BEGEMOT-BRIDGE-MIB

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Organization: Sofia University St. Kliment Ohridski

Last Updated: 2007-08-06

Category: Net-SNMP and Linux, VLAN and Bridging

Description: Manages IEEE 802.1D bridging, spanning tree, and forwarding database on FreeBSD bsnmpd-managed systems.

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What Is BEGEMOT-BRIDGE-MIB?

BEGEMOT-BRIDGE-MIB, also part of the FreeBSD Begemot bsnmpd suite, manages IEEE 802.1D Ethernet bridging and spanning-tree state on BSD-based systems acting as software bridges. It exposes bridge base identity (base address, number of ports), per-port bridge membership mapped to the underlying interface index, spanning-tree enablement, and notification objects for topology events. Its health value lies in confirming bridge and port operational state and in the notifications generated on spanning-tree topology changes, which flag loops, link flaps, or port state transitions on the software bridge. It directly implements/extends the IETF BRIDGE-MIB (RFC 4188) concepts within the BSD SNMP agent framework. It is typically deployed on FreeBSD systems configured as Ethernet bridges or virtual switches, where administrators can perform a BEGEMOT-BRIDGE-MIB download to add it to their SNMP monitoring stack.

IPNetwork Monitor allows you to monitor SNMP objects defined in BEGEMOT-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

vendor-neutral, standards-based MIB (IEEE 802.1D bridging) for FreeBSD bsnmpd
FreeBSD-based Ethernet bridge/software switch

Monitoring Examples

Querying begemotBridgeBaseTable/begemotBridgeBaseEntry for begemotBridgeBaseNumPorts and begemotBridgeBaseStatus confirms the bridge instance is active with the expected port count, while begemotBridgeBasePortTable/begemotBridgeBasePortEntry maps each begemotBridgeBasePort to its underlying begemotBridgeBasePortIfIndex. A begemotBridgeNotifications trap fired when begemotBridgeBaseSpanEnabled is toggled or a port transitions state would alert an admin to an unexpected spanning-tree topology change, often indicating a loop or a flapping uplink.

What Can Be Monitored

bridge base identity/port count
per-port bridge-to-interface mapping
spanning tree enablement
spanning tree topology change notifications

Imported Objects

From BEGEMOT-MIB

begemot

MODULE-IDENTITY

From BRIDGE-MIB

BridgeId
Timeout

From IF-MIB

InterfaceIndex

From SNMPv2-SMI

Counter32
Integer32
MODULE-IDENTITY
NOTIFICATION-TYPE
OBJECT-TYPE
TimeTicks
mib-2

From SNMPv2-TC

MacAddress
RowStatus
TEXTUAL-CONVENTION
TruthValue

How to Use in IPNetwork Monitor

Example using begemotBridgeBasePortDelayExceededDiscards OID:

Select a FreeBSD-based bridges/switch as the target host to create a monitor — the SNMP service should be up and running on it. Click New Monitor, then check SNMP Custom on the Favorites tab, click Next, and confirm the host. On the next page, click Select... to open the built-in SNMP MIB Browser and type begemotBridgeBasePortDelayExceededDiscards into the Find box to locate it in the OID tree, selecting the specific row/instance you want to monitor since this is a table column, then select it and click OK. The number of frames discarded by this port due to excessive transit delay through the bridge. On the monitor's Main parameters page you can set the target's SNMP port (default 161), credentials, polling interval, and other settings — see the SNMP Monitor help for details. On the State conditions and Alerting tabs, configure when the monitor should change state and trigger an alert; since this is a Counter32-type OID, Value bounds is the most useful condition here — trigger an alert if the counter increases between polls, since a rising count of errors, failures, or discards often points to a real underlying problem. Click Finish to create the monitor; you can adjust any parameter later.

