IEEE8021-AS-MIB :: ieee8021AsPortDSNupMs

MIB Reference — IPNetwork Monitor · Updated October 05, 2026

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ieee8021AsPortDSNupMs

Module: IEEE8021-AS-MIB

OID (symbolic): IEEE8021-AS-MIB::ieee8021AsPortDSNupMs

OID (numeric): 1.3.111.2.802.1.1.20.1.5.1.32

Node type: OBJECT-TYPE

Type: Unsigned32

Access: read-write

Description: The most significant 32 bits, of unsigned 64 bit fixed point number between 0 and less than 2. For an OLT port of an IEEE 802.3 EPON link, the value is the effective index of refraction for the EPON upstream wavelength light of the optical path (see 13.1.4 and 13.8.1.2). The default value is 1.46770 for 1 Gb/s upstream links, and 1.46773 for 10 Gb/s upstream links. For all other ports, the value is 0.

This object MUST be read or written at the same time as ieee8021AsPortDSNupLs, which represents least significant 32 bits of the value in order for the read or write operation to succeed.

The contents of this variable SHALL be maintained across a restart of the system.

What is ieee8021AsPortDSNupMs?

Most significant 32 bits of the effective index of refraction for the EPON upstream wavelength on this port (0 on non-EPON ports, roughly 1.4677 for 1Gb/s upstream, 1.46773 for 10Gb/s); combine with the Ls object. Only meaningful when this port terminates an IEEE 802.3 EPON link, where it's used to correct optical propagation-delay measurements.

Examples

Walk all instances (SNMPv2c):

snmpwalk -v2c -c public <target> 1.3.111.2.802.1.1.20.1.5.1.32
snmpwalk -v2c -c public <target> IEEE8021-AS-MIB::ieee8021AsPortDSNupMs

Get a specific instance (index 1):

snmpget -v2c -c public <target> 1.3.111.2.802.1.1.20.1.5.1.32.1
snmpget -v2c -c public <target> IEEE8021-AS-MIB::ieee8021AsPortDSNupMs.1

Set instance 1 (SNMPv2c):

snmpset -v2c -c private <target> 1.3.111.2.802.1.1.20.1.5.1.32.1 i <value>

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OID Breakdown

Upper-level ancestors (3 from the standard OID tree / other modules)
Numeric OIDNameModule
1isoLANART-AGENT
1.3orgAirPair-MIB
1.3.111.2.802.1.1ieee802dot1mibsIEEE8021-TC-MIB
Numeric OIDNameModule
1.3.111.2.802.1.1.20ieee8021AsTimeSyncMibIEEE8021-AS-MIB
1.3.111.2.802.1.1.20.1ieee8021AsMIBObjectsIEEE8021-AS-MIB
1.3.111.2.802.1.1.20.1.5ieee8021AsPortDSIfTableIEEE8021-AS-MIB
1.3.111.2.802.1.1.20.1.5.1ieee8021AsPortDSIfEntryIEEE8021-AS-MIB
1.3.111.2.802.1.1.20.1.5.1.32ieee8021AsPortDSNupMsIEEE8021-AS-MIB