FieldengNetworking & Communications
VLAN ID
Classify an IEEE 802.1Q VLAN identifier as usable or reserved.
Networking & Communications
Classify an IEEE 802.1Q VLAN identifier as usable or reserved.
App id: NET-15. Reference version 1.0.
How to fill it
Fill the inputs. The tool shows the outputs.
On the tool screen, Calc is the working sheet. Presets stores values you reuse. Reference is the formula, assumptions, and provenance below.
Formula
0 and 4095 reserved; 1–4094 usableInputs
| Name | Unit |
|---|---|
| VLAN ID | 1 |
Outputs
| Name | Unit |
|---|---|
| VLAN ID | 1 |
| Usable (1 = yes) (hero result) | 1 |
Diagnose
Observations are context. They do not pass or fail a structure. See Diagnose.
| When | Observation | Severity |
|---|---|---|
VLAN ID = 0 | Reserved / special | caution |
VLAN ID = 4095 | Reserved | caution |
Otherwise | Normal VLAN ID range | info |
Assumptions
- Does not check whether a given ID is configured on a particular switch.
Provenance
- IEEE 802.1Q VLAN ID space. 0 and 4095 are reserved/special.