisco Devices, VLAN and Bridging

Description: Manages Q-in-Q double VLAN tagging tunnel configuration and statistics on Cisco carrier Ethernet switches.

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What Is CISCO-QINQ-VLAN-MIB?

CISCO-QINQ-VLAN-MIB is a Cisco-specific module for configuring and monitoring 802.1Q-in-Q double VLAN tagging, used on carrier and metro Ethernet switches to let service providers tunnel customer VLANs inside a single provider VLAN tag. It exposes configuration data such as QinQ termination and translation table entries mapping customer (CE) VLAN IDs to provider (PE) VLAN IDs, along with encapsulation settings and row status for each mapping. While primarily a configuration MIB, its row-status objects let operators confirm that a given QinQ tunnel or translation mapping is actively provisioned and operational rather than stale or misconfigured, reflecting the software state of the VLAN forwarding tables. This MIB is built directly on the IEEE 802.1Q VLAN tagging standard, extending it with Cisco's QinQ termination and translation model. It is typically deployed on Cisco carrier-grade switches at service-provider network edges where multiple customer VLANs must be tunneled transparently across a shared metro network. Network engineers evaluating or troubleshooting this functionality can download the CISCO-QINQ-VLAN-MIB file directly to load it into their MIB browser.

IPNetwork Monitor allows you to monitor SNMP objects defined in CISCO-QINQ-VLAN-MIB. Use the built-in SNMP Monitoring Browser to explore available variables, view their current values and descriptions, and select the objects you want to monitor. You can then create SNMP monitors, configure thresholds, and receive alerts when monitored values change.

Supported Devices

Cisco carrier Ethernet / metro Ethernet switches

Monitoring Examples

An operator would inspect cqvTerminationTable/cqvTerminationEntry rows to see the mapping of cqvTerminationPeVlanId to cqvTerminationCeVlanId along with cqvTerminationPeEncap and cqvTerminationRowStatus, confirming a customer's inner VLAN is correctly terminated into the provider's outer VLAN. Polling cqvTranslationTable for cqvTranslationInternalPeVlanId versus cqvTranslationTrunkPeVlanId reveals whether a VLAN ID is being translated correctly across a trunk boundary. If cqvTerminationRowStatus for an expected mapping shows notInService, that signals a broken or unprovisioned QinQ tunnel for that customer.

What Can Be Monitored

PE VLAN ID
CE VLAN ID
QinQ encapsulation type
termination row status
VLAN translation mappings