OIDs

OID symbolic	OID numeric	Type	Access	Description
begemotBridge	1.3.6.1.4.1.12325.1.205			The Begemot MIB for managing bridge interfaces.
begemotBridgeBase	1.3.6.1.4.1.12325.1.205.1
MAC begemotBridgeBaseAddress	1.3.6.1.4.1.12325.1.205.1.1.1.2	MacAddress	read-only	The MAC address of the bridge interface.
begemotBridgeBaseEntry	1.3.6.1.4.1.12325.1.205.1.1.1		not-accessible	A list of information for the bridge interfaces on the managed device.
BRI begemotBridgeBaseName	1.3.6.1.4.1.12325.1.205.1.1.1.1	BridgeIfName	read-only	The name of the bridge interface for which this entry contains management information.
I32 begemotBridgeBaseNumPorts	1.3.6.1.4.1.12325.1.205.1.1.1.3	Integer32	read-only	The number of ports, members of this bridge.
I32 begemotBridgeBasePort	1.3.6.1.4.1.12325.1.205.1.2.1.1	Integer32	read-only	The system interface index of the interface corresponding to this port.
C32 begemotBridgeBasePortDelayExceededDiscardsEx	1.3.6.1.4.1.12325.1.205.1.2.1.4	Counter32	read-only	The number of frames discarded by this port due to excessive transit delay through the bridge.
begemotBridgeBasePortEntry	1.3.6.1.4.1.12325.1.205.1.2.1		not-accessible	A list of information about a specific port, member of a bridge interface.
NUM begemotBridgeBasePortIfIndex	1.3.6.1.4.1.12325.1.205.1.2.1.2	InterfaceIndex	read-only	The value of the instance of the ifIndex object, defined in IF-MIB, for the interface corresponding to this port.
C32 begemotBridgeBasePortMtuExceededDiscards	1.3.6.1.4.1.12325.1.205.1.2.1.5	Counter32	read-only	The number of frames discarded by this port due to an excessive size.
T/F begemotBridgeBasePortPrivate	1.3.6.1.4.1.12325.1.205.1.2.1.7	TruthValue	read-write	The value of this objects reflects whether the port has a PRIVATE flag set. A port with this flags set can only communicate with ports not having the PRIVATE flag set.
ROW begemotBridgeBasePortStatus	1.3.6.1.4.1.12325.1.205.1.2.1.6	RowStatus	read-create	Used to control addition of member ports to or removal of member ports from a specified bridge.
begemotBridgeBasePortTable	1.3.6.1.4.1.12325.1.205.1.2		not-accessible	A table containing generic information about ports, members of each bridge interface.
INT begemotBridgeBaseSpanEnabled	1.3.6.1.4.1.12325.1.205.1.2.1.3	INTEGER	read-write	The value of this objects reflects whether the port is a span port on the specified bridge interface.
ROW begemotBridgeBaseStatus	1.3.6.1.4.1.12325.1.205.1.1.1.5	RowStatus	read-create	Used to create/destroy bridge interfaces on the managed device.
begemotBridgeBaseTable	1.3.6.1.4.1.12325.1.205.1.1		not-accessible	A table that contains generic information for each bridge interface on the managed device.
INT begemotBridgeBaseType	1.3.6.1.4.1.12325.1.205.1.1.1.4	INTEGER	read-only	Indicates what type of bridging this bridge can perform.
begemotBridgeConfigObjects	1.3.6.1.4.1.12325.1.205.5
TIM begemotBridgeDataPoll	1.3.6.1.4.1.12325.1.205.5.3	Timeout	read-write	The polling rate of data when the module is idle.
TIM begemotBridgeDataUpdate	1.3.6.1.4.1.12325.1.205.5.2	Timeout	read-write	The maximum age in seconds of the cached data.
BRI begemotBridgeDefaultBridgeIf	1.3.6.1.4.1.12325.1.205.5.1	BridgeIfNameOrEmpty	read-write	The name of the bridge interface that will be managed via objects in IETF BRIDGE-MIB (RFC4188). If the object's value is set to an empty string, bridge interfaces will only be managed via objects in this MIB module.
INT begemotBridgeLayer2PfStatus	1.3.6.1.4.1.12325.1.205.4.4	INTEGER	read-write	This value indicates whether layer2 filtering by a firewall package is enabled for bridge interfaces.
NTF begemotBridgeNewRoot	1.3.6.1.4.1.12325.1.205.0.1			The begemotBridgeNewRoot trap indicates that one of the bridge interfaces on the sending agent's device has become the new root of the spanning tree topology it is participating in.
begemotBridgeNotifications	1.3.6.1.4.1.12325.1.205.0
begemotBridgePf	1.3.6.1.4.1.12325.1.205.4
T/F begemotBridgePfilIpOnly	1.3.6.1.4.1.12325.1.205.4.3	TruthValue	read-write	This value controls the handling of non-IP packets which are not passed on for further processing to a firewall package. A value of false(0) indicates that all non-IP Ethernet frames are passed unconditionally.
