PDN-BRIDGE-MIB

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Category: DSL and Broadband, Switching

Description: Manages IEEE 802.1D/Q bridge functions including forwarding database, port state, and VLAN membership on Paradyne devices.

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What Is PDN-BRIDGE-MIB?

This is a Paradyne Corporation enterprise MIB that manages IEEE 802.1D/802.1Q bridging functionality on their access/transport devices, covering the bridge forwarding database, port state, and VLAN membership. It exposes bridging-layer data including the transparent bridging forwarding database mapping MAC addresses to ports, plus generic bridge configuration objects. It is used to monitor the software/configuration status of the bridging function, confirming which MAC addresses are learned on which ports and whether bridge ports are in a forwarding or blocking state, which helps diagnose Layer 2 loops, incorrect VLAN forwarding, or unexpected MAC learning behavior. It has an explicit, stated dependency on the standard IEEE 802.1D bridge MIB conventions, which it extends for Paradyne's platform. It is typically deployed on Paradyne DSL/access devices that perform Ethernet bridging as part of a broader access network, and administrators can download the PDN-BRIDGE-MIB file to load it into their MIB browser.

IPNetwork Monitor allows you to monitor SNMP objects defined in PDN-BRIDGE-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

Paradyne Corporation DSL/access bridging device

Monitoring Examples

An administrator would poll the pdnDot1dTpFdb table to look up which MAC addresses are currently associated with which bridge port, verifying expected customer device MACs are learned correctly. Checking pdnDot1dTp port state objects would reveal whether a port is stuck in a blocking state due to spanning tree, explaining a customer connectivity complaint. An unexpected MAC address appearing on the wrong port could indicate a misconfigured VLAN or a Layer 2 loop introduced by a rogue switch, giving bridge-layer visibility complementing the device's higher-layer interface and VLAN monitoring.

What Can Be Monitored

MAC address forwarding database (FDB) entries
bridge port forwarding/blocking state
VLAN membership
generic bridge configuration status

