CISCO-VTP-MIB

MIB Reference — IPNetwork Monitor · Updated September 14, 2026

All MIBsCISCO-VTP-MIB

Organization: Cisco Systems, Inc.

Last Updated: 2010-05-12

Category: Cisco Devices, VLAN and Bridging

Description: Manages the VLAN Trunking Protocol (VTP) and VLAN configuration on Cisco switches.

IPNetwork Monitor uses several OIDs from this MIB in network discovery and polling the applicable devices. Start monitoring CISCO-VTP-MIB with a free 30-day trial of IPNetwork Monitor.

What Is CISCO-VTP-MIB?

CISCO-VTP-MIB is a Cisco Systems MIB for entities implementing the VLAN Trunking Protocol (VTP) and VLAN management on Cisco switches. It exposes VTP protocol configuration (version, maximum VLAN storage, notification enablement) along with a management domain table describing each VTP domain's name, operating mode, configuration revision number, and last-updater identity. Its monitoring value is largely software/configuration status: tracking VTP domain revision numbers to detect unauthorized or unexpected VLAN database changes, confirming vtpStatus reflects the intended VTP mode (server/client/transparent), and using notification objects (vtpVlanCreatedNotifEnabled, vtpVlanDeletedNotifEnabled) to confirm alerting is active when VLANs are added or removed. It is a Cisco enterprise extension of the IEEE/Cisco VTP protocol and typically coexists with CISCO-VLAN-MEMBERSHIP-MIB and standard bridge MIBs on the same switch; many monitoring tools reference the cisco-vtp-mib module by name when building VTP-specific polling templates for Catalyst switches. It is deployed on Cisco Catalyst switches in enterprise and campus LAN environments using VTP for centralized VLAN database distribution.

IPNetwork Monitor allows you to monitor SNMP objects defined in CISCO-VTP-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 Catalyst 9300X (2021) — current flagship stackable access switch family, still receiving active IOS XE releases (17.18.x) as of 2025 and supporting VTP/VLAN management

Monitoring Examples

An admin would poll managementDomainConfigRevNumber in the managementDomainTable to detect unexpected VLAN database changes—a revision number jump not matching a planned change often signals a rogue or misconfigured VTP server overwriting the domain's VLAN list. managementDomainLastUpdater identifies which device last pushed a VTP update, useful for tracing the source of an unwanted change, while managementDomainLocalMode confirms whether the switch is acting as server, client, or transparent. vtpVersion and vtpMaxVlanStorage would be checked to confirm protocol compatibility and VLAN capacity limits across the VTP domain.

What Can Be Monitored

  • VTP domain configuration revision number
  • VTP domain operating mode
  • last VTP updater
  • VTP protocol version
  • VLAN created/deleted notification status
  • maximum VLAN storage
Imported Objects

From CISCO-SMI

ciscoMgmtOBJECT-IDENTITY

From CISCO-TC

Cisco2KVlanList

From IF-MIB

InterfaceIndex
InterfaceIndexOrZero
ifIndexOBJECT-TYPE

From RMON-MIB

OwnerString

From SNMP-FRAMEWORK-MIB

SnmpAdminString

From SNMPv2-CONF

MODULE-COMPLIANCE
NOTIFICATION-GROUP
OBJECT-GROUP

From SNMPv2-SMI

Counter32
Gauge32
Integer32
IpAddress
MODULE-IDENTITY
NOTIFICATION-TYPE
OBJECT-TYPE
Unsigned32

From SNMPv2-TC

DateAndTime
DisplayString
RowStatus
TEXTUAL-CONVENTION
TestAndIncr
TimeStamp
TruthValue
OIDs

FAQ

How is CISCO-VTP-MIB used to detect unexpected VLAN database changes on Cisco switches?
It exposes a VTP management domain table with each domain's configuration revision number, operating mode, and last-updater identity. By polling the revision number over time, an operator can detect an unauthorized or unexpected VLAN database change -- a jump in revision number signals that someone added or removed VLANs, and the last-updater field identifies which switch made the change.

What does CISCO-VTP-MIB tell you about whether VLAN change alerting is active on a switch?
The vtpVlanCreatedNotifEnabled and vtpVlanDeletedNotifEnabled objects confirm whether notifications are turned on for VLAN creation and deletion, letting an operator verify that alerting will actually fire before relying on it, alongside checking vtpStatus to confirm the switch is running in the intended server, client, or transparent mode.

RFC description

Manages VLAN Trunking Protocol (VTP) operation on Cisco devices, supporting VLAN configuration distribution and synchronization across switches.

Start monitoring Cisco Catalyst switches (VLAN Trunking Protocol) with a free 30-day trial of IPNetwork Monitor. Import MIBs, browse SNMP OIDs, create custom SNMP monitors, configure alerts, and monitor any SNMP-enabled network device from a single console.

Download CISCO-VTP-MIB