Home » VMware » VCP550D » Which condition would cause this loss of connectivity?
-- Exhibit —
-- Exhibit —
A vSphere administrator assigns VLAN 3389 to the Production port group on the VCP_DCV_Example vSphere Distributed Switch. After the change, users report a loss of connectivity to their applications. Further analysis provides the following data:
The cluster has not had a ESXi host failure.
Application functioned normally prior to the change.
The loss of connectivity occurred immediately following the change.
Which condition would cause this loss of connectivity?
A. The physical switch ports used by the vmnics have not been configured with 802.1Q.
B. Maintenance Mode was initiated on one of the hosts in the cluster. Connectivity will resume after the virtual machines are migrated.
C. All uplinks were removed from the VCP_DCV_Example switch and added to another virtual switch.
D. A load balancing setting on the port group conflicts with the load balancing setting of the switch.
Correct Answer: A
Explanation/Reference:
Explanation:
To make VLANs work properly with a port group, the uplinks for that vSwitch must be connected to a physical switch port configured as a trunk port. A trunk port understands how to pass traffic from multiple VLANs simultaneously while also preserving the VLAN IDs on the traffic. It does this by maintaining the 802.1q VLAN tags for traffic moving through the trunk port to the connected device(s). Trunk ports are typically used for switch-to-switch connections to allow VLANs to pass freely between switches.
The physical switch ports should be correctly configured as trunk ports.
Incorrect Answers:
B: Maintenance Mode is useful when complete LUNs need to be removed for storage array maintenance, and it’s of specific assistance during a planned rebuild of VMFS datastores to version 5.
C: The diagram shows that there are active uplinks.
D: This is a connectivity issue, not a load balancing one.
References:
Marshall, Nick and Scott Lowe, Mastering VMware vSphere 5.5, Sybex, Indianapolis, 2014, pp 214, 215