T/F begemotBridgePfilMembers	1.3.6.1.4.1.12325.1.205.4.2	TruthValue	read-write	A value of true(1) indicates that packet filtering is enabled on both incoming and outgoing bridge member interfaces.
T/F begemotBridgePfilStatus	1.3.6.1.4.1.12325.1.205.4.1	TruthValue	read-write	Indicates whether packet filtering by some firewall package is enabled on the bridge interface.
begemotBridgeStp	1.3.6.1.4.1.12325.1.205.2
TIM begemotBridgeStpBridgeForwardDelay	1.3.6.1.4.1.12325.1.205.2.1.1.14	Timeout	read-write	The value that all bridges participating in the spanning tree would use for ForwardDelay if this bridge was the root of the spanning tree.
TIM begemotBridgeStpBridgeHelloTime	1.3.6.1.4.1.12325.1.205.2.1.1.13	Timeout	read-write	The value that all bridges participating in the spanning tree would use for HelloTime if this bridge was the root of the spanning tree.
TIM begemotBridgeStpBridgeMaxAge	1.3.6.1.4.1.12325.1.205.2.1.1.12	Timeout	read-write	The value that all bridges participating in the spanning tree would use for MaxAge if this bridge was the root of the spanning tree.
BRI begemotBridgeStpDesignatedRoot	1.3.6.1.4.1.12325.1.205.2.1.1.5	BridgeId	read-only	The bridge identifier of the root of the spanning tree as calculated by the Spanning Tree Protocol.
begemotBridgeStpEntry	1.3.6.1.4.1.12325.1.205.2.1.1		not-accessible	A list of information about the Spanning Tree Protocol operation on a bridge interface.
begemotBridgeStpExtPortEntry	1.3.6.1.4.1.12325.1.205.2.3.1		not-accessible	A list of Rapid Spanning Tree information maintained by each bridge interface member.
begemotBridgeStpExtPortTable	1.3.6.1.4.1.12325.1.205.2.3		not-accessible	A table that contains port-specific Rapid Spanning Tree information for the bridge interface members.
TIM begemotBridgeStpForwardDelay	1.3.6.1.4.1.12325.1.205.2.1.1.11	Timeout	read-only	This value, measured in units of hundredths of a second determines how long a port will stay consecutively in the Listening and Learning states before transitioning to Forwarding state. This is the actual value currently used by the bridge as opposed to begemotBridgeStpBridgeForwardDelay, which is the value this and all bridges participating in the spanning tree were to use, if this was the root bridge.
TIM begemotBridgeStpHelloTime	1.3.6.1.4.1.12325.1.205.2.1.1.9	Timeout	read-only	The amount of time between transmission of Configuration BPDUs by this bridge on any port, when it is the root of the spanning tree or is trying to become so. This is the actual value that this bridge is currently using.
I32 begemotBridgeStpHoldTime	1.3.6.1.4.1.12325.1.205.2.1.1.10	Integer32	read-only	This time value determines the interval length during which no more than two Configuration BPDUs shall be transmitted by this node, in units of hundredths of a second.
TIM begemotBridgeStpMaxAge	1.3.6.1.4.1.12325.1.205.2.1.1.8	Timeout	read-only	The maximum age of Spanning Tree Protocol information received from the network on any port, before that information is discarded. This is the actual value that the bridge is currently using.
I32 begemotBridgeStpPort	1.3.6.1.4.1.12325.1.205.2.2.1.1	Integer32	read-only	The system interface index of the interface corresponding to this port, for which the management entity has Spanning Tree Protocol information.
T/F begemotBridgeStpPortAdminEdgePort	1.3.6.1.4.1.12325.1.205.2.3.1.2	TruthValue	read-write	The administrative value of the Edge Port parameter. A value of true(1) indicates that this port should be assumed as an edge-port, and a value of false(2) indicates that this port should be assumed as a non-edge-port. Setting this object will also cause the corresponding instance of begemotBridgeStpPortOperEdgePort to change to the same value. Note that even when this object's value is true, the value of the corresponding instance of begemotBridgeStpPortOperEdgePort can be false if a BPDU has been received. The value of this object MUST be retained across reinitializations of the management system.
