FCoE VLAN Mapping for FIP and FCoE Traffic: CCIE Security Exam 400-251 - Cisco

FCoE VLAN Mapping

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Question

The FCoE VLAN is used to carry FIP and FCoE traffic for the corresponding VSAN.

Which two statements about this mapping are true? (Choose two.)

Answers

Explanations

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A. B. C. D. E.

AB.

FCoE VLAN is used to carry FIP (FCoE Initialization Protocol) and FCoE (Fibre Channel over Ethernet) traffic for the corresponding VSAN (Virtual SAN). In order to ensure that the FCoE VLAN is correctly configured and operational, it is important to understand the mapping between the VLAN and the VSAN.

A) The VLAN-VSAN mapping must be configured consistently in the entire fabric: This statement is true because the VLAN-VSAN mapping must be consistent across all switches in the fabric. If there is a mismatch in the VLAN-VSAN mapping between switches, it can result in FCoE traffic being dropped or misrouted.

B) This mapping can only carry Fibre Channel control and data traffic: This statement is false. While the FCoE VLAN is primarily used to carry Fibre Channel traffic, it can also carry other types of traffic, such as IP traffic, if the interface is set to Shared.

C) There must be same VLANs on the A and B SANs: This statement is not entirely clear, but it is likely false. There is no requirement for the VLANs on the A and B SANs to be the same. However, it is important that the VLAN-VSAN mapping is consistent across both SANs.

D) IP traffic is allowed if the interface is set to Shared: This statement is true. If the interface is set to Shared, it means that the FCoE VLAN is shared with other types of traffic, such as IP traffic. In this case, the FCoE VLAN can carry both Fibre Channel and IP traffic.

E) The VLAN must match the CNA setting: This statement is true. The VLAN configured on the CNA (Converged Network Adapter) must match the VLAN configured on the switch port. If there is a mismatch, it can result in FCoE traffic being dropped or misrouted.

In summary, statements A and D are true about the mapping between the FCoE VLAN and the corresponding VSAN. The VLAN-VSAN mapping must be configured consistently in the entire fabric, and IP traffic is allowed if the interface is set to Shared. Statement E is also true, as the VLAN must match the CNA setting. Statement B is false, as the FCoE VLAN can carry other types of traffic besides Fibre Channel traffic. Statement C is not entirely clear, but it is likely false, as there is no requirement for the VLANs on the A and B SANs to be the same.