I’m looking at the MAC addresses of two devices in the FDB table. Both devices are connected to the same switch configuration. However, one has IP address information while the other doesn’t. What could be causing this, and what am I overlooking? Thanks in advance.
| [Device] |
[MAC Address] |
[Vendor] |
[IPv4 Address] |
[Port] |
[Vlan] |
[Description] |
[First seen] |
[Last seen] |
|
| PEN–SW01 |
bc:08:f3:cb:3d:44 |
HP Inc. |
|
Gi1/0/5 |
148 |
GigabitEthernet1/0/5 |
20.12.2025 03:24 |
2minutes ago |
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| [Device] |
[MAC Address] |
[Vendor] |
[IPv4 Address] |
[Port] |
[Vlan] |
[Description] |
[First seen] |
[Last seen] |
| YB-KT-SA-SW |
01:22:64:89:6b:12 |
Hewlett Packard |
10.100.63.60 |
Gi1/0/10 |
60 |
GigabitEthernet1/0/10 |
3.12.2025 11:45 |
3minutes ago |
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Does bc:08:f3:cb:3d:44 appear in the LibreNMS ARP table? I believe IPs in FDB are derived from ARP.