Guidelines for Private VLAN Configuration in FabricPath
Question
Which two guidelines apply to private VLAN configuration when you are running FabricPath (Choose two.)
Answers
Explanations
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A. B. C. D.AD.
Private VLANs (PVLANs) are used to provide Layer 2 isolation between devices in the same VLAN. When running FabricPath, there are certain guidelines that need to be followed when configuring PVLANs. Let's go through each of the options and determine which ones are correct.
A. On the F-Series modules, user-configured static MAC addresses are programmed on all forwarding engines that have ports in that VLAN.
This statement is true. F-Series modules are line cards that are used in Cisco Nexus switches. FabricPath is a Cisco proprietary technology that is used to provide Layer 2 multipathing in the data center. When configuring PVLANs in FabricPath, it is important to note that user-configured static MAC addresses are programmed on all forwarding engines that have ports in that VLAN. This ensures that the MAC addresses are learned by all switches in the FabricPath network.
B. The system does support hierarchical static MAC addresses.
This statement is not relevant to the configuration of PVLANs in FabricPath. Hierarchical static MAC addresses are used in some data center architectures to provide a scalable way to manage MAC address learning. However, this is not specific to PVLANs in FabricPath.
C. FabricPath ports can be put into a private VLAN.
This statement is true. FabricPath ports can be put into a private VLAN. In fact, PVLANs can be used to provide Layer 2 isolation between FabricPath ports on the same switch.
D. All VLANs in a private VLAN must be in the same VLAN mode; either CE or FabricPath.
This statement is also true. When configuring PVLANs in FabricPath, all VLANs in a private VLAN must be in the same VLAN mode. This means that either all VLANs in the private VLAN must be CE VLANs (connected endpoints) or FabricPath VLANs. This is because FabricPath VLANs use a different MAC address format than CE VLANs, and mixing the two types of VLANs in a private VLAN can cause issues with MAC address learning.
In summary, the correct answers are A and D. When configuring PVLANs in FabricPath, it is important to ensure that user-configured static MAC addresses are programmed on all forwarding engines that have ports in that VLAN and that all VLANs in a private VLAN must be in the same VLAN mode. Additionally, FabricPath ports can be put into a private VLAN to provide Layer 2 isolation between devices in the same VLAN.
