cfSubnetMask
Module: NAT
OID (symbolic): NAT::cfSubnetMask
OID (numeric): 1.3.6.1.4.1.86.2.1.7
Node type: OBJECT-TYPE
Type: IpAddress
Access: read-write
What is cfSubnetMask?
No DESCRIPTION is present in the source, so this reading is inferred from the IpAddress syntax and its pairing with cfDevIPAddr in the configuration group. It holds the subnet mask that applies to the device's primary IP address. An admin sets it alongside cfDevIPAddr whenever the device is moved to a differently-sized subnet.
Examples
Walk all instances (SNMPv2c):
snmpwalk -v2c -c public <target> 1.3.6.1.4.1.86.2.1.7 snmpwalk -v2c -c public <target> NAT::cfSubnetMask
Get a specific instance (index 1):
snmpget -v2c -c public <target> 1.3.6.1.4.1.86.2.1.7.1 snmpget -v2c -c public <target> NAT::cfSubnetMask.1
Set instance 1 (SNMPv2c):
snmpset -v2c -c private <target> 1.3.6.1.4.1.86.2.1.7.1 a <value>
Start monitoring NAT-capable router/firewall (vendor unspecified) with a free 30-day trial of IPNetwork Monitor. Create custom SNMP monitor using the NAT::cfSubnetMask OID value, configure state conditions and alerts, and monitor any NAT-capable router/firewall (vendor unspecified) from a single console.
OID Breakdown
Upper-level ancestors (7 from the standard OID tree / other modules)
| Numeric OID | Name | Module |
|---|---|---|
| 1 | iso | LANART-AGENT |
| 1.3 | org | AirPair-MIB |
| 1.3.6 | dod | AirPair-MIB |
| 1.3.6.1 | internet | AirPair-MIB |
| 1.3.6.1.4 | private | AirPair-MIB |
| 1.3.6.1.4.1 | enterprises | AirPair-MIB |
| 1.3.6.1.4.1.86 | nat | CMU-MIB |
| Numeric OID | Name | Module |
|---|---|---|
| 1.3.6.1.4.1.86.2 | natmib | NAT |
| 1.3.6.1.4.1.86.2.1 | configuration | NAT |
| 1.3.6.1.4.1.86.2.1.7 | cfSubnetMask | NAT |