ARP / Layer 2 Inspector
MAC-to-IP mapping, OUI vendor resolution, and Layer 2 conflict detection across the local subnet.
RFC 826
RFC 5227
RFC 7042
RFC 1122
ARP ConfigurationSimulation Mode
| IP | MAC | VENDOR | INTERFACE | ENTRY TYPE | TTL | CONFLICT |
|---|---|---|---|---|---|---|
| - | - | - | - | - | - | - |
| address | label | description | rfc |
|---|---|---|---|
| ff:ff:ff:ff:ff:ff | Broadcast | Sent to all hosts on the local segment; used in ARP requests | RFC 826 |
| 00:00:00:00:00:00 | Unspecified | Null MAC; used as sender hardware address in ARP probes | RFC 5227 |
| 01:00:5e:00:00:00/24 | IPv4 Multicast Range | IANA-reserved OUI block for IPv4 multicast group addresses | RFC 7042 |
| 169.254.0.0/16 | Link-Local (APIPA) | Self-assigned when DHCP fails; ARP conflicts here trigger re-probe | RFC 5227 |
| 0.0.0.0 | Unspecified Source | Used as sender IP in ARP probes before address assignment is confirmed | RFC 5227 |
| 255.255.255.255 | Limited Broadcast | Not routed; ARP is never sent to this address but may appear in malformed frames |