CCNP R&S Question of the Week: Private VLANs

April 10, 2015 Johnny Bass Cisco, Cloudera, Featured, Professional Development, Project Management, Routing & Switching, Technology, Training in Business

What should you complete first when configuring private VLANs?

A. Configure the private VLAN port parameters.
B. Configure and map the secondary VLAN to the primary VLAN.
C. Disable IGMP snooping.
D. Set the VTP mode to transparent.

Reveal Answer

Answer: D.

Not all Cisco switches support private VLANs. If the switch is running VTP version 1 or version 2, then the VTP mode must be set to transparent first before any private VLAN configuration will be accepted. This guarantees that VTP will not propagate information about the private VLANs to a switch that won’t understand them.

Related Resources
Cisco White Papers

Related Course
CCNP Routing and Switching e-Camp

CCNP R&S Question of the Week Series

CCNP R&S Question of the Week: IPv6
CCNP R&S Question of the Week: BGP Attribute
CCNP R&S Question of the Week: Gateway of Last Resort
CCNP R&S Question of the Week: Routing Protocols into OSPF
CCNP R&S Question of the Week: BPDU Guard
CCNP R&S Question of the Week: Private VLANs

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