Vlan database

Q: How deeply does Acing the CCNA Exam: Volume 1 Fundamentals and Protocols cover vlan database?

Explains defaults, reserved ranges, storage, creation, naming, shutdown, and verification, but not database internals.

As explained in Acing the CCNA Exam: Volume 1 Fundamentals and Protocols

A VLAN database is a switch-maintained record of configured VLANs and the ports assigned to them.

A VLAN database is the switch-maintained record of VLANs and their assigned ports. Use show vlan brief to view it. New switches place all ports in default VLAN 1; VLANs 1002–1005 are reserved legacy VLANs. section 12.2.1

Key operational details:

Create and name VLANs with vlan vlan-id followed by name vlan-name; naming is optional. section 12.2.1
Store the database in flash memory as vlan.dat. section 13.2
Keep VLAN databases consistent across switches when trunks carry the same VLAN; a switch can drop frames for a VLAN absent from its database. section 13.2

Creating VLANs

On SW1, vlan 10 followed by name Engineering creates an active VLAN named Engineering. Verify the entry and its ports with show vlan brief.

How Acing the CCNA Exam: Volume 1 Fundamentals and Protocols covers it

Cover of Acing the CCNA Exam: Volume 1 Fundamentals and Protocols

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Related concepts

network switchpart of · A network switch is a device that connects devices within a local network and selectively forwards data-link-layer frames to their intended destinations.
flash memorypart of · Flash memory is nonvolatile semiconductor storage that retains data without power and can be electrically erased and rewritten.
show vlan briefused by · show vlan brief is a Cisco IOS command that displays configured VLANs, their status, and their assigned switch ports.
VTPused by · VTP is Cisco's protocol for distributing VLAN configuration information within a management domain.
VTP revision numbermeasured by · A VTP revision number is a version counter used to determine which VLAN database information should synchronize within a VTP domain.

This explainer was generated by Manning's knowledge graph from the text of Acing the CCNA Exam: Volume 1 Fundamentals and Protocols. The section links point to the parts of the book it draws on.