All MIBs › Q-IN-Q-MIB
Organization: D-Link Corp.
Last Updated: 2008-04-08
Category: VLAN Management
Description: Manages D-Link IEEE 802.1ad Q-in-Q provider bridge VLAN stacking configuration, S-VLAN port mode, and tag translation.
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What Is Q-IN-Q-MIB?
This is a D-Link proprietary MIB that manages IEEE 802.1ad Q-in-Q (provider-bridge/VLAN-stacking) configuration on D-Link switches, controlling how an outer service-provider VLAN tag encapsulates customer traffic. Its data category is Layer-2 VLAN configuration — global Q-in-Q enable state, per-port role (e.g., uplink/access), and the TPID (tag protocol identifier) used for the outer tag. It is used to monitor the software configuration status of the switch's VLAN-stacking feature — confirming whether Q-in-Q is globally enabled (swQinQState) and whether each port's role and TPID (swQinQPortRole/swQinQPortTpid) are set as intended, which is critical to diagnosing traffic that isn't being tagged/detagged correctly at a provider-bridge boundary. It builds on the IEEE 802.1ad/802.1Q standards for VLAN tagging and complements the standard Q-BRIDGE-MIB used for ordinary VLAN management. It is deployed on D-Link managed switches used as provider-bridge or metro-Ethernet access devices where multiple customer VLANs need to be transported transparently inside a single service-provider VLAN. Engineers searching for 802.1qinq configuration use this MIB to confirm double-VLAN-tagging (Q-in-Q) is correctly applied on a D-Link switch port.
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Supported Devices
- D-Link managed switch
Monitoring Examples
An admin checks swQinQState to confirm Q-in-Q is enabled switch-wide, then walks swQinQPortTable/swQinQPortEntry (keyed by swQinQPortIndex) to verify each port's swQinQPortRole (e.g., configured as a provider "uplink" vs. customer "access" port) and its swQinQPortTpid value. A port showing the wrong role or a non-standard TPID would explain why double-tagged frames are being dropped or mishandled at that port.
What Can Be Monitored
- Q-in-Q global enable state
- per-port Q-in-Q role
- per-port TPID configuration
Imported Objects
From DLINK-ID-REC-MIB
| dlink-common-mgmt |
From SNMPv2-SMI
| IpAddress | |
| MODULE-IDENTITY | |
| OBJECT-TYPE |
From SNMPv2-TC
| DisplayString | |
| MacAddress | |
| RowStatus |
OIDs
RFC description
Manages Q-in-Q (802.1ad) VLAN tunneling on D-Link switches with inner and outer VLAN tag configuration.
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