Imported Objects

From PDN-HEADER-MIB

pdn-bridge

From PDN-TC

VnidRange

From RFC-1212

OBJECT-TYPE

From RFC1155-SMI

Counter

From RFC1213-MIB

ifIndex

From SNMPv2-TC

MacAddress

OIDs

OID symbolic	OID numeric	Type	Access	Description
pdnBridgeGenericMIBObjects	1.3.6.1.4.1.1795.2.24.2.21.1
pdnDot1dGenericBridge	1.3.6.1.4.1.1795.2.24.2.21.1.1
MAC pdnDot1dBaseBridgeAddress	1.3.6.1.4.1.1795.2.24.2.21.1.1.1	MacAddress	read-only	The MAC address used by this bridge when it must be referred to in a unique fashion. It is recommended that this be the numerically smallest MAC address of all ports that belong to this bridge. However it is only required to be unique.
INT pdnDot1dBaseNumPorts	1.3.6.1.4.1.1795.2.24.2.21.1.1.2	INTEGER	read-only	The number of ports controlled by this bridging entity.
INT pdnDot1dBaseType	1.3.6.1.4.1.1795.2.24.2.21.1.1.3	INTEGER	read-only	Indicates what type of bridging this bridge can perform.
CTR pdnDot1dTpLearnedEntryDiscards	1.3.6.1.4.1.1795.2.24.2.21.1.1.4	Counter	read-only	The total number of Forwarding Database entries, which have been or would have been learned, but have been discarded due to a lack of space to store them in the Forwarding Database. If this counter is increasing, it indicates that the Forwarding Database is regularly becoming full (a condition which has unpleasant performance effects on the subnetwork). If this counter has a significant value but is not presently increasing, it indicates that the problem has been occurring but is not persistent.
INT pdnDot1dTpAgeingTime	1.3.6.1.4.1.1795.2.24.2.21.1.1.5	INTEGER	read-write	The timeout period in seconds for aging out dynamically learned forwarding information. 802.1D-1990 recommends a default of 300 seconds.
INT pdnDot1dTpAgeingCleanupTime	1.3.6.1.4.1.1795.2.24.2.21.1.1.6	INTEGER	read-write	pdnDot1dTpEntryAgeingCleanupupTime is the length of time before an entry is removed from the bridge . This parameter is typically set to one-half of the bridge Ageing time.
pdnDot1dTpFdb	1.3.6.1.4.1.1795.2.24.2.21.1.2
pdnDot1dTpFdbTable	1.3.6.1.4.1.1795.2.24.2.21.1.2.1		not-accessible	A table that contains information about unicast entries for which the bridge has forwarding and/or filtering information. This information is used by the transparent bridging function in determining how to propagate a received frame.
pdnDot1dTpFdbEntry	1.3.6.1.4.1.1795.2.24.2.21.1.2.1.1		not-accessible	Information about a specific unicast MAC address for which the bridge has some forwarding and/or filtering information.
MAC pdnDot1dTpFdbAddress	1.3.6.1.4.1.1795.2.24.2.21.1.2.1.1.1	MacAddress	read-only	A unicast MAC address for which the bridge has forwarding and/or filtering information.
VNI pdnDot1dTpFdbVnidId	1.3.6.1.4.1.1795.2.24.2.21.1.2.1.1.2	VnidRange	read-only	The VNID Id number of the virtual network for which the bridge has forwarding and/or filtering information.
INT pdnDot1dTpFdbIfIndex	1.3.6.1.4.1.1795.2.24.2.21.1.2.1.1.3	INTEGER	read-only	The ifIndex of the interface associated with the mac address and vlan-id.
INT pdnDot1dTpFdbStatus	1.3.6.1.4.1.1795.2.24.2.21.1.2.1.1.4	INTEGER	read-only	The status of this entry. The meanings of the values are: other(1) : none of the following. This would include the case where some other MIB object (not the corresponding instance of pdnDot1dTpFdbPort, nor an entry in the pdnDot1dStaticTable) in being used to determine if and how frames addressed to the value of the corresponding instance of pdnDot1dTpFdbAddress are being forwarded. invalid(2) : this entry is not longer valid (e.g., it was learned but has since aged-out), but has not yet been flushed from the table. learned(3) : the value of the corresponding instance of pdnDot1dTpFdbPort was learned, and is being used. self(4) : the value of the corresponding instance of pdnDot1dTpFdbAddress represents one of the bridge's addresses. The corresponding instance of pdnDot1dTpFdbPort indicates which of the bridge's ports has this address. mgmt(5) : the value of the corresponding instance of pdnDot1dTpFdbAddress is also the value of an existing instance of pdnDot1dStaticAddress.
INT pdnDot1dTpFdbAgeTime	1.3.6.1.4.1.1795.2.24.2.21.1.2.1.1.5	INTEGER	read-only	The amount of time in seconds that this entry is in the Bridge table
INT pdnDot1dTpFdbFlags	1.3.6.1.4.1.1795.2.24.2.21.1.2.1.1.6	INTEGER	read-only	This object indicates the type of entry in the Bridge table. permanentDHCP -- Entry added due to DHCP client permanentCONFIGURED -- Entry added by User dynamic -- Dynamic Entry
pdnDot1dTp	1.3.6.1.4.1.1795.2.24.2.21.1.3
pdnDot1dTpPortTable	1.3.6.1.4.1.1795.2.24.2.21.1.3.1		not-accessible	A table that contains information about every port that is associated with this transparent bridge.
pdnDot1dTpPortEntry	1.3.6.1.4.1.1795.2.24.2.21.1.3.1.1		not-accessible	A list of information for each port of a transparent bridge.
INT pdnDot1dTpPortMaxInfo	1.3.6.1.4.1.1795.2.24.2.21.1.3.1.1.1	INTEGER	read-only	The maximum size of the INFO (non-MAC) field that this port will receive or transmit.
CTR pdnDot1dTpPortInFrames	1.3.6.1.4.1.1795.2.24.2.21.1.3.1.1.2	Counter	read-only	The number of frames that have been received by this port from its segment. Note that a frame received on the interface corresponding to this port is only counted by this object if and only if it is for a protocol being processed by the local bridging function, including bridge management frames.
CTR pdnDot1dTpPortOutFrames	1.3.6.1.4.1.1795.2.24.2.21.1.3.1.1.3	Counter	read-only	The number of frames that have been transmitted by this port to its segment. Note that a frame transmitted on the interface corresponding to this port is only counted by this object if and only if it is for a protocol being processed by the local bridging function, including bridge management frames.
CTR pdnDot1dTpPortInDiscards	1.3.6.1.4.1.1795.2.24.2.21.1.3.1.1.4	Counter	read-only	Count of frames received which were discarded (i.e., filtered) by the Forwarding Process.
pdnBridgeMIBTraps	1.3.6.1.4.1.1795.2.24.2.21.2

RFC description

Manages bridging operations for Paradyne devices including bridge address, port statistics, and forwarding database control.

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Download PDN-BRIDGE-MIB

What Is PDN-BRIDGE-MIB?

Supported Devices

Monitoring Examples

What Can Be Monitored

This MIB depends on

Related MIBs

RFC description