All MIBs › ACC-IPFILTER › accIpSubDirBcast
accIpSubDirBcast
Module: ACC-IPFILTER
OID (symbolic): ACC-IPFILTER::accIpSubDirBcast
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 accIpSubDirBcast?
This OID controls whether the router forwards subnet-directed broadcast packets (packets with all ones in the host portion of the destination address) onto the destination subnet. Network engineers enable or disable this to prevent broadcast storms while still allowing legitimate broadcast communication within trusted networks. An example is disabling it to block packets like 192.168.1.255 from being forwarded, which protects against certain denial-of-service attacks.
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-IPFILTER::accIpSubDirBcast
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-IPFILTER::accIpSubDirBcast.1
Set instance 1 (SNMPv2c):
snmpset -v2c -c private <target> 1.3.6.1.4.1.5.1.1.18.4.1 i <value>
Start monitoring ACC/Ericsson WAN access routers (legacy) with a free 30-day trial of IPNetwork Monitor. Create custom SNMP monitor using the ACC-IPFILTER::accIpSubDirBcast OID value, configure state conditions and alerts, and monitor any ACC/Ericsson WAN access routers (legacy) from a single console.
OID Breakdown
Upper-level ancestors (9 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 | 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 |
| Numeric OID | Name | Module |
|---|---|---|
| 1.3.6.1.4.1.5.1.1.18 | accIpFilter | ACC-IPFILTER |
| 1.3.6.1.4.1.5.1.1.18.4 | accIpSubDirBcast | ACC-IPFILTER |