CISCO-VIRTUAL-INTERFACE-MIB

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Category: Cisco Devices, Network Interfaces

Description: Manages virtual interface creation, binding, and operational state for logical network interfaces on Cisco devices.

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What Is CISCO-VIRTUAL-INTERFACE-MIB?

This MIB manages Cisco Virtual Interfaces, logical interfaces that can be dynamically created and bound to a physical or another logical interface for services such as VPDN or tunneling. It exposes configuration objects for virtual interface groups, which group and bind sets of VIFs, plus operational status data including creation time, operational state, and failure cause for each VIF group. This makes it useful for monitoring software/logical-interface status, as administrators check virtual interface group operational state to see whether it is up, and failure cause to diagnose why a virtual interface failed to establish, alongside creation time to track session/interface age. It relates to and extends the standard Interfaces MIB (IF-MIB), since each virtual interface typically has a corresponding ifEntry. It is typically deployed on Cisco access/aggregation routers supporting dial, VPDN, or virtual-access interface features, where CISCO-VIRTUAL-INTERFACE-MIB SNMP monitoring tracks virtual interface group state and failure cause.

IPNetwork Monitor allows you to monitor SNMP objects defined in CISCO-VIRTUAL-INTERFACE-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 access routers
Cisco aggregation routers with VPDN/dial support

Monitoring Examples

An administrator would poll cvifGroupTable / cvifGroupEntry, checking cvifGroupOperState and cvifGroupFailureCause for a given cvifGroupIndex to determine why a virtual interface group failed to bind (cvifGroupBindingIfIndex) to its underlying physical interface. The cvifGroupMemberList shows which member interfaces belong to the group, and cvifGroupCreationTime helps correlate a failure event with a specific provisioning attempt. cvifGroupsSupported would first be checked to confirm the platform supports virtual interface groups at all.

What Can Be Monitored

virtual interface group operational state
virtual interface failure cause
group creation time
member interface list
binding interface index

