All MIBs › CDMIPController › cdmipEthernetSubnetPrefixLen
cdmipEthernetSubnetPrefixLen
Module: CDMIPController
OID (symbolic): CDMIPController::cdmipEthernetSubnetPrefixLen
OID (numeric): 1.3.6.1.4.1.6247.4.3.1.4
Node type: OBJECT-TYPE
Type: INTEGER
Access: read-write
Description: The subnet mask prefix length for the Ethernet interface.
What is cdmipEthernetSubnetPrefixLen?
This sets the subnet mask prefix length for the modem's Ethernet management IP address. Getting this wrong relative to the actual LAN subnet, too broad or too narrow, can make the modem think locally-reachable devices are on a different subnet or vice versa, breaking local management access even though the IP address itself is set correctly. Setting this to 24 for an Ethernet IP of 192.168.1.100 correctly scopes the modem to the 192.168.1.0/24 subnet; setting it to 30 by mistake would make the modem think almost every other device on that LAN is on a different subnet, requiring a gateway to reach them.
Examples
Walk all instances (SNMPv2c):
snmpwalk -v2c -c public <target> 1.3.6.1.4.1.6247.4.3.1.4 snmpwalk -v2c -c public <target> CDMIPController::cdmipEthernetSubnetPrefixLen
Get a specific instance (index 1):
snmpget -v2c -c public <target> 1.3.6.1.4.1.6247.4.3.1.4.1 snmpget -v2c -c public <target> CDMIPController::cdmipEthernetSubnetPrefixLen.1
Set instance 1 (SNMPv2c):
snmpset -v2c -c private <target> 1.3.6.1.4.1.6247.4.3.1.4.1 i <value>
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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 |
| 1.3.6.1.4.1.6247 | comtechEFData | ComtechEFData |
| Numeric OID | Name | Module |
|---|---|---|
| 1.3.6.1.4.1.6247.4 | cdmipController | CDMIPController |
| 1.3.6.1.4.1.6247.4.3 | cdmipInterfaces | CDMIPController |
| 1.3.6.1.4.1.6247.4.3.1 | cdmipEthernetInterface | CDMIPController |
| 1.3.6.1.4.1.6247.4.3.1.4 | cdmipEthernetSubnetPrefixLen | CDMIPController |