IEEE8021-SECY-MIB

MIB Reference — IPNetwork Monitor · Updated September 09, 2026

All MIBsIEEE8021-SECY-MIB

Organization: IEEE 802.1 Working Group

Last Updated: 2017-12-07

Category: Standard: IEEE 802, VPN and Security

Description: IEEE 802.1 MIB for MAC Security (MACsec/802.1AE) managing encryption keys, secure channels, and security associations.

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What Is IEEE8021-SECY-MIB?

IEEE8021-SECY-MIB is a vendor-neutral IEEE 802.1 standards MIB for the MAC Security Entity (SecY), the protocol shim that implements 802.1AE MACsec encryption on an interface to protect Ethernet frames between peers on a LAN. It exposes per-interface SecY configuration and capability data, including how many peer Secure Channels (SCs) and cryptographic keys are supported, whether frame protection/validation and replay protection are enabled, and which cipher suite is currently in use. Its monitoring relevance is primarily security-posture and link-protection status: secyIfProtectFramesEnable and secyIfValidateFrames confirm MACsec encryption is actually active rather than silently bypassed, secyIfReplayProtectEnable/Window reveal whether anti-replay defenses are configured as expected, and secyIfCurrentCipherSuite lets an operator verify the negotiated encryption strength—faults here manifest as unprotected traffic or interoperability failures rather than classic hardware alarms. It is layered on top of the standard IEEE 802.1X/802.1AE architecture and typically coexists with related SecY-CP and dot1x MIBs managing the surrounding key-agreement and port-authentication context. It is deployed on Ethernet switches, routers, and NICs across any vendor that implement hardware or software MACsec encryption on point-to-point or shared-media links. Security teams new to MACsec instrumentation often consult an IEEE8021-SECY-MIB guide to understand how the SecY objects map to the underlying 802.1AE encryption state before deploying monitoring.

IPNetwork Monitor allows you to monitor SNMP objects defined in IEEE8021-SECY-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, not tied to a specific manufacturer
  • Ethernet switches, routers, and NICs implementing IEEE 802.1AE MACsec

Monitoring Examples

An operator would poll secyIfTable/secyIfEntry per secyIfInterfaceIndex, checking secyIfProtectFramesEnable to confirm MACsec protection is actually turned on for a link that is supposed to be encrypted, and secyIfCurrentCipherSuite to verify it matches the expected cipher rather than a weaker fallback. secyIfReplayProtectEnable combined with secyIfReplayProtectWindow would be checked to confirm the anti-replay window is set per policy, while secyIfRxMaxKeys/secyIfTxMaxKeys reveal how many keys the interface can hold during a key rollover, useful when diagnosing a failed rekey event.

What Can Be Monitored

  • MACsec frame protection enable status
  • frame validation mode
  • replay protection enable/window
  • current cipher suite in use
  • max supported peer secure channels
  • max Rx/Tx keys per interface
Imported Objects

From IF-MIB

InterfaceIndex
ifCounterDiscontinuityGroupOBJECT-GROUP

From SNMP-FRAMEWORK-MIB

SnmpAdminString

From SNMPv2-CONF

MODULE-COMPLIANCE
OBJECT-GROUP

From SNMPv2-SMI

Counter32
Counter64
Integer32
MODULE-IDENTITY
OBJECT-TYPE
Unsigned32

From SNMPv2-TC

RowPointer
RowStatus
TEXTUAL-CONVENTION
TimeStamp
TruthValue
OIDs

RFC description

Defines MAC security entity (SecY) managed objects supporting IEEE 802.1AE MACsec protocol for MAC-layer security and secure channels.

Start monitoring Vendor-neutral IEEE 802.1AE standard (Ethernet switch/router/NIC implementing MACsec) 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 IEEE8021-SECY-MIB