CISCOSB-vlan-MIB

MIB Reference — IPNetwork Monitor · Updated September 09, 2026

All MIBsCISCOSB-vlan-MIB

Organization: Cisco Small Business

Last Updated: 2006-02-12

Category: Technology: VLAN, Vendor: Cisco

Description: Manages VLAN creation, membership, and configuration on Cisco Small Business switches.

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What Is CISCOSB-vlan-MIB?

This Cisco Small Business proprietary MIB manages VLAN configuration on the switch, covering VLAN naming, tag assignment, per-port VLAN mode, and related switching behaviors like unknown-unicast flooding and voice VLAN support. It is predominantly a configuration MIB, exposing VLAN name-to-tag mappings, port VLAN membership modes, and feature toggles, rather than a fault or performance-counter MIB. In terms of hardware/software status monitoring, its value lies in verifying the switch's current VLAN configuration state (which VLANs exist, which ports belong to them, whether the default VLAN and voice VLAN features are enabled) so operators can catch misconfiguration that would explain traffic segmentation problems. It parallels the concepts in the IEEE 802.1Q VLAN standard and the IETF Q-BRIDGE-MIB, even though it's a proprietary reimplementation. It is used on Cisco Small Business managed switches (Sx200/300/500 series) in any network segmented by VLANs. Engineers can download the CISCOSB-vlan-MIB file directly to load it into their MIB browser.

IPNetwork Monitor allows you to monitor SNMP objects defined in CISCOSB-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 Small Business managed switch

Monitoring Examples

An admin queries vlanNameTable to enumerate every configured VLAN via vlanNameName and vlanNameTag, then cross-references vlanPortModeTable's vlanPortModeState for a given port to confirm it's set to trunk/access mode as expected. If a device isn't reachable on a VLAN, checking whether vlanDefault or vlanVoice is unexpectedly enabled, or whether vlanSendUnknownToAllPorts is misconfigured, can reveal the root cause of unexpected flooding or isolation behavior.

What Can Be Monitored

  • VLAN name-to-tag mapping
  • per-port VLAN mode
  • default VLAN configuration
  • voice VLAN status
  • unknown-unicast flooding behavior
Imported Objects

From BRIDGE-MIB

dot1dBasePortOBJECT-TYPE

From CISCOSB-BRIDGEMIBOBJECTS-MIB

VlanList1
VlanList2
VlanList3
VlanList4

From CISCOSB-MIB

switch001MODULE-IDENTITY

From IF-MIB

ifIndexOBJECT-TYPE

From INET-ADDRESS-MIB

InetAddressType

From Q-BRIDGE-MIB

PortList
VlanIndex
dot1qVlanIndexOBJECT-TYPE

From SNMP-FRAMEWORK-MIB

SnmpAdminString

From SNMPv2-SMI

IpAddress
MODULE-IDENTITY
OBJECT-TYPE

From SNMPv2-TC

DisplayString
MacAddress
RowStatus
TruthValue
OIDs

RFC description

Manages VLAN configuration on Cisco Small Business switches including dynamic VLANs and private VLANs.

Start monitoring Cisco Small Business managed switch 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 CISCOSB-vlan-MIB