I32 begemotBridgeStpPortAdminPathCost	1.3.6.1.4.1.12325.1.205.2.3.1.6	Integer32	read-write	The administratively assigned value for the contribution of this port to the path cost of paths toward the spanning tree root. Writing a value of '0' assigns the automatically calculated default Path Cost value to the port. If the default Path Cost is being used, this object returns '0' when read. This complements the object begemotBridgeStpPortPathCost or begemotBridgeStpPortPathCost32, which returns the operational value of the path cost. The value of this object MUST be retained across reinitializations of the management system.
INT begemotBridgeStpPortAdminPointToPoint	1.3.6.1.4.1.12325.1.205.2.3.1.4	INTEGER	read-write	The administrative point-to-point status of the LAN segment attached to this port, using the enumeration values of the IEEE 802.1w clause. A value of forceTrue(0) indicates that this port should always be treated as if it is connected to a point-to-point link. A value of forceFalse(1) indicates that this port should be treated as having a shared media connection. A value of auto(2) indicates that this port is considered to have a point-to-point link if it is an Aggregator and all of its members are aggregatable, or if the MAC entity is configured for full duplex operation, either through auto-negotiation or by management means. Manipulating this object changes the underlying adminPortToPortMAC. The value of this object MUST be retained across reinitializations of the management system.
BRI begemotBridgeStpPortDesignatedBridge	1.3.6.1.4.1.12325.1.205.2.2.1.8	BridgeId	read-only	The unique Bridge Identifier of the bridge to which the port belongs, in the case when the port is a designated port, otherwise the bridge believed to be the Designated Bridge for the LAN to which this port is attached.
I32 begemotBridgeStpPortDesignatedCost	1.3.6.1.4.1.12325.1.205.2.2.1.7	Integer32	read-only	For a Designated port, the path cost (equal to the Root Path Cost of the bridge) offered to the LAN to which the port is attached otherwise the cost of the path to the Root offered by the Designated Port on the LAN to which this Port is attached.
BRI begemotBridgeStpPortDesignatedPort	1.3.6.1.4.1.12325.1.205.2.2.1.9	BridgePortId	read-only	The Port Identifier of the Bridge port, on the Designated Bridge, through which the Designated Bridge transmits the Configuration Message information stored by this port.
BRI begemotBridgeStpPortDesignatedRoot	1.3.6.1.4.1.12325.1.205.2.2.1.6	BridgeId	read-only	The unique Bridge Identifier of the bridge recorded as the root in the Root Identifier parameter of Configuration BPDUs transmitted by the Designated Bridge for the LAN to which the port is attached.
INT begemotBridgeStpPortEnable	1.3.6.1.4.1.12325.1.205.2.2.1.4	INTEGER	read-write	The administrative Spanning Tree Protocol state of the port - value of enabled(1) indicates that the port is participating in the Spanning Tree Protocol operation.
begemotBridgeStpPortEntry	1.3.6.1.4.1.12325.1.205.2.2.1		not-accessible	A list of Spanning Tree Protocol information about a specific member of a bridge interface.
C32 begemotBridgeStpPortForwardTransitions	1.3.6.1.4.1.12325.1.205.2.2.1.10	Counter32	read-only	The number of times this port has transitioned from the Learning state to the Forwarding state.
T/F begemotBridgeStpPortOperEdgePort	1.3.6.1.4.1.12325.1.205.2.3.1.3	TruthValue	read-only	The operational value of the Edge Port parameter. The object is initialized to the value of the corresponding instance of begemotBridgeStpPortAdminEdgePort. When the corresponding instance of begemotBridgeStpPortAdminEdgePort is set, this object will be changed as well. This object will also be changed to false on reception of a BPDU.
T/F begemotBridgeStpPortOperPointToPoint	1.3.6.1.4.1.12325.1.205.2.3.1.5	TruthValue	read-only	The operational point-to-point status of the LAN segment attached to this port. It indicates whether a port is considered to have a point-to-point connection. If adminPointToPointMAC is set to auto(2), then the value of operPointToPointMAC is determined in accordance with the specific procedures defined for the MAC entity concerned, as defined in IEEE 802.1w, clause 6.5. The value is determined dynamically; that is, it is re-evaluated whenever the value of adminPointToPointMAC changes, and whenever the specific procedures defined for the MAC entity evaluates a change in its point-to-point status.