Imported Objects

From CISCO-SMI

ciscoMgmt

OBJECT-IDENTITY

From CISCO-ST-TC

PortMemberList

From IANAifType-MIB

IANAifType

From IF-MIB

InterfaceIndex
InterfaceIndexOrZero

From RFC-1212

OBJECT-TYPE

From RFC1155-SMI

Gauge

From SNMP-FRAMEWORK-MIB

SnmpAdminString

From SNMPv2-TC-v1

RowStatus
TimeStamp
TruthValue

OIDs

OID symbolic	OID numeric	Type	Access	Description
ciscoVirtualInterfaceMIB	1.3.6.1.4.1.9.9.648
ciscoVirtualInterfaceMIBObjects	1.3.6.1.4.1.9.9.648.1
cvifGlobals	1.3.6.1.4.1.9.9.648.1.1
T/F cvifGroupsSupported	1.3.6.1.4.1.9.9.648.1.1.1	TruthValue	read-write	This is a boolean that indicates whether Virtual Interface Groups are supported (and enabled). Note that many agents are unlikely to support write-access for this object. If there are entries in the cvifGroupTable when this value is being set to false, the set will fail.
cvifConfig	1.3.6.1.4.1.9.9.648.1.2
cvifGroupTable	1.3.6.1.4.1.9.9.648.1.2.1		not-accessible	This table facilitates the creation and deletion of a Virtual Interface Group. Entries in this table exist only if cvifGroupsSupported is 'true'. A Virtual Interface Group is a collection of virtual interfaces on an adapter in a server. The virtual interfaces within a Virtual Interface Group do not need to all have the same ifType.
cvifGroupEntry	1.3.6.1.4.1.9.9.648.1.2.1.1		not-accessible	There is one entry in this table for each created Virtual Interface Group.
GAU cvifGroupIndex	1.3.6.1.4.1.9.9.648.1.2.1.1.1	Gauge	not-accessible	An index that uniquely identifies an entry in the cvifGroupTable table.
NUM cvifGroupIfIndex	1.3.6.1.4.1.9.9.648.1.2.1.1.2	InterfaceIndex	read-only	The ifIndex of this Virtual Interface Group.
NUM cvifGroupBindingIfIndex	1.3.6.1.4.1.9.9.648.1.2.1.1.3	InterfaceIndexOrZero	read-write	The ifIndex of the physical interface or another virtual interface like an Etherchannel bound to this Virtual Interface Group. The binding can happen at Virtual Interface Group creation time or at a later time. In order for Virtual Interface Group to become operational, binding to a physical interface or a virtual interface like an Etherchannel is mandatory. When the virtual interface group is not bound to an interface, this field has a value of zero.
POR cvifGroupMemberList	1.3.6.1.4.1.9.9.648.1.2.1.1.4	PortMemberList	read-only	The list of Virtual interfaces in the Virtual Interface Group.
TIM cvifGroupCreationTime	1.3.6.1.4.1.9.9.648.1.2.1.1.5	TimeStamp	read-only	The timestamp of this entry's creation time.
STR cvifGroupFailureCause	1.3.6.1.4.1.9.9.648.1.2.1.1.6	SnmpAdminString	read-only	The cause of failure for the last bind operation. This object will be zero length if and only if the bind is successful. After a successful bind operation, the value of cvifGroupOperState is set to 'up'.
INT cvifGroupOperState	1.3.6.1.4.1.9.9.648.1.2.1.1.7	INTEGER	read-only	Operational state of the Virtual Interface Group.
ROW cvifGroupRowStatus	1.3.6.1.4.1.9.9.648.1.2.1.1.8	RowStatus	read-write	The status of this conceptual row. The RowStatus becomes active on successful creation of a Virtual Interface Group. It is not necessary for the cvifGroupBindingIfIndex to be set at the time of creation.
cvifTable	1.3.6.1.4.1.9.9.648.1.2.2		not-accessible	This table facilitates the creation and deletion of virtual interfaces. Virtual interfaces may or may not be associated with a Virtual Interface Group according to the value of cvifGroupsSupported. In order for a virtual interface to become operational, it must be directly bound to a physical interface or another virtual interface like an EtherChannel or indirectly bound via its Virtual Interface Group. At creation time, the cvifType must be identified.
cvifEntry	1.3.6.1.4.1.9.9.648.1.2.2.1		not-accessible	There is one entry in this table for each created virtual Interface
GAU cvifIndex	1.3.6.1.4.1.9.9.648.1.2.2.1.1	Gauge	not-accessible	When Virtual Interface Groups (as indicated by the cvifGroupsSupported MIB object) are supported, this is the Virtual Interface Group index. Otherwise, this index identifies the virtual interface.
IAN cvifType	1.3.6.1.4.1.9.9.648.1.2.2.1.2	IANAifType	not-accessible	The type of virtual interface desired by the network manager. If and when a row is created in this table by using a SetRequest to cvifRowStatus, the corresponding ifTable row will be created by the agent with its ifType as specified by this object. Note that agents are unlikely to support more than a few values for this object, e.g., 'ethernetCsmacd(6)' and 'fibreChannel(56)'.
NUM cvifIfIndex	1.3.6.1.4.1.9.9.648.1.2.2.1.3	InterfaceIndex	read-only	The ifIndex of this virtual interface.
TIM cvifCreationTime	1.3.6.1.4.1.9.9.648.1.2.2.1.4	TimeStamp	read-only	The timestamp of this entry's creation time.
NUM cvifBindingIfIndex	1.3.6.1.4.1.9.9.648.1.2.2.1.5	InterfaceIndexOrZero	read-write	This field is supported only when Virtual Interface Groups are not supported, as indicated by the cvifGroupsSupported MIB object. It identifies the ifIndex of the interface that this virtual interface is bound to. In order for a virtual interface to become operational, in the absence of Virtual Interface Groups, binding to an interface is mandatory. When the virtual interface is not bound to an interface, this field has a value of zero.
STR cvifFailureCause	1.3.6.1.4.1.9.9.648.1.2.2.1.6	SnmpAdminString	read-only	This field is supported only when Virtual Interface Groups are not supported, as indicated by the cvifGroupsSupported MIB object. The cause of failure for the last bind operation. This object will be zero length if and only if the bind is successful.
ROW cvifRowStatus	1.3.6.1.4.1.9.9.648.1.2.2.1.7	RowStatus	read-write	The status of this conceptual row. The RowStatus becomes active on successful creation of a virtual interface. If Virtual Interface Groups are not supported, as indicated by the cvifGroupsSupported MIB object, the virtual interface must be bound to a physical interface or another virtual interface like an Etherchannel before it can become operational.
ciscoVirtualInterfaceMIBConformance	1.3.6.1.4.1.9.9.648.2
cvifMIBCompliances	1.3.6.1.4.1.9.9.648.2.1
cvifGroupMIBCompliance	1.3.6.1.4.1.9.9.648.2.1.1
cvifMIBCompliance	1.3.6.1.4.1.9.9.648.2.1.2
cvifMIBGroups	1.3.6.1.4.1.9.9.648.2.2
cvifGroupConformanceObjects	1.3.6.1.4.1.9.9.648.2.2.1
cvifCommonConformanceObjects	1.3.6.1.4.1.9.9.648.2.2.2
cvifPhysicalConformanceObjects	1.3.6.1.4.1.9.9.648.2.2.3

RFC description

Cisco virtual interface creation and management for EtherChannel and virtual interface groups with binding to physical or virtual ports.

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Download CISCO-VIRTUAL-INTERFACE-MIB

What Is CISCO-VIRTUAL-INTERFACE-MIB?

Supported Devices

Monitoring Examples

What Can Be Monitored

This MIB depends on

Related MIBs

RFC description