All MIBs › Dell-rldot1q-MIB
Organization: Dell
Last Updated: 2008-11-25
Category: Technology: Bridging, Technology: VLAN, Vendor: Dell
Description: Extends IEEE 802.1Q VLAN management with Dell-specific VLAN configuration and tagging objects.
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What Is Dell-rldot1q-MIB?
This private MIB extends the standard IEEE 802.1Q bridge MIB with Dell-specific VLAN configuration and forwarding-database objects, using the RAD-derived "rl"-prefixed embedded switch OS found in several Dell-branded switches. It exposes VLAN-tagged static unicast forwarding entries and forwarding database (FDB) tables, including per-VLAN/per-port MAC address counts by entry type (e.g. learned, static, self). As status/health data it is most useful for verifying Layer 2 forwarding behavior: rldot1qTpFdbCountTable lets an administrator see how many MAC addresses are learned on each VLAN/port combination, and rldot1qTpFdbSubStatus indicates the forwarding state of a given entry, both useful for spotting MAC flapping, table exhaustion, or unexpected forwarding behavior. It directly extends the IETF/IEEE dot1q Bridge MIB conceptual model with vendor-private object identifiers. It is deployed on Dell VLAN-capable switches wherever detailed FDB visibility beyond the standard bridge MIB is needed. Engineers can download the Dell-rldot1q-MIB file directly to load it into their MIB browser.
IPNetwork Monitor allows you to monitor SNMP objects defined in Dell-rldot1q-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
- Dell PowerConnect managed switches (RAD/RadLAN-derived embedded switch OS)
Monitoring Examples
An engineer diagnosing a MAC-address table issue would query rldot1qTpFdbTable/rldot1qTpFdbEntry to check rldot1qTpFdbSubStatus for a given VLAN/MAC, and use rldot1qTpFdbCountTable (rldot1qTpFdbCountVlanTag, rldot1qTpFdbCountPort, rldot1qTpFdbCountType, rldot1qTpFdbCountCount) to see the learned-address count per port for a suspiciously high number suggesting a loop or MAC flooding attack. rldot1qStaticUnicastTable would be checked to confirm statically configured unicast entries (rldot1qStaticUnicastAddressOwner) are correctly present. An abnormally high FDB count on one port relative to baseline would flag a potential switching loop.
What Can Be Monitored
- FDB entry status per VLAN/MAC
- learned MAC address counts per port/VLAN
- static unicast forwarding entries
- entry type (static/dynamic)
Imported Objects
From Dell-BRIDGEMIBOBJECTS-MIB
| rlpBridgeMIBObjects | MODULE-IDENTITY |
From Dell-MIB
| rnd | MODULE-IDENTITY |
From IF-MIB
| ifIndex | OBJECT-TYPE |
From Q-BRIDGE-MIB
| PortList | |
| dot1qStaticUnicastEntry | OBJECT-TYPE |
| dot1qTpFdbEntry | OBJECT-TYPE |
From SNMPv2-SMI
| Integer32 | |
| MODULE-IDENTITY | |
| OBJECT-TYPE | |
| Unsigned32 |
From SNMPv2-TC
| RowStatus | |
| TEXTUAL-CONVENTION | |
| TruthValue |
OIDs
RFC description
Extends IEEE 802.1Q VLAN MIB with Dell-specific enhancements for static unicast address management and VLAN forwarding tables.
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