All MIBs › CROUTE-MIB › ipInterfaceForwardIpBroadcast
ipInterfaceForwardIpBroadcast
Module: CROUTE-MIB
OID (symbolic): CROUTE-MIB::ipInterfaceForwardIpBroadcast
OID (numeric): 1.3.6.1.4.1.81.31.1.2.1.5
Node type: OBJECT-TYPE
Type: INTEGER
Access: read-write
Description: Whether the router forwards IP directed broadcasts that are to be transmitted as link-layer broadcast to an attached net or subnet.
What is ipInterfaceForwardIpBroadcast?
This read-write enumerated integer controls whether the router forwards IP directed broadcasts by converting them to a link-layer broadcast on the attached subnet. An admin disables this on interfaces facing untrusted networks to block smurf-style broadcast amplification attacks. For example, disabling ipInterfaceForwardIpBroadcast on an internet-facing interface prevents external hosts from triggering a broadcast flood on the internal subnet.
Examples
Walk all instances (SNMPv2c):
snmpwalk -v2c -c public <target> 1.3.6.1.4.1.81.31.1.2.1.5 snmpwalk -v2c -c public <target> CROUTE-MIB::ipInterfaceForwardIpBroadcast
Get a specific instance (index 1):
snmpget -v2c -c public <target> 1.3.6.1.4.1.81.31.1.2.1.5.1 snmpget -v2c -c public <target> CROUTE-MIB::ipInterfaceForwardIpBroadcast.1
Set instance 1 (SNMPv2c):
snmpset -v2c -c private <target> 1.3.6.1.4.1.81.31.1.2.1.5.1 i <value>
Start monitoring Layer 3 switch platform (vendor unclear, BOOTP/RIP) with a free 30-day trial of IPNetwork Monitor. Create custom SNMP monitor using the CROUTE-MIB::ipInterfaceForwardIpBroadcast OID value, configure state conditions and alerts, and monitor any Layer 3 switch platform (vendor unclear, BOOTP/RIP) 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 |
| 1.3.6.1.4.1.81 | lannet | GEN-MIB |
| Numeric OID | Name | Module |
|---|---|---|
| 1.3.6.1.4.1.81.31 | croute | CROUTE-MIB |
| 1.3.6.1.4.1.81.31.1 | ipRoute | CROUTE-MIB |
| 1.3.6.1.4.1.81.31.1.2 | ipInterfaceTable | CROUTE-MIB |
| 1.3.6.1.4.1.81.31.1.2.1 | ipInterfaceEntry | CROUTE-MIB |
| 1.3.6.1.4.1.81.31.1.2.1.5 | ipInterfaceForwardIpBroadcast | CROUTE-MIB |