All MIBs › ACC-MIB › oIpSubDirBcast
oIpSubDirBcast
Module: ACC-MIB
OID (symbolic): ACC-MIB::oIpSubDirBcast
OID (numeric): 1.3.6.1.4.1.5.1.1.18.4
Node type: OBJECT-TYPE
Type: INTEGER
Access: read-write
Description: Packets with an all-ones host portion of the destination IP address are called Subnet Directed Broadcast (or Limited Broadcast) packets. This object selects if these packets are to be broadcast onto the destination subnet.
What is oIpSubDirBcast?
This OID controls whether subnet-directed broadcast packets (those with all-ones in the host portion of the address) are forwarded to their destination network. Administrators configure this to prevent broadcast storms and security risks from directed broadcast attacks that can amplify denial-of-service exploits. Setting this to 0 blocks subnet-directed broadcasts while 1 allows them, though most modern networks disable this for security.
Examples
Walk all instances (SNMPv2c):
snmpwalk -v2c -c public <target> 1.3.6.1.4.1.5.1.1.18.4 snmpwalk -v2c -c public <target> ACC-MIB::oIpSubDirBcast
Get a specific instance (index 1):
snmpget -v2c -c public <target> 1.3.6.1.4.1.5.1.1.18.4.1 snmpget -v2c -c public <target> ACC-MIB::oIpSubDirBcast.1
Set instance 1 (SNMPv2c):
snmpset -v2c -c private <target> 1.3.6.1.4.1.5.1.1.18.4.1 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 |
| 1.3.6.1.4.1.5.1.1.18 | accIpFilter | ACC-IPFILTER |
| Numeric OID | Name | Module |
|---|---|---|
| 1.3.6.1.4.1.5 | acc | ACC-MIB |
| 1.3.6.1.4.1.5.1 | accSBAR | ACC-MIB |
| 1.3.6.1.4.1.5.1.1 | accBRG | ACC-MIB |
| 1.3.6.1.4.1.5.1.1.18.4 | oIpSubDirBcast | ACC-MIB |