TN-MAC-MIB

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Organization: Transition Networks, Inc.

Last Updated: 2013-06-18

Category: Switch and Bridge Management, Transition Networks Media Converters

Description: Manages Transition Networks MAC address table entries, aging, and port filtering.

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What Is TN-MAC-MIB?

TN-MAC-MIB is a Transition Networks proprietary module for managing MAC address table behavior on their Ethernet switches. It exposes configuration and state data covering automatic MAC address aging (enable/disable and aging time), per-port learning enablement, and static MAC address entries bound to VLANs and port members. Its monitoring value is largely software/configuration-status oriented: administrators can verify that dynamic MAC learning is functioning as expected on each port and that manually pinned static MAC entries remain correctly applied, which is important for troubleshooting forwarding problems or detecting unauthorized topology changes. It complements the standard BRIDGE-MIB/Q-BRIDGE-MIB forwarding database objects with vendor-specific aging and static-entry controls. It is typically deployed on access and aggregation switches where predictable MAC learning behavior and fixed static bindings (e.g., for security appliances or critical servers) are required. Engineers can download the TN-MAC-MIB file directly to load it into their MIB browser.

IPNetwork Monitor allows you to monitor SNMP objects defined in TN-MAC-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

Transition Networks managed Ethernet switch

Monitoring Examples

An administrator would poll tnMacLearningTable and tnMacTablePortLearning to confirm learning is enabled on the correct ports, and check tnMacAgeAutomaticAgingTime to verify the configured aging interval matches network design expectations. Querying tnMacStaticConfigTable entries (tnStaticMacAddress, tnStaticMacVlanId, tnStaticMacPortMembers, tnStaticMacStatus) would reveal whether a static binding intended to pin a critical device's MAC to a specific port and VLAN is still active; a status showing 'inactive' or missing would indicate the binding was lost, possibly after a configuration reload.

What Can Be Monitored

automatic MAC aging enable state and timer
per-port MAC learning mode
static MAC address entries
static entry VLAN and port bindings
static entry status

Imported Objects

From IF-MIB

ifIndex

OBJECT-TYPE

From Q-BRIDGE-MIB

PortList
VlanId

From SNMPv2-SMI

Integer32
OBJECT-TYPE
Unsigned32

From SNMPv2-TC

MacAddress
RowStatus
TruthValue

From TRANSITION-SMI

tnProducts

OBJECT-IDENTITY

OIDs

OID symbolic	OID numeric	Type	Access	Description
tnMacMib	1.3.6.1.4.1.868.2.5.142			The mib module for managing configuration of MAC.
tnMacMibNotifications	1.3.6.1.4.1.868.2.5.142.0
tnMacMibObjects	1.3.6.1.4.1.868.2.5.142.1
tnMacAgeAutomaticConfig	1.3.6.1.4.1.868.2.5.142.1.1
T/F tnMacAgeAutomaticAgingDisable	1.3.6.1.4.1.868.2.5.142.1.1.1	TruthValue	read-write	Disable the automatic aging of dynamic entries.
I32 tnMacAgeAutomaticAgingTime	1.3.6.1.4.1.868.2.5.142.1.1.2	Integer32	read-write	Configure aging time by entering a value here in seconds. The allowed range is 10 to 1000000 seconds.
tnMacLearningTable	1.3.6.1.4.1.868.2.5.142.1.2		not-accessible	This table displays MAC table learning.
tnMacLearningEntry	1.3.6.1.4.1.868.2.5.142.1.2.1		not-accessible	The entry represents MAC table learning in each port.
INT tnMacTablePortLearning	1.3.6.1.4.1.868.2.5.142.1.2.1.1	INTEGER	read-write	If the learning mode for a given port is greyed out, another module is in control of the mode, so that it cannot be changed by the user. An example of such a module is the MAC-Based Authentication under 802.1X. Each port can do learning based upon the following settings: Auto Learning is done automatically as soon as a frame with unknown SMAC is received. Disable No learning is done. Secure Only static MAC entries are learned, all other frames are dropped. Note: Make sure that the link used for managing the switch is added to the Static Mac Table before changing to secure learning mode, otherwise the management link is lost and can only be restored by using another non-secure port or by connecting to the switch via the serial interface.
tnMacStaticConfigTable	1.3.6.1.4.1.868.2.5.142.1.3		not-accessible	The static entries in the MAC table are shown in this table. The static MAC table can contain 64 entries.
tnMacStaticConfigEntry	1.3.6.1.4.1.868.2.5.142.1.3.1		not-accessible	The static entries in the MAC table are shown in this table.
VLA tnStaticMacVlanId	1.3.6.1.4.1.868.2.5.142.1.3.1.1	VlanId	not-accessible	The VLAN ID of the entry.
MAC tnStaticMacAddress	1.3.6.1.4.1.868.2.5.142.1.3.1.2	MacAddress	not-accessible	The MAC address of the entry.
POR tnStaticMacPortMembers	1.3.6.1.4.1.868.2.5.142.1.3.1.3	PortList	read-write	Checkmarks indicate which ports are members of the entry. Check or uncheck as needed to modify the entry.
ROW tnStaticMacStatus	1.3.6.1.4.1.868.2.5.142.1.3.1.4	RowStatus	read-write	The status of the row. The writable columns in a row can not be changed if the row is active. All columns must have a valid value before a row can be activated.
tnMacAddressTable	1.3.6.1.4.1.868.2.5.142.1.4		not-accessible	Navigating the MAC Table.
tnMacAddressEntry	1.3.6.1.4.1.868.2.5.142.1.4.1		not-accessible	Each entriy represents a MAC address.
INT tnMacType	1.3.6.1.4.1.868.2.5.142.1.4.1.1	INTEGER	not-accessible	Indicates whether the entry is a static or a dynamic entry.
VLA tnMacVlan	1.3.6.1.4.1.868.2.5.142.1.4.1.2	VlanId	not-accessible	The VLAN ID of the entry.
MAC tnMacAddress	1.3.6.1.4.1.868.2.5.142.1.4.1.3	MacAddress	not-accessible	The MAC address of the entry.
POR tnMacPortMembers	1.3.6.1.4.1.868.2.5.142.1.4.1.4	PortList	read-only	The ports that are members of the entry. The value of this object in high 8 bits describe the status from the first port to last port. In low 8 bits, the valus of first bit is the status of port mgmt, while the second is the status of port cpu, the default value of other bits are zero.
T/F tnMacDynamicClear	1.3.6.1.4.1.868.2.5.142.1.5	TruthValue	read-write	Flush all dynamic entries if the value is true.
tnMacMibConformance	1.3.6.1.4.1.868.2.5.142.2

RFC description

Vendor-private MIB for media access control (MAC) layer management; monitors MAC layer functions and bridge/switch operations.

Start monitoring Transition Networks managed Ethernet switch (MAC address aging/static-entry config status) 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 TN-MAC-MIB

What Is TN-MAC-MIB?

Supported Devices

Monitoring Examples

What Can Be Monitored

This MIB depends on

Related MIBs

RFC description