All MIBs › CHECKPOINT-MIB-2 › atPhysAddress
atPhysAddress
Module: CHECKPOINT-MIB-2
OID (symbolic): CHECKPOINT-MIB-2::atPhysAddress
OID (numeric): 1.3.6.1.2.1.3.1.1.2
Node type: OBJECT-TYPE
Type: PhysAddress
Access: read-write
Description: The media-dependent `physical' address.
Setting this object to a null string (one of zero length) has the effect of invaliding the corresponding entry in the atTable object. That is, it effectively dissasociates the interface identified with said entry from the mapping identified with said entry. It is an implementation-specific matter as to whether the agent removes an invalidated entry from the table. Accordingly, management stations must be prepared to receive tabular information from agents that corresponds to entries not currently in use. Proper interpretation of such entries requires examination of the relevant atPhysAddress object.
What is atPhysAddress?
Holds the media-dependent physical address associated with this address-translation entry, and per the DESCRIPTION, writing a zero-length string invalidates the entry. The write capability specifically means an admin can clear a stale mapping remotely via SNMP set rather than needing CLI access, useful for scrubbing a poisoned or outdated entry during an ARP-spoofing investigation. Example: setting atPhysAddress to an empty string on an entry pointing to a suspicious MAC immediately invalidates that mapping without touching any other entries in the table.
Examples
Walk all instances (SNMPv2c):
snmpwalk -v2c -c public <target> 1.3.6.1.2.1.3.1.1.2 snmpwalk -v2c -c public <target> CHECKPOINT-MIB-2::atPhysAddress
Get a specific instance (index 1):
snmpget -v2c -c public <target> 1.3.6.1.2.1.3.1.1.2.1 snmpget -v2c -c public <target> CHECKPOINT-MIB-2::atPhysAddress.1
Set instance 1 (SNMPv2c):
snmpset -v2c -c private <target> 1.3.6.1.2.1.3.1.1.2.1 s <value>
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OID Breakdown
Upper-level ancestors (6 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 |
| 1.3.6.1.2 | mgmt | AXON-MIB |
| 1.3.6.1.2.1 | mib_2 | AXON-MIB |
| Numeric OID | Name | Module |
|---|---|---|
| 1.3.6.1.2.1.3 | at | CHECKPOINT-MIB-2 |
| 1.3.6.1.2.1.3.1 | atTable | CHECKPOINT-MIB-2 |
| 1.3.6.1.2.1.3.1.1 | atEntry | CHECKPOINT-MIB-2 |
| 1.3.6.1.2.1.3.1.1.2 | atPhysAddress | CHECKPOINT-MIB-2 |