Imported Objects

From CISCO-SMI

ciscoMgmt

OBJECT-IDENTITY

From IF-MIB

ifIndex

OBJECT-TYPE

From Q-BRIDGE-MIB

VlanId

From SNMPv2-CONF

MODULE-COMPLIANCE
OBJECT-GROUP

From SNMPv2-SMI

MODULE-IDENTITY
OBJECT-TYPE
Unsigned32

From SNMPv2-TC

RowStatus
TEXTUAL-CONVENTION

OIDs

OID symbolic	OID numeric	Type	Access	Description
ciscoQinqVlanMIB	1.3.6.1.4.1.9.9.445			This MIB defines configuration and monitoring capabilities relating to 802.1QinQ interfaces. QinQ interfaces are capable of terminating QinQ traffic and translating QinQ tags. IEEE 802.1Q VLAN specification provides for an option to tag Ethernet frames with two VLAN tags: - An inner tag that specifies the customer's VLAN ID. This tag is called the 'CE VLAN'. - An outer tag that specifies the service provider's VLAN ID. This tag is called the 'metro tag', or the 'PE VLAN'. The combination of inner and outer VLAN tags is used to uniquely identify a particular customer's service flow.
ciscoQinqVlanMIBNotifs	1.3.6.1.4.1.9.9.445.0
ciscoQinqVlanMIBObjects	1.3.6.1.4.1.9.9.445.1
cqvTermination	1.3.6.1.4.1.9.9.445.1.1
cqvTerminationTable	1.3.6.1.4.1.9.9.445.1.1.1		not-accessible	This table contains attributes pertaining to QinQ terminated interfaces. The ifIndex in the INDEX clause identifies the interface that terminates QinQ traffic. A management application can create a conceptual row in this table by setting the cqvTerminationRowStatus to 'createAndWait' or 'createAndGo'. A conceptual row in this table cannot be modified while cqvTerminationRowStatus is set to 'active'.
cqvTerminationEntry	1.3.6.1.4.1.9.9.445.1.1.1.1		not-accessible	An entry in this table defines a QinQ terminated interface.
VLA cqvTerminationPeVlanId	1.3.6.1.4.1.9.9.445.1.1.1.1.1	VlanId	not-accessible	The VLAN ID of the outer tag of a QinQ frame.
VLA cqvTerminationCeVlanId	1.3.6.1.4.1.9.9.445.1.1.1.1.2	VlanId	not-accessible	The VLAN ID of the inner tag of a QinQ frame.
CQV cqvTerminationPeEncap	1.3.6.1.4.1.9.9.445.1.1.1.1.3	CqvEncapsulationType	read-create	The encapsulation type of the PE VLAN (cqvTerminationPeVlanId) of a QinQ frame.
ROW cqvTerminationRowStatus	1.3.6.1.4.1.9.9.445.1.1.1.1.4	RowStatus	read-create	This object facilitates the creation, modification, or deletion of a conceptual row in this table.
cqvTranslation	1.3.6.1.4.1.9.9.445.1.2
cqvTranslationTable	1.3.6.1.4.1.9.9.445.1.2.1		not-accessible	This table defines the translations performed on QinQ capable interfaces. The ifIndex in the INDEX clause identifies the QinQ interface. A QinQ interface performs the following translations: - Double Tagged to Single Tagged - the inner and outer tags of the frames internal to the switch are replaced with a single trunk VLAN tag when the outgoing frame is transmitted. - Double Tagged to Double Tagged - the outer tag of the frames internal to the switch are replaced with an outer trunk VLAN tag when the outgoing frame is transmitted. The inner tag remains unchanged in the transmitted frame. The following picture illustrates QinQ translations. Switch +--------------------------------+ \| \| \| +---------------+ +-------\| +------------------+ \| \| Double Tagged \| \| QinQ \| \| Single or Double \| \| \| Frames \| --> \| Intf \| --> \| Tagged Frames \| \| +---------------+ +-------\| +------------------+ \| \| +--------------------------------+ Also, the QinQ interface sets the IEEE 802.1P prioritization bits (P bits) in the outgoing frames by copying the P bits either from the internal frame's outer or inner VLAN tag. A management application can create a conceptual row in this table by setting the cqvTranslationRowStatus to 'createAndWait' or 'createAndGo'. A conceptual row in this table cannot be modified while cqvTranslationRowStatus is set to 'active'.
cqvTranslationEntry	1.3.6.1.4.1.9.9.445.1.2.1.1		not-accessible	An entry in this table contains translation information for a particular QinQ interface.
CQV cqvTranslationInternalPeVlanId	1.3.6.1.4.1.9.9.445.1.2.1.1.1	CqvVlanIdOrZero	not-accessible	The QinQ outer VLAN ID of an internal double tagged frame. This object will have the value of zero as described in the cqvTranslationType object.
CQV cqvTranslationInternalCeVlanId	1.3.6.1.4.1.9.9.445.1.2.1.1.2	CqvVlanIdOrZero	not-accessible	The QinQ inner VLAN ID of an internal double tagged frame. This object will have the value of zero as described in the cqvTranslationType object.
CQV cqvTranslationTrunkPeVlanId	1.3.6.1.4.1.9.9.445.1.2.1.1.3	CqvVlanIdOrZero	read-create	The QinQ outer VLAN ID of a trunk VLAN frame. This object will have the value of zero as described in the cqvTranslationType object.
CQV cqvTranslationTrunkCeVlanId	1.3.6.1.4.1.9.9.445.1.2.1.1.4	CqvVlanIdOrZero	read-create	The QinQ inner VLAN ID of a trunk VLAN frame. This object will have the value of zero as described in the cqvTranslationType object.
INT cqvTranslationType	1.3.6.1.4.1.9.9.445.1.2.1.1.5	INTEGER	read-create	The QinQ translation type being performed on the interface. 'doubleToSingle' - Double tagged to single tagged traffic. The value of cqvTranslationTrunkPeVlanId will be zero. This indicates that the PE VLAN tag will be absent in the trunk interface. 'doubleToDouble' - Double tagged to double tagged traffic. The value of the internal PE and CE, and the trunk PE and CE VLAN IDs are non-zero. 'doubleToDoubleOutOfRange' - Double tagged to double tagged traffic that does not have a defined translation. The value of cqvTranslationInternalCeVlanId will be zero. This indicates that the CE VLAN tag is being used as a wildcard.
INT cqvTranslationCosPBits	1.3.6.1.4.1.9.9.445.1.2.1.1.6	INTEGER	read-create	This object indicates how the IEEE 802.1P bits (P bits) in the IEEE 802.1Q header of the trunk VLAN are to be set. The P bits in the trunk VLAN can be set by copying the P bits of the outer PE tag or the inner CE tag. 'copyFromOuterTag' - Copy the P bits from the outer PE tag. 'copyFromInnerTag' - Copy the P bits from the inner CE tag.
ROW cqvTranslationRowStatus	1.3.6.1.4.1.9.9.445.1.2.1.1.7	RowStatus	read-create	This object facilitates the creation, modification, or deletion of a conceptual row in this table.
ciscoQinqVlanMIBConform	1.3.6.1.4.1.9.9.445.2
ciscoQinqVlanMIBCompliances	1.3.6.1.4.1.9.9.445.2.1
ciscoQinQVlanMIBCompliance	1.3.6.1.4.1.9.9.445.2.1.1			The compliance statement for entities which implement the Cisco QinQ MIB.
ciscoQinqVlanMIBGroups	1.3.6.1.4.1.9.9.445.2.2
ciscoQinqVlanTerminationGroup	1.3.6.1.4.1.9.9.445.2.2.1			Objects for providing configuration for QinQ termination.
ciscoQinqVlanTranslationGroup	1.3.6.1.4.1.9.9.445.2.2.2			Objects for providing configuration for QinQ translation.

RFC description

SNMP MIB for managing Cisco's IEEE 802.1Q-in-Q (QinQ) VLAN tag stacking implementation, enabling service providers to encapsulate customer VLAN traffic with provider VLAN tags for multi-customer support.

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Download CISCO-QINQ-VLAN-MIB

What Is CISCO-QINQ-VLAN-MIB?

Supported Devices

Monitoring Examples

What Can Be Monitored

This MIB depends on

Related MIBs

RFC description