I32 begemotBridgeStpPortPathCost	1.3.6.1.4.1.12325.1.205.2.2.1.5	Integer32	read-write	The contribution of the path through this port, when the port is the Root Port, to the total cost of the path to the root bridge for this bridge.
I32 begemotBridgeStpPortPriority	1.3.6.1.4.1.12325.1.205.2.2.1.2	Integer32	read-write	The STP priority of this port that is contained in the first octet of its Port Identifier. The second octet contains the value of begemotBridgeStpPort.
T/F begemotBridgeStpPortProtocolMigration	1.3.6.1.4.1.12325.1.205.2.3.1.1	TruthValue	read-write	When operating in RSTP (version 2) mode, writing true(1) to this object forces this port to transmit RSTP BPDUs. Any other operation on this object has no effect and it always returns false(2) when read.
INT begemotBridgeStpPortState	1.3.6.1.4.1.12325.1.205.2.2.1.3	INTEGER	read-only	The current state of the port as defined by the operation of the Spanning Tree Protocol. If the Spanning Tree Protocol is administratively disabled on the port, this object shall have value disabled(1). A value of broken(6) does not correspond to any legal state of a port, and if present should indicate error in the operation of either the Spanning Tree Protocol implementation running on the device or the management entity.
begemotBridgeStpPortTable	1.3.6.1.4.1.12325.1.205.2.2		not-accessible	A table containing Spanning Tree Protocol information about the members of each bridge interface.
I32 begemotBridgeStpPriority	1.3.6.1.4.1.12325.1.205.2.1.1.2	Integer32	read-write	The priority value of the bridge interface forming the first two octets of the bridge identifier. Acceptable values are 0-61440, in steps of 4096.
INT begemotBridgeStpProtocolSpecification	1.3.6.1.4.1.12325.1.205.2.1.1.1	INTEGER	read-only	The Spanning Tree Protocol version being run on the bridge interface. The value 'decLb100(2)' indicates the DEC LANbridge 100 Spanning Tree protocol, 'ieee8021d(3)' indicates the bridge is running IEEE 802.1D STP implementation.
I32 begemotBridgeStpRootCost	1.3.6.1.4.1.12325.1.205.2.1.1.6	Integer32	read-only	The cost of the path from this bridge to the root bridge.
I32 begemotBridgeStpRootPort	1.3.6.1.4.1.12325.1.205.2.1.1.7	Integer32	read-only	The port number of the port that offers the lowest cost path from this bridge to the root bridge of the spanning tree. If this bridge is the root bridge, this object shall have a value of zero.
begemotBridgeStpTable	1.3.6.1.4.1.12325.1.205.2.1		not-accessible	A table that contains Spanning Tree Protocol information for each bridge interface on the managed device.
TIK begemotBridgeStpTimeSinceTopologyChange	1.3.6.1.4.1.12325.1.205.2.1.1.3	TimeTicks	read-only	The time (in hundreds of a second) since a topology change was last detected by this bridge.
C32 begemotBridgeStpTopChanges	1.3.6.1.4.1.12325.1.205.2.1.1.4	Counter32	read-only	The number of times a topology change was detected by the bridge interface since the management entity was initialized or reset.
I32 begemotBridgeStpTxHoldCount	1.3.6.1.4.1.12325.1.205.2.1.1.16	Integer32	read-write	The value used by the Port Transmit state machine to limit the maximum transmission rate of BPDUs on the bridge interface. The value of this object MUST be retained across reinitializations of the management system.
INT begemotBridgeStpVersion	1.3.6.1.4.1.12325.1.205.2.1.1.15	INTEGER	read-write	The version of Spanning Tree Protocol the bridge is currently running. The value 'stpCompatible(0)' indicates the Spanning Tree Protocol specified in IEEE 802.1D-1998 and 'rstp(2)' indicates the Rapid Spanning Tree Protocol specified in IEEE 802.1w and clause 17 of 802.1D-2004. The values are directly from the IEEE standard. New values may be defined as future versions of the protocol become available. The value of this object MUST be retained across reinitializations of the management system.
NTF begemotBridgeTopologyChange	1.3.6.1.4.1.12325.1.205.0.2			A begemotBridgeTopologyChange trap is send when a member port on one of the bridge interfaces, monitored by the agent, transitions from the Learning state to the Forwarding state, or from the Forwarding state to the Blocking state. The trap is not sent if a begemotBridgeNewRoot trap is sent for the same transition.
