Cisco Cisco UCS B440 M1 High-Performance Blade Server Manual Técnica

Cisco recommends that you have knowledge of these topics:

UCS

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Cisco Nexus 1000 V (N1K)

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VMware

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Layer 2 (L2) switching

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This document is not restricted to specific software and hardware versions.

The information in this document was created from the devices in a specific lab environment. All of
the devices used in this document started with a cleared (default) configuration. If your network is
live, make sure that you understand the potential impact of any command.

A private VLAN is a VLAN configured for L2 isolation from other ports within the same private
VLAN. Ports that belong to a PVLAN are associated with a common set of support VLANs, which
are used in order to create the PVLAN structure.

There are three types of PVLAN ports:

A promiscuous port communicates with all other PVLAN ports and is the port used in order
to communicate with devices outside of the PVLAN.

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An isolated port has complete L2 separation (including broadcasts) from other ports within
the same PVLAN with the exception of the promiscuous port.

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A community port can communicate with other ports in the same PVLAN as well as the
promiscuous port. Community ports are isolated at L2 from ports in other communities or
isolated PVLAN ports. Broadcasts are only propagated to other ports in the community and
the promiscuous port.

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Refer to 

 in order to understand the theory, operation, and concepts of PVLANs.

UCS closely resembles the Nexus 5000/2000 architecture, where the Nexus 5000 is analogous to
the UCS 6100 and the Nexus 2000 to the UCS 2104 Fabric Extenders.

Many limitations of PVLAN functionality in UCS are caused by the limitations found in the Nexus
5000/2000 implementation.

Important points to remember are: