IPV6-MIB :: ipv6IfEffectiveMtu

MIB Reference — IPNetwork Monitor · Updated September 14, 2026

All MIBsIPV6-MIBipv6IfEffectiveMtu

ipv6IfEffectiveMtu

Module: IPV6-MIB

OID (symbolic): IPV6-MIB::ipv6IfEffectiveMtu

OID (numeric): 1.3.6.1.2.1.55.1.5.1.4

Node type: OBJECT-TYPE

Type: Unsigned32

Access: read-only

Description: The size of the largest IPv6 packet which can be sent/received on the interface, specified in octets.

This object is obsolete. The value of IF-MIB::ifMtu for the corresponding value of ifIndex represents the MTU of the interface.

What is ipv6IfEffectiveMtu?

Reported the largest IPv6 packet size, in octets, the interface could send or receive. Obsolete — an admin should instead read IF-MIB::ifMtu for the same interface's MTU.

Examples

Walk all instances (SNMPv2c):

snmpwalk -v2c -c public <target> 1.3.6.1.2.1.55.1.5.1.4
snmpwalk -v2c -c public <target> IPV6-MIB::ipv6IfEffectiveMtu

Get a specific instance (index 1):

snmpget -v2c -c public <target> 1.3.6.1.2.1.55.1.5.1.4.1
snmpget -v2c -c public <target> IPV6-MIB::ipv6IfEffectiveMtu.1

SNMPv3 example:

snmpget -v3 -l authPriv -u snmpv3-user -a SHA -A "AuthPassword1" -x AES -X "PrivPassword1" <target> ipv6IfEffectiveMtu.1

Start monitoring Vendor-neutral IETF standard, obsolete (IPv6-capable routers, switches, hosts) with a free 30-day trial of IPNetwork Monitor. Create custom SNMP monitor using the IPV6-MIB::ipv6IfEffectiveMtu OID value, configure state conditions and alerts, and monitor any Vendor-neutral IETF standard, obsolete (IPv6-capable routers, switches, hosts) from a single console.

OID Breakdown

Upper-level ancestors (6 from the standard OID tree / other modules)
Numeric OIDNameModule
1isoLANART-AGENT
1.3orgAirPair-MIB
1.3.6dodAirPair-MIB
1.3.6.1internetAirPair-MIB
1.3.6.1.2mgmtAXON-MIB
1.3.6.1.2.1mib_2AXON-MIB
Numeric OIDNameModule
1.3.6.1.2.1.55ipv6MIBIPV6-MIB
1.3.6.1.2.1.55.1ipv6MIBObjectsIPV6-MIB
1.3.6.1.2.1.55.1.5ipv6IfTableIPV6-MIB
1.3.6.1.2.1.55.1.5.1ipv6IfEntryIPV6-MIB
1.3.6.1.2.1.55.1.5.1.4ipv6IfEffectiveMtuIPV6-MIB