begemotBridgeTp	1.3.6.1.4.1.12325.1.205.3
I32 begemotBridgeTpAgingTime	1.3.6.1.4.1.12325.1.205.3.1.1.2	Integer32	read-write	The timeout period in seconds before aging out dynamically learnt forwarding entries.
begemotBridgeTpEntry	1.3.6.1.4.1.12325.1.205.3.1.1		not-accessible	A list of information regarding transparent bridging on a bridge interface.
MAC begemotBridgeTpFdbAddress	1.3.6.1.4.1.12325.1.205.3.2.1.1	MacAddress	read-only	A unicast MAC address for which the bridge has which the bridge interface has some forwarding and/or filtering information.
begemotBridgeTpFdbEntry	1.3.6.1.4.1.12325.1.205.3.2.1		not-accessible	Information about a specific unicast MAC address for which the bridge interface has some forwarding and/or filtering information.
I32 begemotBridgeTpFdbPort	1.3.6.1.4.1.12325.1.205.3.2.1.2	Integer32	read-only	The port number of the bridge port on which a frame having a source address equal to the value of the corresponding instance of begemotBridgeTpFdbAddress has been seen.
INT begemotBridgeTpFdbStatus	1.3.6.1.4.1.12325.1.205.3.2.1.3	INTEGER	read-only	The status of this entry. The meanings of the values are: other(1) - none of the following. invalid(2) - this entry is no 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 begemotBridgeTpFdbPort was learned, and is being used. self(4) - the value of the corresponding instance of begemotBridgeTpFdbAddress represents one of the bridge's addresses. The corresponding instance of begemotBridgeTpFdbPort indicates which of the bridge's ports has this address. mgmt(5) - the value of the corresponding instance of begemotBridgeTpFdbAddress has been added to the bridge's Forwarding Database by some management means.
begemotBridgeTpFdbTable	1.3.6.1.4.1.12325.1.205.3.2		not-accessible	A table that contains information about unicast entries for which the bridge interfaces have forwarding and/or filtering information. This information is used by the bridge interfaces to make forwarding decisions.
C32 begemotBridgeTpLearnedEntryDiscards	1.3.6.1.4.1.12325.1.205.3.1.1.1	Counter32	read-only	The total number of Forwarding Database entries that would have been learnt, but have been discarded due to Forwarding Address Table having reached it's maximum entries limit.
I32 begemotBridgeTpMaxAddresses	1.3.6.1.4.1.12325.1.205.3.1.1.3	Integer32	read-write	The maximum number of entires that this bridge can learn in it's Forwarding Address Table and use for making forwarding decisions.
I32 begemotBridgeTpPort	1.3.6.1.4.1.12325.1.205.3.3.1.1	Integer32	read-only	The system interface index of the port for which this entry contains Transparent bridging management information.
begemotBridgeTpPortEntry	1.3.6.1.4.1.12325.1.205.3.3.1		not-accessible	A list of information about every bridge port, member of a bridge interface, associated with the bridge's transparent bridging function.
C32 begemotBridgeTpPortInDiscards	1.3.6.1.4.1.12325.1.205.3.3.1.5	Counter32	read-only	Count of received valid frames that were discarded (i.e., filtered) by the Forwarding Process.
C32 begemotBridgeTpPortInFrames	1.3.6.1.4.1.12325.1.205.3.3.1.3	Counter32	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.
I32 begemotBridgeTpPortMaxInfo	1.3.6.1.4.1.12325.1.205.3.3.1.2	Integer32	read-only	The maximum size of the INFO (non-MAC) field that this port will receive or transmit.
C32 begemotBridgeTpPortOutFrames	1.3.6.1.4.1.12325.1.205.3.3.1.4	Counter32	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.
begemotBridgeTpPortTable	1.3.6.1.4.1.12325.1.205.3.3		not-accessible	A table that contains information about every bridge port, member of a bridge interface, associated with the transparent bridging function of the bridge.
begemotBridgeTpTable	1.3.6.1.4.1.12325.1.205.3.1		not-accessible	A table that contains information regarding transparent bridging for each bridge interface on the managed device.

RFC description

Manages bridge interface configuration including STP, RSTP, and port monitoring for network switches.

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